TIAN Chunyan,ZHOU Huixian,SHEN Ao,et al.Numerical simulations of transport characteristics of moderate-to-severe haze pollution in Shenzhen, China[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):38-47.
TIAN Chunyan,ZHOU Huixian,SHEN Ao,et al.Numerical simulations of transport characteristics of moderate-to-severe haze pollution in Shenzhen, China[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):38-47. DOI: 10.13471/j.cnki.acta.snus.2020D057.
Numerical simulations of transport characteristics of moderate-to-severe haze pollution in Shenzhen, China
Based on the analysis of weather of the moderate-to-severe haze pollution incidents in Shenzhen from 2008 to 2018, the WRF-Chem model and sensitivity tests were used to quantify the contribution of anthropogenic emission sources from Shenzhen and its surrounding cities (Guangzhou,Dongguan, and Huizhou) to the hazing process in Shenzhen using sensitivity tests, and to reveal the main transport characteristics of the hazing pollution process in the area. The main weather types affecting the process of moderate-to-severe haze pollution in Shenzhen are typhoon peripheral circulation pattern and Continental high (ridge) type, in which Continental high (ridge) type, can be further subdivided into three different types according to the wind field (north-east wind type, wind direction variable type, southerly wind type). The sensitivity tests of typical pollution cases show that under the typhoon peripheral circulation pattern during hazing pollution process, the local contribution rate of Shenzhen was 40.38%, and the total contribution rate of the surrounding cities was 22.6%. For the three types of Continental high (ridge) pollution processes, Shenzhen's local contribution rates were 21.12%, 53.92%, and 55.41%, while the total contribution rates of the surrounding cities were 6.88%, 10.97%, and 3.44%, respectively. Wind speed and orientation have the most significant impact on transport characteristics. When the wind speed was 3 to 4 m/s, the contribution rate of Shenzhen local sources can reach 50%. When the wind speed was about 6 m/s, the contribution rate of transmission increased significantly while the local contribution rate decreased to 20% to 40%. The contribution of different cities was affected by wind directions. While the dominated wind field of typhoon peripheral circulation pattern haze was mostly northwest, Dongguan and Huizhou's contribution differed, with 15.03% and 1.77%, respectively. In other scenarios, the contributions of these two cities were more consistent, about 1% to 5%. Guangzhou’s contribution to Shenzhen can reach 5.8% with the northwest winds caused by the Typhoon peripheral circulation pattern.
关键词
中重度霾污染输送特征台风外围环流型大陆高压(脊)型深圳
Keywords
moderate-to-severe haze pollutiontransport characteristicstyphoon peripheral circulation patterncontinental high (ridge) typeShenzhen
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