ANALYSIS OF A HEAVY AIR POLLUTION PROCESS IN SHENYANG IN 2018

JIN Si-yu; MA Yun-feng; WANG Qi; ZHAO Di; WANG Mai-bo; LIU Qi-yao

doi:10.13205/j.hjgc.202103017

Volume 39 Issue 3

Jul. 2021

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JIN Si-yu, MA Yun-feng, WANG Qi, ZHAO Di, WANG Mai-bo, LIU Qi-yao. ANALYSIS OF A HEAVY AIR POLLUTION PROCESS IN SHENYANG IN 2018[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 120-129. doi: 10.13205/j.hjgc.202103017

Citation:

JIN Si-yu, MA Yun-feng, WANG Qi, ZHAO Di, WANG Mai-bo, LIU Qi-yao. ANALYSIS OF A HEAVY AIR POLLUTION PROCESS IN SHENYANG IN 2018[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 120-129. doi: 10.13205/j.hjgc.202103017

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ANALYSIS OF A HEAVY AIR POLLUTION PROCESS IN SHENYANG IN 2018

doi: 10.13205/j.hjgc.202103017

1. School of Energy and Environment, Shenyang Aerospace University, Shenyang 110131, China;
2. Liaoning University of Technology, Jinzhou 121001, China;
3. Shenyang Academy of Environmental Sciences, Shenyang 110167, China

Received Date: 2020-04-16
Available Online: 2021-07-19

Abstract

Abstract

The meteorological conditions, weather situation and potential sources of a heavy pollution process that occurred in Shenyang from January to March 2018 were analyzed by combining numerical model and observation data. The results showed that the heavy pollution process was closely related to the local meteorological conditions. The concentration of PM_2.5 and PM₁₀ during the heavy pollution period in Shenyang had a negative correlation with wind speed and temperature. During heavy pollution, northeast wind and northeast wind prevail, and the wind speed was relatively low, which had a positive correlation with air pressure and relative humidity. Moderate, severe and above polluting weather was mainly concentrated in the weather with relative humidity between 50% and 70%; while heavy pollution mainly under the weather conditions of high pressure, high humidity, low wind speed, and near-surface temperature inversion, pollutants were not easy to spread; if there was warm advection at high altitude, the influence of warm advection after the front ridge of the trough would also cause regional air quality to decline. There were 4 transportation routes in the air mass in Shenyang:cluster 1 in the north-northwest direction accounted for 30.28% of the total trajectory; cluster 2 in the northwest direction accounted for 34.72%, compared with 21.94% of cluster 3, and 13.06% of cluster 4; the trajectory from Inner Mongolia carried a large amount of PM₁₀. The central and eastern Inner Mongolia Autonomous Region (cluster 2), Hebei province (cluster 3) and the western Jilin province (cluster 4) had a relatively higher contribution to the pollution in Shenyang.
- heavy pollution,
- WRF,
- trajectory clustering,
- potential source area

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References(35)

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