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MERRA-2 does not provide total surface Particulate Matter (PM) mass concentration, such as PM1, PM2.5, and PM10, in any collections. It does, however, provide individual species, e.g., sulfate, organic matter, black carbon, dust, and sea salt PM2.5 concentrations in the hourly collection M2T1NXAER_5...

MERRA-2 was run in four production streams. Each of the streams covers an approximately 10-year period. The fourth stream begins on 1 January 2011. Note that the filename prefix was changed if a data file was reprocessed. Click HERE to view the records of MERRA-2 reprocessed data and how the filena...

MERRA-2 and MERRA data granules will show an increment in the stream number if the data granule has been reprocessed. Reprocessing dates and reasons why are document in the links below: Records of MERRA-2 Data Reprocessing Records of MERRA Data Reprocessing For more information about the MERRA-2 fil...

Hello,

We provided an answer to a similar query which you said had been resolved; does that apply to this post as well? It was discovered in a review of Earthdata Forum posts that had not yet received a reply.

Excellent. I am glad that the instructions were both useful and correct.

Hello, I apologize for our slow response. We are examining your query now.

Hello, I would recommend starting with our Giovanni system. Giovanni has both tropospheric and total column NO2 at 0.25 deg resolution. Use this link to access these data variables: OMI NO2 in Giovanni . You can create a bounding box using latitude and longitude coordinates for the corners, and you ...

Many of these data variables are available in the Giovanni system, https://giovanni.gsfc.nasa.gov/ . Time-series can be created for specific regions using a bounding box; shapefiles are available for countries. Time-series data can be downloaded as CSV. If you create maps with Giovanni, the maps can...