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cf-standard-name-table.html
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<html>
<title>CF Standard Names</title>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>
cf-standard-name-table.html
</title>
<h1 class="documentFirstHeading">CF Standard Name Table</h1>
<div class="documentByLine"><div class="reviewHistory"></div></div>
<div class="plain"><script>
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</head>
<body>
<b>Version 7,
<newdate>20 November 2007</newdate></b><br><br>
Refer to the <span class="link-external"><a href="http://cfconventions.org/Data/cf-standard-names/docs/guidelines.html">Guidelines for Construction of CF Standard Names</a></span> for information on how the names are constructed and interpreted, and how new names could be derived.
<br><br><b>A note about units</b><br>
The canonical units associated with each standard name are usually the SI units for the quantity. <span class="link-external"><a href="http://cfconventions.org/cf-conventions/cf-conventions.html#standard-name">Section 3.3 of the CF conventions</a></span> states: "Unless it is dimensionless, a variable with a standard_name attribute must have units which are physically equivalent (not necessarily identical) to the canonical units, possibly modified by an operation specified by either the standard name modifier ... or by the cell_methods attribute." Furthermore, <span class="link-external"><a href="http://cfconventions.org/cf-conventions/cf-conventions.html#_overview"> Section 1.3 of the CF conventions</a></span> states: "The values of the units attributes are character strings that are recognized by UNIDATA's Udunits package [UDUNITS], (with exceptions allowed as discussed in Section 3.1, “Units”)." For example, a variable with the standard name of "air_temperature" may have a units attribute of "degree_Celsius" because Celsius can be converted to Kelvin by Udunits. For the full range of supported units, refer to the <a href="https://www.unidata.ucar.edu/software/udunits/udunits-current/doc/udunits/udunits2.html#Database"> Udunits documentation</a>. Refer to the <a href="http://cfconventions.org/cf-conventions/cf-conventions.html"> CF conventions</a> for full details of the units attribute.<br><br><div style="border: 1px solid rgb(153, 153, 153); background-color: rgb(204, 204, 204); padding-top: 10px; padding-left: 10px; padding-bottom: 10px; margin-bottom: 10px;">
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Found <span id="filter_matches_num"></span> standard names matching query: <span id="filter_matches_query"></span>
</div>
<h2>View by Category</h2>
<table cellpadding="4" cellspacing="0" border="1">
<tr>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='aerosol dry.*deposition wet.*deposition production emission mole'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Atmospheric Chemistry</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='air_pressure atmosphere.*vorticity atmosphere.*streamfunction wind momentum.*in_air gravity_wave ertel geopotential omega atmosphere.*dissipation atmosphere.*energy atmosphere.*drag atmosphere.*stress surface.*stress'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Atmosphere Dynamics</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='carbon leaf vegetation'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Carbon Cycle</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='cloud'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Cloud</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='atmosphere_water canopy_water precipitation rain snow moisture freshwater runoff root humidity transpiration evaporation water_vapour river'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Hydrology</a></td>
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<tr>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='ocean.*streamfunction sea_water_velocity ocean.*vorticity'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Ocean Dynamics</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='radiative longwave shortwave brightness radiance albedo'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Radiation</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='sea_ice'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Sea Ice</a></td>
<td><a href="javascript:void(0)" onclick="document.getElementById('filter_text').value='surface'; document.getElementById('logical_operator_or').click(); document.getElementById('btn_search').onclick();">Surface</a></td>
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</table>
</div>
<table id="standard_name_table" border="1" width="100%" cellpadding="2" cellspacing="0">
<th width="76%">Standard Name</th>
<th width="8%">Canonical Units</th>
<th width="8%">AMIP</th>
<th width="8%">GRIB</th>
<tr id="aerosol_angstrom_exponent_tr">
<td>
<a name="aerosol_angstrom_exponent"></a><img id="aerosol_angstrom_exponent_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('aerosol_angstrom_exponent')">aerosol_angstrom_exponent</a></code><div id="aerosol_angstrom_exponent_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Aerosol" means the suspended liquid or solid particles in air (except cloud droplets).</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_density_tr">
<td>
<a name="air_density"></a><img id="air_density_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_density')">air_density</a></code><div id="air_density_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">
No help available.
</div>
</td>
<td>kg m-3</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_potential_temperature_tr">
<td>
<a name="air_potential_temperature"></a><img id="air_potential_temperature_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_potential_temperature')">air_potential_temperature</a></code><div id="air_potential_temperature_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure.</div>
</td>
<td>K</td>
<td>theta</td>
<td>13</td>
</tr>
<tr id="air_pressure_tr">
<td>
<a name="air_pressure"></a><img id="air_pressure_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure')">air_pressure</a></code><div id="air_pressure_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">
No help available.
</div>
</td>
<td>Pa</td>
<td>plev</td>
<td>1</td>
</tr>
<tr id="air_pressure_anomaly_tr">
<td>
<a name="air_pressure_anomaly"></a><img id="air_pressure_anomaly_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_anomaly')">air_pressure_anomaly</a></code><div id="air_pressure_anomaly_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"anomaly" means difference from climatology.</div>
</td>
<td>Pa</td>
<td>
</td>
<td>26</td>
</tr>
<tr id="air_pressure_at_cloud_base_tr">
<td>
<a name="air_pressure_at_cloud_base"></a><img id="air_pressure_at_cloud_base_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_cloud_base')">air_pressure_at_cloud_base</a></code><div id="air_pressure_at_cloud_base_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">cloud_base refers to the base of the lowest cloud.</div>
</td>
<td>Pa</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_pressure_at_cloud_top_tr">
<td>
<a name="air_pressure_at_cloud_top"></a><img id="air_pressure_at_cloud_top_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_cloud_top')">air_pressure_at_cloud_top</a></code><div id="air_pressure_at_cloud_top_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">cloud_top refers to the top of the highest cloud.</div>
</td>
<td>Pa</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_pressure_at_convective_cloud_base_tr">
<td>
<a name="air_pressure_at_convective_cloud_base"></a><img id="air_pressure_at_convective_cloud_base_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_convective_cloud_base')">air_pressure_at_convective_cloud_base</a></code><div id="air_pressure_at_convective_cloud_base_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">cloud_base refers to the base of the lowest cloud. Convective cloud is that produced by the convection schemes in an atmosphere model.</div>
</td>
<td>Pa</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_pressure_at_convective_cloud_top_tr">
<td>
<a name="air_pressure_at_convective_cloud_top"></a><img id="air_pressure_at_convective_cloud_top_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_convective_cloud_top')">air_pressure_at_convective_cloud_top</a></code><div id="air_pressure_at_convective_cloud_top_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">cloud_top refers to the top of the highest cloud. Convective cloud is that produced by the convection schemes in an atmosphere model.</div>
</td>
<td>Pa</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_pressure_at_freezing_level_tr">
<td>
<a name="air_pressure_at_freezing_level"></a><img id="air_pressure_at_freezing_level_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_freezing_level')">air_pressure_at_freezing_level</a></code><div id="air_pressure_at_freezing_level_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">
No help available.
</div>
</td>
<td>Pa</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_pressure_at_sea_level_tr">
<td>
<a name="air_pressure_at_sea_level"></a><img id="air_pressure_at_sea_level_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_pressure_at_sea_level')">air_pressure_at_sea_level</a></code><div id="air_pressure_at_sea_level_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">sea_level means mean sea level, which is close to the geoid in sea areas. Air pressure at sea level is the quantity often abbreviated as MSLP or PMSL.</div>
</td>
<td>Pa</td>
<td>psl</td>
<td>2 E151</td>
</tr>
<tr id="air_temperature_tr">
<td>
<a name="air_temperature"></a><img id="air_temperature_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_temperature')">air_temperature</a></code><div id="air_temperature_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Air temperature is the bulk temperature of the air, not the surface (skin) temperature.</div>
</td>
<td>K</td>
<td>ta</td>
<td>11 E130</td>
</tr>
<tr id="air_temperature_anomaly_tr">
<td>
<a name="air_temperature_anomaly"></a><img id="air_temperature_anomaly_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_temperature_anomaly')">air_temperature_anomaly</a></code><div id="air_temperature_anomaly_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"anomaly" means difference from climatology. Air temperature is the bulk temperature of the air, not the surface (skin) temperature.</div>
</td>
<td>K</td>
<td>
</td>
<td>25</td>
</tr>
<tr id="air_temperature_at_cloud_top_tr">
<td>
<a name="air_temperature_at_cloud_top"></a><img id="air_temperature_at_cloud_top_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_temperature_at_cloud_top')">air_temperature_at_cloud_top</a></code><div id="air_temperature_at_cloud_top_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">cloud_top refers to the top of the highest cloud. Air temperature is the bulk temperature of the air, not the surface (skin) temperature.</div>
</td>
<td>K</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="air_temperature_lapse_rate_tr">
<td>
<a name="air_temperature_lapse_rate"></a><img id="air_temperature_lapse_rate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_temperature_lapse_rate')">air_temperature_lapse_rate</a></code><div id="air_temperature_lapse_rate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Air temperature is the bulk temperature of the air, not the surface (skin) temperature. A lapse rate is the negative derivative of a quantity with respect to increasing height above the surface, or the (positive) derivative with respect to increasing depth.</div>
</td>
<td>K m-1</td>
<td>
</td>
<td>19</td>
</tr>
<tr id="air_temperature_threshold_tr">
<td>
<a name="air_temperature_threshold"></a><img id="air_temperature_threshold_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('air_temperature_threshold')">air_temperature_threshold</a></code><div id="air_temperature_threshold_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Air temperature is the bulk temperature of the air, not the surface (skin) temperature. Air temperature excess and deficit are calculated relative to the air temperature threshold.</div>
</td>
<td>K</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="altitude_tr">
<td>
<a name="altitude"></a><img id="altitude_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('altitude')">altitude</a></code><div id="altitude_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level.</div>
</td>
<td>m</td>
<td>
</td>
<td>8</td>
</tr>
<tr id="altitude_at_top_of_dry_convection_tr">
<td>
<a name="altitude_at_top_of_dry_convection"></a><img id="altitude_at_top_of_dry_convection_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('altitude_at_top_of_dry_convection')">altitude_at_top_of_dry_convection</a></code><div id="altitude_at_top_of_dry_convection_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level.</div>
</td>
<td>m</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="area_fraction_tr">
<td>
<a name="area_fraction"></a><img id="area_fraction_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('area_fraction')">area_fraction</a></code><div id="area_fraction_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Area fraction" means the fraction of horizontal area. To specify which area is quantified by a variable of area_fraction, provide a coordinate variable or scalar coordinate variable of land_cover or surface_cover. Alternatively, if one is defined, use a more specific standard name of "X_area_fraction" for the fraction of horizontal area occupied by X.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="area_fraction_below_surface_tr">
<td>
<a name="area_fraction_below_surface"></a><img id="area_fraction_below_surface_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('area_fraction_below_surface')">area_fraction_below_surface</a></code><div id="area_fraction_below_surface_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The surface called "surface" means the lower boundary of the atmosphere. The fraction of horizontal area where the surface specified by the axes other than horizontal axes, for instance an isobaric surface, is below the (ground or sea) surface.</div>
</td>
<td>1</td>
<td>psbg</td>
<td>
</td>
</tr>
<tr id="atmosphere_absolute_vorticity_tr">
<td>
<a name="atmosphere_absolute_vorticity"></a><img id="atmosphere_absolute_vorticity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_absolute_vorticity')">atmosphere_absolute_vorticity</a></code><div id="atmosphere_absolute_vorticity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Absolute vorticity is the sum of relative vorticity and the upward component of vorticity due to the Earth's rotation.</div>
</td>
<td>s-1</td>
<td>
</td>
<td>41</td>
</tr>
<tr id="atmosphere_boundary_layer_thickness_tr">
<td>
<a name="atmosphere_boundary_layer_thickness"></a><img id="atmosphere_boundary_layer_thickness_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_boundary_layer_thickness')">atmosphere_boundary_layer_thickness</a></code><div id="atmosphere_boundary_layer_thickness_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The atmosphere boundary layer thickness is the "depth" or "height" of the (atmosphere) planetary boundary layer.</div>
</td>
<td>m</td>
<td>zmla</td>
<td>
</td>
</tr>
<tr id="atmosphere_cloud_condensed_water_content_tr">
<td>
<a name="atmosphere_cloud_condensed_water_content"></a><img id="atmosphere_cloud_condensed_water_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_cloud_condensed_water_content')">atmosphere_cloud_condensed_water_content</a></code><div id="atmosphere_cloud_condensed_water_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"condensed_water" means liquid and ice. "Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used.</div>
</td>
<td>kg m-2</td>
<td>clwvi</td>
<td>76</td>
</tr>
<tr id="atmosphere_cloud_ice_content_tr">
<td>
<a name="atmosphere_cloud_ice_content"></a><img id="atmosphere_cloud_ice_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_cloud_ice_content')">atmosphere_cloud_ice_content</a></code><div id="atmosphere_cloud_ice_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used.</div>
</td>
<td>kg m-2</td>
<td>clivi</td>
<td>58</td>
</tr>
<tr id="atmosphere_cloud_liquid_water_content_tr">
<td>
<a name="atmosphere_cloud_liquid_water_content"></a><img id="atmosphere_cloud_liquid_water_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_cloud_liquid_water_content')">atmosphere_cloud_liquid_water_content</a></code><div id="atmosphere_cloud_liquid_water_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used.</div>
</td>
<td>kg m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_content_of_sulfate_aerosol_tr">
<td>
<a name="atmosphere_content_of_sulfate_aerosol"></a><img id="atmosphere_content_of_sulfate_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_content_of_sulfate_aerosol')">atmosphere_content_of_sulfate_aerosol</a></code><div id="atmosphere_content_of_sulfate_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets).</div>
</td>
<td>kg m-2</td>
<td>trsult</td>
<td>
</td>
</tr>
<tr id="atmosphere_convective_mass_flux_tr">
<td>
<a name="atmosphere_convective_mass_flux"></a><img id="atmosphere_convective_mass_flux_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_convective_mass_flux')">atmosphere_convective_mass_flux</a></code><div id="atmosphere_convective_mass_flux_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The atmosphere convective mass flux is the vertical transport of mass for a field of cumulus clouds or thermals, given by the product of air density and vertical velocity. For an area-average, cell_methods should specify whether the average is over all the area or the area of updrafts only.</div>
</td>
<td>kg m-2 s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_dry_energy_content_tr">
<td>
<a name="atmosphere_dry_energy_content"></a><img id="atmosphere_dry_energy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_dry_energy_content')">atmosphere_dry_energy_content</a></code><div id="atmosphere_dry_energy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Dry energy is the sum of dry static energy and kinetic energy. Dry static energy is the sum of enthalpy and potential energy (itself the sum of gravitational and centripetal potential energy). Enthalpy can be written either as (1) CpT, where Cp is heat capacity at constant pressure, T is absolute temperature, or (2) U+pV, where U is internal energy, p is pressure and V is volume.</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_dry_static_energy_content_tr">
<td>
<a name="atmosphere_dry_static_energy_content"></a><img id="atmosphere_dry_static_energy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_dry_static_energy_content')">atmosphere_dry_static_energy_content</a></code><div id="atmosphere_dry_static_energy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Dry static energy is the sum of enthalpy and potential energy (itself the sum of gravitational and centripetal potential energy). Enthalpy can be written either as (1) CpT, where Cp is heat capacity at constant pressure, T is absolute temperature, or (2) U+pV, where U is internal energy, p is pressure and V is volume.</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_eastward_stress_due_to_gravity_wave_drag_tr">
<td>
<a name="atmosphere_eastward_stress_due_to_gravity_wave_drag"></a><img id="atmosphere_eastward_stress_due_to_gravity_wave_drag_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_eastward_stress_due_to_gravity_wave_drag')">atmosphere_eastward_stress_due_to_gravity_wave_drag</a></code><div id="atmosphere_eastward_stress_due_to_gravity_wave_drag_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Eastward" indicates a vector component which is positive when directed eastward (negative westward). Atmosphere_Xward_stress is a stress which tends to accelerate the atmosphere in direction X.</div>
</td>
<td>Pa</td>
<td>tauugwd</td>
<td>
</td>
</tr>
<tr id="atmosphere_energy_content_tr">
<td>
<a name="atmosphere_energy_content"></a><img id="atmosphere_energy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_energy_content')">atmosphere_energy_content</a></code><div id="atmosphere_energy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. "Atmosphere energy content" has not yet been precisely defined! Please express your views on this quantity on the CF email list.</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_enthalpy_content_tr">
<td>
<a name="atmosphere_enthalpy_content"></a><img id="atmosphere_enthalpy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_enthalpy_content')">atmosphere_enthalpy_content</a></code><div id="atmosphere_enthalpy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Enthalpy can be written either as (1) CpT, where Cp is heat capacity at constant pressure, T is absolute temperature, or (2) U+pV, where U is internal energy, p is pressure and V is volume.</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_heat_diffusivity_tr">
<td>
<a name="atmosphere_heat_diffusivity"></a><img id="atmosphere_heat_diffusivity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_heat_diffusivity')">atmosphere_heat_diffusivity</a></code><div id="atmosphere_heat_diffusivity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">
No help available.
</div>
</td>
<td>m2 s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_horizontal_streamfunction_tr">
<td>
<a name="atmosphere_horizontal_streamfunction"></a><img id="atmosphere_horizontal_streamfunction_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_horizontal_streamfunction')">atmosphere_horizontal_streamfunction</a></code><div id="atmosphere_horizontal_streamfunction_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Horizontal" indicates that the streamfunction applies to a horizontal velocity field on a particular vertical level.</div>
</td>
<td>m2 s-1</td>
<td>
</td>
<td>35</td>
</tr>
<tr id="atmosphere_horizontal_velocity_potential_tr">
<td>
<a name="atmosphere_horizontal_velocity_potential"></a><img id="atmosphere_horizontal_velocity_potential_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_horizontal_velocity_potential')">atmosphere_horizontal_velocity_potential</a></code><div id="atmosphere_horizontal_velocity_potential_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">A velocity is a vector quantity. "Horizontal" indicates that the velocity potential applies to a horizontal velocity field on a particular vertical level.</div>
</td>
<td>m2 s-1</td>
<td>
</td>
<td>36</td>
</tr>
<tr id="atmosphere_hybrid_height_coordinate_tr">
<td>
<a name="atmosphere_hybrid_height_coordinate"></a><img id="atmosphere_hybrid_height_coordinate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_hybrid_height_coordinate')">atmosphere_hybrid_height_coordinate</a></code><div id="atmosphere_hybrid_height_coordinate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">See Appendix D of the CF convention for information about dimensionless vertical coordinates.</div>
</td>
<td>m</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_hybrid_sigma_pressure_coordinate_tr">
<td>
<a name="atmosphere_hybrid_sigma_pressure_coordinate"></a><img id="atmosphere_hybrid_sigma_pressure_coordinate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_hybrid_sigma_pressure_coordinate')">atmosphere_hybrid_sigma_pressure_coordinate</a></code><div id="atmosphere_hybrid_sigma_pressure_coordinate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">See Appendix D of the CF convention for information about dimensionless vertical coordinates.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_kinetic_energy_content_tr">
<td>
<a name="atmosphere_kinetic_energy_content"></a><img id="atmosphere_kinetic_energy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_kinetic_energy_content')">atmosphere_kinetic_energy_content</a></code><div id="atmosphere_kinetic_energy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used.</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_ln_pressure_coordinate_tr">
<td>
<a name="atmosphere_ln_pressure_coordinate"></a><img id="atmosphere_ln_pressure_coordinate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_ln_pressure_coordinate')">atmosphere_ln_pressure_coordinate</a></code><div id="atmosphere_ln_pressure_coordinate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"ln_X" means natural logarithm of X. X must be dimensionless. See Appendix D of the CF convention for information about dimensionless vertical coordinates.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_mass_of_air_per_unit_area_tr">
<td>
<a name="atmosphere_mass_of_air_per_unit_area"></a><img id="atmosphere_mass_of_air_per_unit_area_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_mass_of_air_per_unit_area')">atmosphere_mass_of_air_per_unit_area</a></code><div id="atmosphere_mass_of_air_per_unit_area_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Mass_of_air" means the mass due solely to the gaseous constituents of the atmosphere. The standard name for the mass including precipitation and aerosol particles is atmosphere_mass_per_unit_area.</div>
</td>
<td>kg m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_mass_per_unit_area_tr">
<td>
<a name="atmosphere_mass_per_unit_area"></a><img id="atmosphere_mass_per_unit_area_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_mass_per_unit_area')">atmosphere_mass_per_unit_area</a></code><div id="atmosphere_mass_per_unit_area_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"X_area" means the horizontal area occupied by X within the grid cell.</div>
</td>
<td>kg m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_momentum_diffusivity_tr">
<td>
<a name="atmosphere_momentum_diffusivity"></a><img id="atmosphere_momentum_diffusivity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_momentum_diffusivity')">atmosphere_momentum_diffusivity</a></code><div id="atmosphere_momentum_diffusivity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">
No help available.
</div>
</td>
<td>m2 s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_net_rate_of_absorption_of_longwave_energy_tr">
<td>
<a name="atmosphere_net_rate_of_absorption_of_longwave_energy"></a><img id="atmosphere_net_rate_of_absorption_of_longwave_energy_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_net_rate_of_absorption_of_longwave_energy')">atmosphere_net_rate_of_absorption_of_longwave_energy</a></code><div id="atmosphere_net_rate_of_absorption_of_longwave_energy_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"longwave" means longwave radiation. Net absorbed radiation is the difference between absorbed and emitted radiation.</div>
</td>
<td>W m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_net_rate_of_absorption_of_shortwave_energy_tr">
<td>
<a name="atmosphere_net_rate_of_absorption_of_shortwave_energy"></a><img id="atmosphere_net_rate_of_absorption_of_shortwave_energy_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_net_rate_of_absorption_of_shortwave_energy')">atmosphere_net_rate_of_absorption_of_shortwave_energy</a></code><div id="atmosphere_net_rate_of_absorption_of_shortwave_energy_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"shortwave" means shortwave radiation. Net absorbed radiation is the difference between absorbed and emitted radiation.</div>
</td>
<td>W m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_northward_stress_due_to_gravity_wave_drag_tr">
<td>
<a name="atmosphere_northward_stress_due_to_gravity_wave_drag"></a><img id="atmosphere_northward_stress_due_to_gravity_wave_drag_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_northward_stress_due_to_gravity_wave_drag')">atmosphere_northward_stress_due_to_gravity_wave_drag</a></code><div id="atmosphere_northward_stress_due_to_gravity_wave_drag_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Northward" indicates a vector component which is positive when directed northward (negative southward). Atmosphere_Xward_stress is a stress which tends to accelerate the atmosphere in direction X.</div>
</td>
<td>Pa</td>
<td>tauvgwd</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_aerosol"></a><img id="atmosphere_optical_thickness_due_to_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_aerosol')">atmosphere_optical_thickness_due_to_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets).</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol')">atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. Black carbon aerosol is composed of elemental carbon. It is strongly light absorbing.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_dust_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_dust_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_dust_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_dust_ambient_aerosol')">atmosphere_optical_thickness_due_to_dust_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_dust_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol')">atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_particulate_organic_matter_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_pm10_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_pm10_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_pm10_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_pm10_ambient_aerosol')">atmosphere_optical_thickness_due_to_pm10_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_pm10_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. "Pm10 aerosol" is an air pollutant with an aerodynamic diameter of less than or equal to 10 micrometers.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_pm1_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_pm1_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_pm1_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_pm1_ambient_aerosol')">atmosphere_optical_thickness_due_to_pm1_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_pm1_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. "Pm1 aerosol" is an air pollutant with an aerodynamic diameter of less than or equal to 1 micrometer.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol')">atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_pm2p5_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. "Pm2p5 aerosol" is an air pollutant with an aerodynamic diameter of less than or equal to 2.5 micrometers.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol')">atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_seasalt_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "Ambient aerosol" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_optical_thickness_due_to_water_in_ambient_aerosol_tr">
<td>
<a name="atmosphere_optical_thickness_due_to_water_in_ambient_aerosol"></a><img id="atmosphere_optical_thickness_due_to_water_in_ambient_aerosol_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_optical_thickness_due_to_water_in_ambient_aerosol')">atmosphere_optical_thickness_due_to_water_in_ambient_aerosol</a></code><div id="atmosphere_optical_thickness_due_to_water_in_ambient_aerosol_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the suspended liquid or solid particles in air (except cloud droplets). "atmosphere_optical_thickness_due_to_water_in_ambient_aerosol" refers to the optical thickness due to the water that is associated with aerosol particles due to hygroscopic growth in ambient air, affecting the particle's radius and refractive index. It corresponds to the difference between the total dry aerosol optical thickness and the total ambient aerosol optical thickness.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_potential_energy_content_tr">
<td>
<a name="atmosphere_potential_energy_content"></a><img id="atmosphere_potential_energy_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_potential_energy_content')">atmosphere_potential_energy_content</a></code><div id="atmosphere_potential_energy_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Potential energy is the sum of the gravitational potential energy relative to the geoid and the centripetal potential energy. (The geopotential is the specific potential energy.)</div>
</td>
<td>J m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_relative_vorticity_tr">
<td>
<a name="atmosphere_relative_vorticity"></a><img id="atmosphere_relative_vorticity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_relative_vorticity')">atmosphere_relative_vorticity</a></code><div id="atmosphere_relative_vorticity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">Relative vorticity is the upward component of the vorticity vector i.e. the component which arises from horizontal velocity.</div>
</td>
<td>s-1</td>
<td>
</td>
<td>43 E138</td>
</tr>
<tr id="atmosphere_sigma_coordinate_tr">
<td>
<a name="atmosphere_sigma_coordinate"></a><img id="atmosphere_sigma_coordinate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_sigma_coordinate')">atmosphere_sigma_coordinate</a></code><div id="atmosphere_sigma_coordinate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">See Appendix D of the CF convention for information about dimensionless vertical coordinates.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_sleve_coordinate_tr">
<td>
<a name="atmosphere_sleve_coordinate"></a><img id="atmosphere_sleve_coordinate_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_sleve_coordinate')">atmosphere_sleve_coordinate</a></code><div id="atmosphere_sleve_coordinate_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">See Appendix D of the CF convention for information about dimensionless vertical coordinates.</div>
</td>
<td>1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_specific_convective_available_potential_energy_tr">
<td>
<a name="atmosphere_specific_convective_available_potential_energy"></a><img id="atmosphere_specific_convective_available_potential_energy_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_specific_convective_available_potential_energy')">atmosphere_specific_convective_available_potential_energy</a></code><div style="padding-left: 16px;">
<i>alias:</i> specific_convective_available_potential_energy</div>
<div id="atmosphere_specific_convective_available_potential_energy_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"specific" means per unit mass. Potential energy is the sum of the gravitational potential energy relative to the geoid and the centripetal potential energy. (The geopotential is the specific potential energy.) Convective(ly) available potential energy is often abbreviated as "CAPE".</div>
</td>
<td>J kg-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_sulfate_content_tr">
<td>
<a name="atmosphere_sulfate_content"></a><img id="atmosphere_sulfate_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_sulfate_content')">atmosphere_sulfate_content</a></code><div style="padding-left: 16px;">
<i>alias:</i> atmosphere_so4_content</div>
<div id="atmosphere_sulfate_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used.</div>
</td>
<td>kg m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_water_content_tr">
<td>
<a name="atmosphere_water_content"></a><img id="atmosphere_water_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_water_content')">atmosphere_water_content</a></code><div id="atmosphere_water_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. "Water" means water in all phases.</div>
</td>
<td>kg m-2</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="atmosphere_water_vapor_content_tr">
<td>
<a name="atmosphere_water_vapor_content"></a><img id="atmosphere_water_vapor_content_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('atmosphere_water_vapor_content')">atmosphere_water_vapor_content</a></code><div id="atmosphere_water_vapor_content_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Atmosphere water vapor content is sometimes referred to as "precipitable water", although this term does not imply the water could all be precipitated.</div>
</td>
<td>kg m-2</td>
<td>prw</td>
<td>54</td>
</tr>
<tr id="baroclinic_eastward_sea_water_velocity_tr">
<td>
<a name="baroclinic_eastward_sea_water_velocity"></a><img id="baroclinic_eastward_sea_water_velocity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('baroclinic_eastward_sea_water_velocity')">baroclinic_eastward_sea_water_velocity</a></code><div id="baroclinic_eastward_sea_water_velocity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">A velocity is a vector quantity. "Eastward" indicates a vector component which is positive when directed eastward (negative westward).</div>
</td>
<td>m s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="baroclinic_northward_sea_water_velocity_tr">
<td>
<a name="baroclinic_northward_sea_water_velocity"></a><img id="baroclinic_northward_sea_water_velocity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('baroclinic_northward_sea_water_velocity')">baroclinic_northward_sea_water_velocity</a></code><div id="baroclinic_northward_sea_water_velocity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">A velocity is a vector quantity. "Northward" indicates a vector component which is positive when directed northward (negative southward).</div>
</td>
<td>m s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="barotropic_eastward_sea_water_velocity_tr">
<td>
<a name="barotropic_eastward_sea_water_velocity"></a><img id="barotropic_eastward_sea_water_velocity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('barotropic_eastward_sea_water_velocity')">barotropic_eastward_sea_water_velocity</a></code><div id="barotropic_eastward_sea_water_velocity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">A velocity is a vector quantity. "Eastward" indicates a vector component which is positive when directed eastward (negative westward).</div>
</td>
<td>m s-1</td>
<td>
</td>
<td>
</td>
</tr>
<tr id="barotropic_northward_sea_water_velocity_tr">
<td>
<a name="barotropic_northward_sea_water_velocity"></a><img id="barotropic_northward_sea_water_velocity_arrow" src="../build/media/images/arrow_right.gif"><code class="varname"><a href="javascript:void(0)" onclick="toggleHelp('barotropic_northward_sea_water_velocity')">barotropic_northward_sea_water_velocity</a></code><div id="barotropic_northward_sea_water_velocity_help" style="display: none; padding-left: 16px; margin-top: 4px; border-top: 1px dashed #cccccc;">A velocity is a vector quantity. "Northward" indicates a vector component which is positive when directed northward (negative southward).</div>
</td>
<td>m s-1</td>
<td>