Preprints
https://doi.org/10.5194/acp-2021-1095
https://doi.org/10.5194/acp-2021-1095

  05 Jan 2022

05 Jan 2022

Review status: this preprint is currently under review for the journal ACP.

Joint Occurrence of Heatwaves and Ozone Pollution and Increased Health Risks in Beijing, China: Roles of Synoptic Weather Pattern and Urbanization

Lian Zong1, Yuanjian Yang1, Haiyun Xia1, Meng Gao2, Zhaobin Sun3, Zuofang Zheng3, Xianxiang Li4, Guicai Ning5, Yubin Li1, and Simone Lolli6 Lian Zong et al.
  • 1Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud- Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing, China
  • 2Department of Geography, Hong Kong Baptist University, Hong Kong, China
  • 3Institute of Urban Meteorology, China Meteorological Administration, Beijing, China
  • 4School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, China
  • 5Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China
  • 6CNR-IMAA, Contrada S. Loja, 85050 Tito Scalo (PZ), Italy

Abstract. Heatwaves (HWs) paired with higher ozone (O3) concentration at surface level pose a serious threat to human health. Their combined modulation of synoptic patterns and urbanization remains unclear. By using five years of summertime temperature and O3 concentrations observation in Beijing, this study explored potential drivers of compound HWs and O3 pollution events. Three unfavourable synoptic weather patterns were identified to dominate the compound HWs and O3 pollution events. The weather patterns contributing to enhance those conditions are characterized by sinking air motion, low boundary layer height, and hot temperatures. Under the synergistic stress of HWs and O3 pollution, the public mortality risk increased by approximately 12.59 % (95 % confidence interval: 4.66 %, 21.42 %). Relative to rural areas, urbanization caused higher risks for HWs, but lower risks for O3 over urban areas. In general, unfavourable synoptic patterns and urbanization can enhance the compound risk of events in Beijing by 45.46 % and 8.08 %, respectively. Our findings provide robust evidence and implications for forecasting compound heatwaves and O3 pollution event and its health risks in Beijing or in other urban areas all over the word having high concentrations of O3 and high-density populations.

Lian Zong et al.

Status: open (until 19 Feb 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-1095', Anonymous Referee #1, 20 Jan 2022 reply

Lian Zong et al.

Lian Zong et al.

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Short summary
Heatwaves (HWs) paired with higher ozone (O3) concentration at surface level pose a serious threat to human health. Taking Beijing as an example, tree unfavourable synoptic weather patterns were identified to dominate the compound HWs and O3 pollution events. Under the synergistic stress of HWs and O3 pollution, the public mortality risk increased, and synoptic patterns and urbanization can enhance the compound risk of events in Beijing by 45.46 % and 8.08 %, respectively.
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