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One followup question: if you downloaded a subsetted file in netCDF format, do you have a way to convert that to GeoTIFF? If so, we can examine the error closely and attempt to determine why the spatial subsetting did not work. If you do not have a way to convert netCDF files to GeoTIFF, then findin...

Daniel, Hello. We have examined our servers and have determined that the only way you can get GeoTIFF subset files for the data you are seeking is to use Giovanni. The data products and values will be the same; however, our OPeNDAP server is not set up to provide spatial subsetted data as GeoTIFF. W...

From our DISC science support staff: I can get V50M in the subsetted file by repeating the selections you listed, i.e., Dataset: MERRA-2 inst1_2d_asm_Nx: 2d,1-Hourly,Instantaneous,Single-Level,Assimilation,Single-Level Diagnostics V5.12.4 Download Method: Get File Subsets using the GES DISC Subsette...

Hello,

We are examining your issue now; we will provide a reply as soon as we have determined if the data is available.

Hello, we will need additional information from you to diagnose this issue. Please contact the GES DISC Help Desk. See our "Contact Us" page for information on what to include in your message. Thank you. https://disc.gsfc.nasa.gov/information/documents?title=Contact%20Us

If you have not done so already, please re-attempt your data access and download query, as we believe the issue you encountered has been resolved.

Hello. I apologize for the delay in replying due to the holiday weekend.

Please indicate the variable you are attempting to download so we can attempt to simulate the issue and determine how to resolve it.

Hello, That's a good question, and there is no simple answer. It is very location-dependent. For urban areas in general, most of the NO2 would be attributable to transportation. Areas that are downwind of fossil-fuel burning power generation plants may have NO2 from multiple sources, if they are nea...

Dear Lorenzo Vergni,

I have submitted your question to our data access / download experts, and they are formulating a response.

The best place to search for these data types is the Physical Oceanography DAAC (PODAAC). The PODAAC operates a user forum where you can submit your query.