Preprints
https://doi.org/10.5194/egusphere-2023-1393
https://doi.org/10.5194/egusphere-2023-1393
24 Oct 2023
 | 24 Oct 2023
Status: this preprint has been withdrawn by the authors.

Impact of upper-level circulation on upper troposphere and lower stratosphere ozone distribution over Northeast Asia

Zhiheng Liao, Jinqiang Zhang, Yubin Pan, Xingcan Jia, Pengkun Ma, Qianqian Wang, Zhigang Cheng, Lindong Dai, and Jiannong Quan

Abstract. Ozone (O3) in the upper troposphere and lower stratosphere (UTLS) is strongly regulated by upper-level circulation dynamics. Understanding the coupling between UTLS O3 distribution and upper-level circulation dynamics is important not only to understand synoptic processes governing O3 distribution and variability, but also to test the fidelity of chemistry transport models in simulating the stratosphere–troposphere exchange (STE) processes. This study presents the first systematic assessment of observationally constrained UTLS O3 variability associated with upper-level circulation patterns over the Northeast Asia region. By applying the self-organized mapping (SOM) technique to 500, 250, and 100 hPa geopotential height (GPH) data, 12 circulation patterns are quantified and then used to characterize the UTLS O3 distribution in the period 2000–2020 in both four-site (Beijing, Pohang, Tateno, and Sapporo) ozonesonde data and regional-scale satellite products. The underlying dynamic transport mechanism responsible for UTLS O3 responses to different circulation patterns are further explored through correlation analysis between O3 anomalies and transport indicators. The results indicate that although O3 at almost all altitudes shows statistically significant sensitivity to circulation patterns, lower-stratospheric O3 exhibits a far stronger sensitivity when compared with upper-tropospheric O3. Circulation patterns featuring the East Asian Trough (EAT) show clear enhancement of O3 southwest of the trough, and the enhancement zone moves with the eastward propagation of the EAT. Circulation patterns featuring eastward-shedding vortices of the Asia Summer Monsoon Anticyclone (ASMA) show the opposite signal, in which O3 concentrations are decreased, especially at Sapporo, and the negative O3 anomaly zone stretches from South Japan to Sakhalin Island. Each circulation pattern is characterized by distinct transport pathways, which play a determining role in the pattern-specific UTLS O3 response. Positive O3 anomalies are usually associated with post-trough downward and southward transport, whereas negative O3 anomalies are commonly associated with fore-trough upward and northward transport. In the lower stratosphere, the correlation between O3 anomalies and transport indicators is significantly stronger than that in the upper troposphere, and the strongest correlation occurs in the lower stratosphere of Beijing.

This preprint has been withdrawn.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Zhiheng Liao, Jinqiang Zhang, Yubin Pan, Xingcan Jia, Pengkun Ma, Qianqian Wang, Zhigang Cheng, Lindong Dai, and Jiannong Quan

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1393', Anonymous Referee #2, 05 Dec 2023
  • RC2: 'Comment on egusphere-2023-1393', Anonymous Referee #1, 13 Dec 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1393', Anonymous Referee #2, 05 Dec 2023
  • RC2: 'Comment on egusphere-2023-1393', Anonymous Referee #1, 13 Dec 2023
Zhiheng Liao, Jinqiang Zhang, Yubin Pan, Xingcan Jia, Pengkun Ma, Qianqian Wang, Zhigang Cheng, Lindong Dai, and Jiannong Quan
Zhiheng Liao, Jinqiang Zhang, Yubin Pan, Xingcan Jia, Pengkun Ma, Qianqian Wang, Zhigang Cheng, Lindong Dai, and Jiannong Quan

Viewed

Total article views: 384 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
263 94 27 384 18 15
  • HTML: 263
  • PDF: 94
  • XML: 27
  • Total: 384
  • BibTeX: 18
  • EndNote: 15
Views and downloads (calculated since 24 Oct 2023)
Cumulative views and downloads (calculated since 24 Oct 2023)

Viewed (geographical distribution)

Total article views: 373 (including HTML, PDF, and XML) Thereof 373 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 22 Jun 2024
Download

This preprint has been withdrawn.

Short summary
This study presents the first systematic assessment of observationally constrained UTLS O3 variability over the Northeast Asia region in the framework of upper-level circulation pattern classification. The results indicate that lower-stratospheric O3 exhibits a far stronger sensitivity to upper-level circulation patterns when compared with upper-tropospheric O3. The progression of the East Asian Trough plays a critical role in determining the location and intensity of O3 enhancements.