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Missing data in chl.nc at 0.25° and 0.1° #273
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The origin and history of these files is unclear to me. Can anyone (@russfiedler @PaulSpence) suggest where they came from? |
The metadata doesn't reveal much. They were last modified in 2017, 2011, 2013 (1°, 0.25°, 0.1°, respectively). The 0.25° seems to be derived from I had some guesswork in sec 3.5 of the draft tech report
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This looks like it was made from a remote sensing product, e.g. SeaWifs as suggested and the gaps could be where the sensor is blocked by clouds / ice / lack of sunlight. Chlorohpyl relies on optical (possibly infrared) remote sensing. But as the NaNs are reliatively uniform its more likely some sort of reprojection / regrid / mask error? We could make a new climatology, Ocean Colour V6 might be a good product to choose, (I think they claim 5km resolution) and it should have a longer timeframe for data (1997-2024 or so) |
Martin says
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The 0.25° and 0.1°
chl.nc
chlorophyll input files are missing data at in the far north and south (the 1° data looks OK). This will alter the depth range over which shortwave radiation heats the ocean. Hopefully this isn't upsetting the bottom water formation?Screenshots below are
Thanks to Yinghuan Xie for alerting me to this issue.
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