"SO2 Column Amount (Planetary Boundary Layer) "

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"SO2 Column Amount (Planetary Boundary Layer) "

by EarthdataForumContributor » Tue Apr 07, 2020 11:32 am America/New_York

I am using the "SO2 Column Amount (Planetary Boundary Layer) OMSO2e v003 (OMSO2e v003)" product for my research work but I am finding some problem in the range of this product, it has ranged from negative which is confusing for me. How the value of sulphur dioxide at any point is negative?


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Re: "SO2 Column Amount (Planetary Boundary Layer) "

by mgreene » Tue Apr 07, 2020 11:33 am America/New_York

In regards to your request, the negative SO2 values are artifacts of the retrieval process. They are
usually associated with retrievals over highly reflective surfaces. The
OMSO2.003 readme has more detail than is contained in the OMSO2e readme:

https://aura.gesdisc.eosdis.nasa.gov/da ... me_V2.pdf

The OMSO2e (Level 3) is aggregated from the Level 2 product so the negative
values remain. While negative values are not physically real, the measurements
are still valid and should not be discarded.

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