Stable and transport indices applied to winter air pollution over the Yangtze River Delta, China

Liu，Xiaohui1; Zhu，Bin1; Kang，Hanqing1; Hou，Xuewei1; Gao，Jinhui2; Kuang，Xiang1; Yan，Shuqi1; Shi，Shuangshuang1; Fang，Chenwei1; Pan，Chen3,4; Meng，Kai5

2020

10.1016/j.envpol.2020.115954

ENVIRONMENTAL POLLUTION   影响因子和分区

0269-7491

1873-6424

Previous studies have developed a stable weather index (SWI) based on meteorological elements that adequately represent PM pollution over the North China Plain (NCP). However, the SWI performs poorly over the Yangtze River Delta (YRD) region because air pollution over this region is affected not only by stagnant weather (STAG) but also by transport (TRANS). For example, air pollutants can be transported from the NCP to the YRD by cold fronts. In this study, an obliquely rotated principal component analysis in the T-model is applied to classify the synoptic patterns of winter weather over the YRD region from 2013 to 2018. Among the four identified synoptic patterns, two of which cause TRANS, one pattern is most likely to cause STAG, and one pattern can lead to either STAG or TRANS depending on the location of high pressure around Shandong province. Due to the large contribution (63%) of TRANS to the total PM pollution events, a transport pollution index (TPI) is constructed to describe the transport features of PM pollution over the YRD region. Our results show that, when considering the SWI alone, the correlation coefficients between the SWI and ln(PM) range from 0.50 to 0.57 in the main cities of the YRD. Excitingly, when considering both the TPI and SWI (TPI+SWI), the correlation coefficients increase significantly to 0.63–0.78, suggesting that TPI+SWI better reflects the wintertime PM pollution level over the YRD region. In addition, satisfactory performance in validation also suggests that TPI+SWI can increase the accuracy of evaluating and forecasting of PM pollution episodes over regions downstream of source emissions.

Meteorological conditions Stable weather index Transport pollution index Yangtze River Delta

EI ; SCI

英语

其他

National Key Research and Development Program[2016YFA0602003] ; Postgraduate Research and Practice Innovation of Jiangsu Province Program[SJKY19_0942] ; National Natural Science Foundation of China[41905114,91544229,41805120] ; Natural Science Foundation of Hebei Province[D2020304038] ; Scientific Research Project of Hebei Meteorological Bureau[19ky07]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000615555000025

ELSEVIER SCI LTD

20204709521523

Rivers ; Air pollution ; Atmospheric movements ; River pollution

Atmospheric Properties:443.1 ; Air Pollution:451 ; Water Pollution:453 ; Mathematical Statistics:922.2

ENVIRONMENT/ECOLOGY

2-s2.0-85096379491

Scopus

1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science & Technology,Key Laboratory of Meteorological Disaster,Ministry of Education (KLME),Nanjing University of Information Science & Technology,Joint International Research Laboratory of Climate and Environment Change (ILCEC),Nanjing University of Information Science & Technology,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science & Technology,Nanjing,210044,China
2.Department of Ocean Sciences and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Jiangsu Meteorological Observatory,Nanjing,210008,China
4.Key Laboratory of Transportation Meteorology,China Meteorological Administration (LATM-CMA),Nanjing,210009,China
5.Hebei Provincial Environmental Meteorological Center,Shijiazhuang,050021,China

Liu，Xiaohui,Zhu，Bin,Kang，Hanqing,et al. Stable and transport indices applied to winter air pollution over the Yangtze River Delta, China[J]. ENVIRONMENTAL POLLUTION,2020,272.

Liu，Xiaohui.,Zhu，Bin.,Kang，Hanqing.,Hou，Xuewei.,Gao，Jinhui.,...&Meng，Kai.(2020).Stable and transport indices applied to winter air pollution over the Yangtze River Delta, China.ENVIRONMENTAL POLLUTION,272.

Liu，Xiaohui,et al."Stable and transport indices applied to winter air pollution over the Yangtze River Delta, China".ENVIRONMENTAL POLLUTION 272(2020).