Multi-year variation of near-surface ozone at Zhongshan Station, Antarctica

• Published in: Environmental Research Letters
• Main Authors: Biao Tian, Minghu Ding, Davide Putero, Chuanjin Li, Dongqi Zhang, Jie Tang, Xiangdong Zheng, Lingen Bian, Cunde Xiao
• Format: Article in Journal/Newspaper
• Language: English
• Published: IOP Publishing 2022
• Subjects: near-surface ozone (O3); Zhongshan Station; O3 enhancement events (OEEs); Environmental technology. Sanitary engineering; TD1-1066; Environmental sciences; GE1-350; Science; Q; Physics; QC1-999; Antarctic; East Antarctica; Princess Elizabeth Land; Queen Mary Land; Wilkes Land; Zhongshan; Antarc*; Antarctica; Queen Mary land
• Online Access: https://doi.org/10.1088/1748-9326/ac583c; https://doaj.org/article/3840a0c8ba6c4711936ea80f0a70bee5

With the support of the Chinese National Antarctic Research Expedition, near-surface ozone (O _3 ) was continuously monitored at Zhongshan Station (ZOS) (69°22′12″ S, 76°21′49″ E, 18.5 m above sea level) in East Antarctica from 2008 to 2020. The seasonal and diurnal variability of near-surface O _3 at ZOS were investigated. O _3 enhancement events (OEEs) were frequently observed in the warm season (OEEs in January accounted for 23.0% of all OEEs). The OEEs at ZOS were related to the photochemical reaction processes under the influences of O _3 and solar radiation in the stratosphere and synoptic-scale air mass transport from coastal areas (Princess Elizabeth Land, Wilkes Land, and Queen Mary Land), as evidenced by the recorded wind speed, solar shortwave irradiance, and total column ozone data and the computed potential source contribution function and concentration-weighted trajectory models. The results computed by the tool Stratosphere-to-Troposphere Exchange Flux indicated that stratosphere-to-troposphere transport had no direct impact on OEEs at ZOS. Therefore, synoptic-scale air mass transport is the main cause of OEEs in Antarctica, which is consistent with previous studies. Unlike OEEs at inland Antarctic stations, which are mainly affected by air mass transport from inland plateaus, OEEs at ZOS, a coastal station, are mainly affected by air mass transport from coastal land in East Antarctica.