Abstract
Using data from the OMI (Aura) satellite instrument, the changes in the atmospheric contents of formaldehyde (CH 2 O) and nitrogen dioxide (NO 2 ), associated with the extreme summer heat waves and wildfires in European Russia (ER) in 2010 and in Western Siberia (WS) in 2012 were investigated. Marked increase of the regional CH 2 O contents, up to 1.7⋅10 16 molec/cm 2 over ER (an increase by 72%) and up to 1.4⋅10 16 molec/cm 2 over WS (55%), was revealed. The regional CH 2 O contents positively correlate with the number of active fires in ER and WS, and also with the surface temperature. The regional NO 2 contents have slightly increased during the wildfires - up to 1.4⋅10 15 molec/cm 2 (4%) over ER and up to 1.0 ⋅10 15 molec/cm 2 (6%) over WS, however over the clusters of intense fires the growth in tropospheric NO 2 in separate days reached tens percent.
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