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Atmosphere 2018, 9(8), 314; https://doi.org/10.3390/atmos9080314

Variations of Haze Pollution in China Modulated by Thermal Forcing of the Western Pacific Warm Pool

1
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Science Information & Technology, Nanjing 210044, China
2
Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, College of Atmospheric Science, Nanjing University of Science Information & Technology, Nanjing 210044, China
3
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
4
Institute of Atmospheric Composition/Key Laboratory of Atmospheric Chemistry of China Meteorological Administration (CMA), Chinese Academy of Meteorological Sciences, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Received: 1 July 2018 / Revised: 8 August 2018 / Accepted: 9 August 2018 / Published: 11 August 2018
(This article belongs to the Special Issue Air Quality in China: Past, Present and Future)
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Abstract

In addition to the impact of pollutant emissions, haze pollution is connected with meteorology and climate change. Based on the interannual change analyses of meteorological and environmental observation data from 1981 to 2010, we studied the relationship between the winter haze frequency in central-eastern China (CEC) and the interannual variations of sea surface temperature (SST) over Western Pacific Warm Pool (WPWP) and its underlying mechanism to explore the thermal effect of WPWP on haze pollution variation in China. The results show a significant positive correlation coefficient reaching up to 0.61 between the interannual variations of SST in WPWP and haze pollution frequency in the CEC region over 1981–2010, reflecting the WPWP’s thermal forcing exerting an important impact on haze variation in China. The anomalies of thermal forcing of WPWP could induce to the changes of East Asian winter monsoonal winds and the vertical thermal structures in the troposphere over the CEC region. In the winter with anomalously warm SST over the WPWP, the near-surface winds were declined, and vertical thermal structure in the lower troposphere tended to be stable over the CEC-region, which could be conducive to air pollutant accumulation leading to the more frequent haze occurrences especially the heavy haze regions of Yangtze River Delta (YRD) and Pearl River Delta (PRD); In the winter with the anomalously cold WPWP, it is only the reverse of warm WPWP with the stronger East Asian winter monsoonal winds and the unstable thermal structure in the lower troposphere, which could attribute to the less frequent haze pollution over the CEC region. Our study revealed that the thermal forcing of the WPWP could have a modulation on air environment change in China. View Full-Text
Keywords: haze pollution; interannual variation; sea surface temperature; Western Pacific Warm Pool haze pollution; interannual variation; sea surface temperature; Western Pacific Warm Pool
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You, Y.; Cheng, X.; Zhao, T.; Xu, X.; Gong, S.; Zhang, X.; Zheng, Y.; Che, H.; Yu, C.; Chang, J.; Ma, G.; Wu, M. Variations of Haze Pollution in China Modulated by Thermal Forcing of the Western Pacific Warm Pool. Atmosphere 2018, 9, 314.

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