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

CHEN Afeng ¹WANG Longquan ²LIU Hongwei ²YUE Fange ²XIE Zhouqing³

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作者信息

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;Engineering and Technological Research Centre of National Disaster Relief Equipment,Army Logistics Academy,Chongqing 401331,China
2. 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
3. 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;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China
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Abstract

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.

Key words

Australian fires/biomass burning/aerosol composition/climate effect/Ross Sea

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出版年

2024

极地科学进展(英文版)

中国极地研究中心,国家海洋局极地考察办公室 (Polar Research Institute of China, Chinese Arctic and Antarctic Administration)

极地科学进展(英文版)

影响因子：0.145

ISSN：1674-9928

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