Variation of NO2 in Winter in Huaibei Based on Ground-Based MAX-DOAS Observation

Abstract

Abstract: Based on the observation data of solar scattering spectrum obtained by the multi-axis differential absorption
spectroscopy (MAX-DOAS) in Huaibei area, China, from December 8 to December 31, 2018, the tropospheric NO2 vertical column
density was retrieved, and the diurnal variation of NO2 concentration under different weather conditions
in winter was analyzed. It is found that the high NO2 concentration occurrs in the period from
December 18 to December 27, and the maximum daily average value appears on December 27, which is
about 2.9 times of the lowest daily average. Combined with the wind field trajectory model, the wind
field under different atmospheric conditions was studied. It is found that the northerly wind
field is mainly in the period of low NO2 concentration, and the southerly wind field
increases when NO2 concentration is high, which means that the pollution generated in
the urban area is transported to the observation area. Moreover, the results of MAX-DOAS
were compared with those of OMI satellite results, and it is found the two results show good consistency (R²=0.88).

Key words: , multi-axis differential optical absorption spectroscopy, NO2 vertical column density, variation ,
characteristics, contrastive analysis

CLC Number:

X831

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