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I apologize for the delay in this reply, as we have considered various causes of negative values in the data retrieval. Assuming the negative values aren't coming from fill values, they are not that uncommon, and can arise for a number of reasons. E.g. the atmosphere modelled is not a good represent...

Hello, We will have our MERRA-2 staff examine your question; however, you appear to be doing the calculation correctly. The conversion for kg to μg (micrograms) is 10^9. So, multiplying your value (rounded) of 4.6e-8 kg / m^3 by 10^9 gives a value of 45, which is in the range you were expecting. The...

Hello,

What type of data are you seeking regarding the mangroves?

That's very strange. When I click on the link, it provides a pop-up asking for permission to go to an external site, then when I say OK, it goes to Giovanni. Perhaps you have a pop-up blocker that is interfering with the pop-up? You can copy https://giovanni.gsfc.nasa.gov into your browser search wi...

I am sorry, I misconfigured the link. This is correct: https://giovanni.gsfc.nasa.gov

Hello. We have had a productive discussion about your question. The following combines the comments from several data experts. Also, see the associated image below. For more AIRS questions, you can also go here: Ask AIRS The missing data over north-Europe and north-Canada in the figures you show is ...

As you stated you are a beginner, I would recommend trying our Giovanni data system, https://giovanni.gsfc.nasa.gov/ , which has all of the data variables for which you noted you want to calculate regional distributions. Giovanni makes this easy to do, as you can select a region and variable, and ma...

Hello.

If you can provide a more detailed description of what you are attempting to calculate, we may be able to advise you and provide contacts with the relevant MERRA-2 scientists and developers. Reading your post, I am not clear on what you mean by "synthesize".

Thank you for this information. We are working on your query now.

Hello again,

Can you inform us where you acquired this data product?