Seasonal variation of total column formaldehyde, nitrogen dioxide, and ozone over various Pandora spectrometer sites with a comparison of OMI and diurnally varying DSCOVR-EPIC satellite data

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Observations reveal seasonal dependence of formaldehyde and ozone over various sites, highlighting differences in measurement methods.

Pandora instruments show strong seasonal dependence for formaldehyde and ozone, while nitrogen dioxide reflects less variation.
OMI underestimates nitrogen dioxide pollution daily, particularly at urban sites, compared to ground-based Pandora measurements.
Seasonal behavior of formaldehyde largely results from plant growth and lake emissions peaking in summer, as shown by observations.
Comparative analysis indicates good agreement for ozone while revealing discrepancies in nitrogen dioxide and formaldehyde measurements.

Herman et al. (2025) studied this question.

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