Where is the Variables of time in the LV3 Chlorophyll data from MODIS-aqua?

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zhr9709
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Where is the Variables of time in the LV3 Chlorophyll data from MODIS-aqua?

by zhr9709 » Thu Oct 27, 2022 3:38 am America/New_York

Hello everyone!
When I try to use the lv3 Chlorophyll data from MODIS-aqua for the DINEOF in matlab, I find that there is no 'time' variables like 'lat' and 'lon' in the monthly data, so the matrix of my data is 312X264,but I thought it should be 312X264X30, because it is monthly data. Is there any solution for this situation?

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OB SeaDAS - dshea
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Re: Where is the Variables of time in the LV3 Chlorophyll data from MODIS-aqua?

by OB SeaDAS - dshea » Thu Oct 27, 2022 9:57 am America/New_York

Monthly data has the days averaged. If you want every day then grab the daily files.

don

zhr9709
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Re: Where is the Variables of time in the LV3 Chlorophyll data from MODIS-aqua?

by zhr9709 » Fri Oct 28, 2022 12:18 am America/New_York

Thank you for the reply.

You mean if I want to get the 312X264X30 chla data, I need to download the daily data and then merge them as a monthly data. Is it correct?

gnwiii
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Re: Where is the Variables of time in the LV3 Chlorophyll data from MODIS-aqua?

by gnwiii » Fri Oct 28, 2022 11:08 am America/New_York

It is worth mentioning that the Climate Data Operators (https://code.mpimet.mpg.de/projects/cdo) allow you to add time to OBPG netcdf level-3 files and merge them into a single file in batch processing. CDO is available on Windows using Cygwin64, from anaconda.org for linux and macOS, and as packages from some linux distributions.

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