Extracting surface level data from TROPOMI Tropospheric column using HARP

[sander.niemeijer]

There is unfortunately no easy way to do this.
See also similar posts:

Convert the unit from molecules/m^2 to ppm

This is an inherent limitation of the way the satellite can measure the atmosphere. You won’t be able to retrieve parts of a vertical column. See also this earlier comment. The way the S5P NO2 L2 product is able to split a total column in a tropospheric and stratospheric column is already quite an achievement (and requires the use of an atmospheric model to achieve it).

and:

Derive PPB/PPM of tropospheric NO2

Good morning D, There is no basic knowledge unless you have mastered it first! So don’t worry at all about asking questions, this forum is the best place for it, no judgements and Sander is excellent in replying to all bizarre questions we pose him. I think there is a slight confusion with the units in your question. You mention the question I posed here, S5P CH4 | Column ppb to column number density mol/m2 conversion, which however relates to how the CH4 product is being retrieved from the da…