HUANG Shuyuan, LI Nan, HE Sicong, DONG Heng

(School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China)

Abstract: Based on the Ozone Monitoring Instrument (OMI) remote sensing data, the formaldehyde column concentrations were obtained to study the spatial and temporal distributions and influencing factors of formaldehyde in the three Provinces (Heilongjiang, Jilin, and Liaoning) of Northeast China during 2005~2018. The results showed that in recent 14 years, the average annual column concentration of formaldehyde in the three Provinces of Northeast China increased first, then decreased, and then increased again, with the maximum growth rate of 14.3% and the maximum reduction rate of 10.1%.The monthly and seasonal mean column concentration of formaldehyde showed obvious changes, with the highest value in Summer (June to August) and the lowest value in March of Winter. The average seasonal column concentration of formaldehyde decreased in the order of Summer > Autumn > Winter > Spring; The concentration of formaldehyde column in the three Provinces of Northeast China is high in the South and low in the North, and higher in the central and developed zone. Both natural conditions and human activities influenced the concentration of formaldehyde. Meteorological factors such as precipitation and temperature are important factors influencing the change of formaldehyde column concentration, while natural factors such as terrain and vegetation have a certain influence on the distribution of formaldehyde. Human activities, such as transportation and industrial production, also contribute significantly to the regional variations of formaldehyde concentrations.

Keywords: OMI data; HCHO; the three Provinces of Northeast China; temporal and spatial variation; impact factor

EARTH AND ENVIRONMENT Vol.48, No.6, Tot No.338, 2020, Page 652-662