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Hello, The equation for PM2.5 is the same as what we have posted on our FAQ page, so that is correct. (https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/FAQ/) I think this should work equally well for 1 hourly or 1 monthly calculations. As to why “the pixel size of the original five parameters (dusmass2...

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Hello, The best that we can do is PARDR+NIRDR to get direct radiation that is missing a part in the UV, the model developer I asked says that this should be ~96% of the direct SW radiation PARDR is in tavg1_2d_lfo_Nx (M2T1NXLFO): Land Surface Forcings NIRDR is in tavg1_2d_flx_Nx (M2T1NXFLX): Surface...

The equation for PM2.5 is the same as what we have posted on our FAQ page, so that is correct. (https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/FAQ/) I think this should work equally well for 1 hourly or 1 monthly calculations. As to why “the pixel size of the original five parameters (dusmass25/ocsma...

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Yes, regarding the inquiry about remote accessing MERRA-2 data. ---------------------------------- We do provide options for remote accessing MERRA-2 data. 1) AWS cloud: MERRA-2 collections have been migrated to the AWS cloud US-west-2 region. So you are in the US-west-2 region, you can access S3 bu...

Please take a look at the following How-to's. The 'requests' section of this how-to demonstrates downloading granules with requests: https://disc.gsfc.nasa.gov/information/howto?keywords=requests&title=How%20to%20Access%20GES%20DISC%20Data%20Using%20Python However, the 401 error is most likely c...

There has been a period of recent netCDF software releases that are not working well with OPeNDAP. These are the buggy versions of the python packages: libnetcdf 4.9.2 netcdf4 1.6.4 I am able to open the URL with xarray: ds=xarray.open_dataset(https://hydro1.gesdisc.eosdis.nasa.gov/dods/NLDAS_NOAH01...

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