Evaluating the Ozone Valley over the Tibetan Plateau in CMIP6 Models

作     者：Kequan ZHANG Jiakang DUAN Siyi ZHAO Jiankai ZHANG James KEEBLE Hongwen LIU Kequan ZHANG;Jiakang DUAN;Siyi ZHAO;Jiankai ZHANG;James KEEBLE;Hongwen LIU

作者机构：Key Laboratory for Semi-Arid Climate Change of the Ministry of EducationCollege of Atmospheric SciencesLanzhou UniversityLanzhou 730000China Department of ChemistryUniversity of CambridgeCambridge CB21EWUK National Centre for Atmospheric ScienceCambridge CB21EWUK 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2022年第39卷第7期

页      面：1167-1183页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the second Tibetan Plateau Scientific Expedition and Research Program (STEP,2019QZKK0604) the National Natural Science Foundation of China (Grant Nos.42075062 and 91837311) supported by the Fundamental Research Funds for the Central Universities (lzujbky-2021-ey04) NERC for financial support through NCAS 

主　　题：Tibetan Plateau stratospheric ozone ozone valley CMIP6 

摘      要：Total column ozone(TCO)over the Tibetan Plateau(TP)is lower than that over other regions at the same latitude,particularly in *** feature is known as the“TP ozone valley.This study evaluates long-term changes in TCO and the ozone valley over the TP from 1984 to 2100 using Coupled Model Intercomparison Project Phase 6(CMIP6).The TP ozone valley consists of two low centers,one is located in the upper troposphere and lower stratosphere(UTLS),and the other is in the middle and upper ***,the CMIP6 models simulate the low ozone center in the UTLS well and capture the spatial characteristics and seasonal cycle of the TP ozone valley,with spatial correlation coefficients between the modeled TCO and the Multi Sensor Reanalysis version 2(MSR2)TCO observations greater than 0.8 for all CMIP6 *** analysis reveals that models which use fully coupled and online stratospheric chemistry schemes simulate the anticorrelation between the 150 hPa geopotential height and zonal anomaly of TCO over the TP better than models without interactive chemistry *** suggests that coupled chemical-radiative-dynamical processes play a key role in the simulation of the TP ozone *** CMIP6 models underestimate the low center in the middle and upper stratosphere when compared with the Microwave Limb Sounder(MLS)***,the bias in the middle and upper stratospheric ozone simulations has a marginal effect on the simulation of the TP ozone *** CMIP6 models predict the TP ozone valley in summer will deepen in the future.