Earthdata Forum

hello
I need the data of the total column of NO2 between 2007 and 2019 obtained by the OMI, for a city in Portugal. How do I proceed to acquire this data?
thanks

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 can specify the time range to create a time-series (note the plot options at top left). The time-series values can be downloaded as CSV or netCDF.

The GES DISC also provides a subsetting service that operates on Level 2 data (Giovanni uses Level 3 data). The subsetting service can thus provide data at higher spatial resolution than Giovanni, but the data would require additional processing steps after it is downloaded to extract the data values of interest. Click on this link to access the data products and subsetting service: OMI NO2 data at GES DISC.

Please reply for additional assistance, if necessary.