文献类型：期刊文献

英文题名：Effect of ENSO on the Ozone Valley over the Tibetan Plateau Based on the WACCM4 Model

作者：Li, Yongchi[1];Xu, Feng[1];Wan, Lingfeng[2];Chen, Peng[1];Guo, Dong[3,4];Chang, Shujie[1,5];Yang, Chen[3,4]

机构：[1]Guangdong Ocean Univ, South China Sea Inst Marine Meteorol, Resources & Environm Continental Shelf Sea & Deep, Coll Ocean & Meteorol,Lab Coastal Ocean Variat & D, Zhanjiang 524088, Peoples R China;[2]Ocean Univ China, Inst Adv Ocean Study IAOS, Frontier Sci Ctr Deep Ocean Multispheres & Earth S, Phys Oceanog Lab POL, Qingdao 266100, Peoples R China;[3]Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Key Lab Meteorol Disaster, Joint Int Res Lab Climate & Environm Change ILCEC,, Nanjing 210044, Peoples R China;[4]Nanjing Univ Informat Sci & Technol, Reading Acad, Nanjing 210044, Peoples R China;[5]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing 100081, Peoples R China

年份：2023

卷号：15

期号：2

外文期刊名：REMOTE SENSING

收录：SCI-EXPANDED(收录号：WOS:000916222400001)、、EI(收录号：20230413429516)、Scopus(收录号：2-s2.0-85146684455)、WOS

语种：英文

外文关键词：ENSO; ozone valley; Tibetan Plateau; WACCM

外文摘要：El Nino-Southern Oscillation (ENSO) is the most significant global ocean-atmosphere coupled signal in the tropical Pacific Ocean, and it can affect the stratosphere. However, the ENSO-related dynamical processes that influence the ozone valley during summer are still not well understood and are under-investigated. In this study, we used the ERA5 and MERRA-2 reanalysis data from 1979 to 2021 combined with numerical simulations to analyze the mechanisms through which ENSO affects the ozone valley over the Tibetan Plateau in the upper troposphere and the lower stratosphere (UTLS) in summer. The results showed that the two cores of the ozone valley in UTLS were more evident in the summer following La Nina than in the summer following El Nino. At low latitudes, negative O-3 anomalies in UTLS were observed in the summer following El Nino and positive O-3 anomalies were observed in the summer following La Nina. At middle latitudes, negative O-3 anomalies in UTLS were found near 60 degrees E in the summer following El Nino, while negative anomalies were found at 40 degrees E and 120 degrees E in the summer following La Nina. The analysis of the flow and vorticity fields suggested that the field anomalies can cause vertical motion, which in turn leads to the mixing of different ozone concentrations and affects the ozone valley in UTLS over the Tibetan Plateau. In particular, the warming of the Indian Ocean sea-surface temperature (SST) in the summer following El Nino enhances the South Asian High (SAH) through two-stage thermal adaptation, leading to ozone anomalies at low latitudes in the ozone-valley region. These conclusions were verified by a simulation using the WACCM4 model, the results of which were consistent with the original observations.