Characteristics of Antarctic aerosol composition during the Australian fires of 2019-2020  

作　　者：CHEN Afeng WANG Longquan LIU Hongwei YUE Fange XIE Zhouqing 

机构地区：[1]Institute of Polar Environment&Anhui Key Laboratory of Polar Environment and Global Change,Department of Environmental Science and Engineering,University of Science and Technology of China,Hefei 230026,China [2]Engineering and Technological Research Centre of National Disaster Relief Equipment,Army Logistics Academy,Chongqing 401331,China [3]State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China

出　　处：《Advances in Polar Science》2024年第4期421-437,共17页极地科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant nos. 41941014 and 41930532);financially supported by National Polar Special Program “Impact and Response of Antarctic Seas to Climate Change”(Grant no. IRASCC 01-01-02E)。

摘　　要：During the 36th Chinese National Antarctic Research Expedition,aerosol samples were gathered from the Ross Sea in Antarctic to assess the climatic impact of the Australian fires that occurred in 2019-2020.The chemical compositions,including levoglucosan(Lev)and its isomers,galactosan(Gan)and mannosan(Man),were analyzed.Principal component analysis helped identify the potential sources of these chemical components.By combining backward trajectories with the ratios of CLev/CMan and CMan/CGan,it was further inferred that Australia might be the potential source region for biomass burning.The radiative forcing resulting from biomass burning was evaluated using the Santa Barbara DISORT Atmospheric Radiative Transfer(SBDART)model,which revealed that black carbon emitted from biomass burning could slightly warm the atmosphere(+0.52 W·m^(-2))while causing slightly cooling at the surface(-0.73 W·m^(-2))and the top of the atmosphere(-0.22 W·m^(-2))over the Ross Sea.

关 键 词：Australian fires biomass burning aerosol composition climate effect Ross Sea 

分 类 号：P941.61[天文地球—自然地理学] P402