by Chongyang Kang, Xiaofang Yang, Zhuoying He, Kedi Mi, Jie Hu, Xiaorong Yu
2025,12(1);
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Abstract
Sulfur dioxide(SO2) is an important pollutant gas that affects environment of our lives. Although we
had made lots of detections, but still can not receive the distribution of SO2 in the world. Compared with great
success in UV-vis spectrometers from remote sensing in OMI and OMPS, can provide SO2 data in a huge range
and daily, but cannot receive data as there is no sunshine, this is difficult for researchers to do their study in global
or area in high latitudes. In this paper, we tried to supplement the PBL SO2 in the whole world, based on the data
of OMISO2, by the function derivative algorithm to segment approximation, and verified the method in the area,
where OMI SO2 data are complete. The results show that the spatial distribution of SO2 in the global atmospheric
boundary layer is obviously latitudinal zonality. SO2 columns and its variation trend are the same or similar in
the same latitude during the year. Through verification we found that the partition below 5° latitude seldom affect
the estimation, The accuracy is good in the region where there is no SO2 columns mutation, more than 90% of
the grids which differences between the estimation and the truth are in a range of [-0.2DU, 0.2DU], less than the
multi-day OMI monthly error of 0.2DU, the function is suitable in this situation, and the estimation will be biased
in the region where the volcanic eruption, causes the monthly average SO2 columns mutation, but choosing data
from the month nearby with no volcanic eruption can helps to eliminate the effects of volcanic eruptions and also
can estimate the areas affected by volcanic eruptions.
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