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The document Supplemental Documentation for GEOS Aerosol Products ( https://gmao.gsfc.nasa.gov/pubs/docs/Collow1489.pdf ) discusses MERRA-2 aerosol formulation through the more recent systems. Section 4 discusses the optical properties, and a NetCDF File ( https://portal.nccs.nasa.gov/datashare/iesa...

Hi -- I'm going to comment on your post and suggest that you can use our Giovanni tool, https://giovanni.gsfc.nasa.gov/ for your project. The parameters of the project are somewhat vague; is this about any 6-week period in the year, or a specific 6-week period? The spring season in the North Atlanti...

For crop cultivation a useful term to compute is the vapor pressure deficit ([url=ttps://en.wikipedia.org/wiki/Vapour-pressure_deficit]https://en.wikipedia.org/wiki/Vapour-pressure_deficit[/url]). The simplest way to calculate the vapor pressure deficit is to use the relative humidity and temperatur...

Regarding your question regarding appropriate humidity and soil moisture levels for crop cultivation, this is a complex question to answer, as there are many different types of crops which have different optimum conditions for their cultivation. Growing conditions and growing seasons for crops vary ...

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Yes Earthdata Granules can be downloaded in parallel, but concurrent connections must be limited to no more than three. You may experience a "Concurrent Connection Limit Reached" error if you exceed three concurrent connections. When using curl , the following flags will only use a maximum...

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This is a notification of a significant change to the Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) observing system. As of June 16, 2025, MERRA-2 no longer assimilates AMSU-A radiances from NOAA-15, NOAA-18 , and NOAA-19, all of which have been decommissioned b...

Hello, I believe this message indicates you have approved the application. Please see if you can now login at the GES DISC homepage ( https://disc.gsfc.nasa.gov ) with your Earthdata login. If so, it should now be possible for you to access and download data from the archive. Please reply if additio...