Effect of rainfall-induced diabatic heating over southern China on the formation of wintertime haze  on the North China Plain

An, Xiadong; Sheng, Lifang; Li, Chun; Chen, Wen; Tang, Yulian; Huangfu, Jingliang

doi:https://doi.org/10.5194/acp-22-725-2022

Articles | Volume 22, issue 2

https://doi.org/10.5194/acp-22-725-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-725-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 2

Research article

|

18 Jan 2022

Research article |

| 18 Jan 2022

Effect of rainfall-induced diabatic heating over southern China on the formation of wintertime haze on the North China Plain

Xiadong An, Lifang Sheng, Chun Li, Wen Chen, Yulian Tang, and Jingliang Huangfu

Data sets

China ground observation data sets China Meteorological Administration (CMA) http://data.cma.cn/

NCEP/NCAR Reanalysis data sets NCEP/NCAR http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html

Constructing a spatiotemporally coherent long-term PM2.5 concentration dataset over China during 1980-2019 using a machine learning approach (Version 1) Y. Yang https://doi.org/10.5281/zenodo.4293239

Short summary

The North China Plain (NCP) suffered many periods of haze in winter during 1985–2015, related to the rainfall-induced diabatic heating over southern China. The haze over the NCP is modulated by an anomalous anticyclone caused by the Rossby wave and a north–south circulation (NSC) induced mainly by diabatic heating. As a Rossby wave source, rainfall-induced diabatic heating supports waves and finally strengthens the anticyclone over the NCP. These changes favor haze over the NCP.