Code for: Mace, G. G., Benson, S., Humphries, R., Gombert P. M., Sterner, E.: Natural marine cloud brightening in the Southern Ocean, Atmospheric Chemistry and Physics, Accepted 22 Nov 2022
Please contact Sally Benson at [email protected] with any questions about the code.
Step 1: Aquire MOD03 and MOD06_L2 MODIS data, MODIS Ocean Color Level-3 mapped chlor-a, and CERES SSF Edition4A
MODIS Characterization Support Team (MCST), 2017. MODIS Geolocation Fields Product. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi.org/10.5067/MODIS/MOD03.061 https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MOD03
Platnick, S., Ackerman, S., King, M., et al., 2015. MODIS Atmosphere L2 Cloud Product (06_L2). NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi.org/10.5067/MODIS/MOD06_L2.061 https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MOD06_L2#product-information
MODIS Ocean Color Level-3 Mapped 8day at 4km AQUA_MODIS.20180101_20180108.L3m.8D.CHL.chlor_a.4km.nc https://oceandata.sci.gsfc.nasa.gov/api/file_search/ NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group. Moderate-resolution Imaging Spectroradiometer (MODIS) Aqua Chlorophyll Data; 2022 Reprocessing. NASA OB.DAAC, Greenbelt, MD, USA. doi: 10.5067/AQUA/MODIS/L3M/CHL/2022.
CERES Single Scanner Footprint (SSF) TOA/Surface Fluxes, Clouds and Aerosols Edition 4A CER_SSF_Aqua-FM3-MODIS_Edition4A_400403.2014013104.hdf NASA/LARC/SD/ASDC. (2014). CERES Single Scanner Footprint (SSF) TOA/Surface Fluxes, Clouds and Aerosols Aqua-FM3 Edition4A [Data set]. NASA Langley Atmospheric Science Data Center DAAC. Retrieved from https://doi.org/10.5067/AQUA/CERES/SSF-FM3_L2.004A
Step 2: Create netcdf files of the modis data within each 1x2 degree gridbox of the modis granule.
These netcdf files will be called histogram files. Run the IDL code read_mod06_clouds_sb_test.pro Output filename example: MYD06_L2.A2018027.1320.061.2018030175749_lat_-62_lon_16_histo.cdf
Step 3: Append chlor-a variable to each histogram file.
Run the IDL code match_ocean_histo.pro
Step 4: Append CERES sw albedo to each histogram file.
Run the IDL code read_ceres_ssf.pro
Step 5: Accumulate all the histogram files for each month into one big monthly historgram file.
This makes the data easier to work with because IDL doesn't have to open and close so many files. Run the IDL code plot_modis_histograms.pro This code normalizes the short wave albedo to 45 degree solar zenith angle
Step 6: Create monthly mean values.
Run the IDL code plot_modis_hist_daily_monthly_means.pro
Step 7: Create other plots.
Run the IDL code plot_modis_hist_full_dataset.pro