Influence of South Asian Biomass Burning on Ozone and Aerosol Concentrations Over the Tibetan Plateau  

作　　者：Junhua YANG Shichang KANG Yuling HU Xintong CHEN Mukesh RAI 

机构地区：[1]State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences(CAS),Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]CAS Center for Excellence in Tibetan Plateau Earth Sciences,Beijing 100101,China

出　　处：《Advances in Atmospheric Sciences》2022年第7期1184-1197,I0002-I0013,共26页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.42071096 and 41901071);Second Tibetan Plateau Scientific Expedition and Research Program (STEP)(Grant No. 2019QZKK0605);State Key Laboratory of Cryospheric Science (Grant No. SKLCSZZ-2022);Strategic Priority Research Program of Chinese Academy of Sciences;the Open Program (Grant No. SKLCS2020-10) from State Key Laboratory of Cryospheric Science;Youth Science Foundation of Hebei Province (Grant No.D2019106042)

摘　　要：In this work,the influence of South Asian biomass burning emissions on O_(3) and PM_(2.5)concentrations over the Tibetan Plateau(TP)is investigated by using the regional climate chemistry transport model WRF-Chem.The simulation is validated by comparing meteorological fields and pollutant concentrations against in situ observations and gridded datasets,providing a clear perspective on the spatiotemporal variations of O_(3) and PM_(2.5)concentrations across the Indian subcontinent,including the Tibetan Plateau.Further sensitivity simulations and analyses show that emissions from South Asian biomass burning mainly affect local O_(3) concentrations.For example,contribution ratios were up to 20%in the Indo-Gangetic Plain during the pre-monsoon season but below 1%over the TP throughout the year 2016.In contrast,South Asian biomass burning emissions contributed more than 60%of PM_(2.5)concentration over the TP during the pre-monsoon season via significant contribution of primary PM_(2.5)components(black carbon and organic carbon)in western India that were lofted to the TP by westerly winds.Therefore,it is suggested that cutting emissions from South Asian biomass burning is necessary to alleviate aerosol pollution over the TP,especially during the pre-monsoon season.

关 键 词：South Asian biomass burning OZONE AEROSOL black carbon Tibetan Plateau 

分 类 号：X51[环境科学与工程—环境工程]