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Hello and thank you for your question. Information about the algorithm can be found in this Algorithm Theoretical Basis Document (ATBD): https://gpm.nasa.gov/resources/documents/gpm-combined-radar-radiometer-precipitation-algorithm-theoretical-basis The link to this document, along with links to oth...

Hello, The NASA GES DISC has several datasets that may be useful to you. The resources to examine are the National Climate Assessment - Land Data Assimilation System (NCA-LDAS) and Global (GLDAS) datasets. What I am going to do is provide you with search links in the Giovanni system, which will allo...

In October 2020, all 3-hourly and monthly GLDAS-2 data were post-processed with the MOD44W MODIS land mask. Previously, some grid boxes over inland water were considered as over land and, thus, had non-missing values. The post-processing corrected this issue and masked out all model output data over...

I have inquired about this question to the MERRA-2 group. They are examining it.

Giovanni was restored to full operating status yesterday afternoon (October 15).

Thank you for your message. The system is undergoing an update, and should be back to normal operation today (October 15).

Follow-up: you do not need to send the images to the Help Desk. When I save the image to my system, I can view it at full resolution.

Thank you. I will inquire to the MERRA-2 group to see if they can assist. Using Giovanni, you can make a six-month average simply by making the Begin Date January and the End Date June, when using monthly data. This will average the data over the entire period. Please do me a favor. Send your attach...

These are interesting images. Is the source of the 77% number a citation of a reduction in shipping traffic? Note that MERRA-2 is a model, not actual observational data. Determining how the algorithm generates the values of the MERRA-2 variable would require more effort. I can ask our MERRA-2 expert...

For further information, we suggest contacting Dr. Larrabee Strow at the University of Maryland - Baltimore County (UMBC).