Preprints
https://doi.org/10.5194/acp-2022-718
https://doi.org/10.5194/acp-2022-718
 
01 Nov 2022
01 Nov 2022
Status: this preprint is currently under review for the journal ACP.

Surface ozone over High-Mountain Asia controlled by stratospheric intrusion

Xiufeng Yin1,2, Dipesh Rupakheti3, Guoshuai Zhang4, Jiali Luo5, Shichang Kang1,6, Benjamin de Foy7, Junhua Yang1, Zhenming Ji8, Zhiyuan Cong2,9, Maheswar Rupakheti10, Ping Li11, and Qianggong Zhang2,9 Xiufeng Yin et al.
  • 1State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China
  • 2Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
  • 3Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 4Chinese Academy of Environmental Planning, Beijing 100012, China
  • 5Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China
  • 6University of Chinese Academy of Sciences, Beijing 100049, China
  • 7Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, MO, 63108, USA
  • 8School of Atmospheric Sciences, Key Laboratory for Climate Change and Natural Disaster Studies of and Guangdong Province, Sun Yat-sen University, Guangzhou 510275, China
  • 9State Key Laboratory of Tibetan Plateau Earth System Science, Institute of Tibet Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
  • 10Institute for Advanced Sustainability Studies, Potsdam, Germany
  • 11Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou 730000, China

Abstract. High-Mountain Asia (HMA) is a global hotspot of stratospheric intrusion, and elevated surface ozone were observed at ground monitoring sites. Still, links between the variability of surface ozone and stratospheric intrusion at regional scale remain unclear. This study synthesized ground measurements of surface ozone over the HMA and analyzed their seasonal variations. The monthly mean surface ozone concentrations peaked earlier in the south in April and later in the north in July over the HMA. The migration of monthly surface ozone peaks was coupled with the synchronous movement of tropopause folding and westerly jet that created a conducive conditions for stratospheric ozone intrusion. Such intrusion contributed ~65 % of surface ozone at three typical sites across the HMA. We demonstrated that surface ozone over the HMA is mainly controlled by stratospheric intrusion, which warrants a proper consideration in understanding atmospheric chemistry and impacts of ozone over this highland region and beyond.

Xiufeng Yin et al.

Status: open (until 17 Dec 2022)

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  • RC1: 'Comment on acp-2022-718', Anonymous Referee #1, 24 Nov 2022 reply

Xiufeng Yin et al.

Xiufeng Yin et al.

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Short summary
The monthly mean surface ozone concentrations peaked earlier in the south in April and later in the north in July over the High-Mountain Asia. The migration of monthly surface ozone peaks was coupled with the synchronous movement of tropopause folding and westerly jet that created a conducive conditions for stratospheric ozone intrusion. Stratospheric ozone intrusion contributed ~65 % of surface ozone across the High-Mountain Asia.
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