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Elucidating the Role of Anthropogenic Aerosols in Arctic Sea Ice Variations

Title
Elucidating the Role of Anthropogenic Aerosols in Arctic Sea Ice Variations
Authors
Wang, YuanJiang, Jonathan H.Su, HuiChoi, Yong-SangHuang, LeiGuo, JianpingYung, Yuk L.
Ewha Authors
최용상
SCOPUS Author ID
최용상scopus
Issue Date
2018
Journal Title
JOURNAL OF CLIMATE
ISSN
0894-8755JCR Link

1520-0442JCR Link
Citation
JOURNAL OF CLIMATE vol. 31, no. 1, pp. 99 - 114
Publisher
AMER METEOROLOGICAL SOC
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Observations show that the Arctic sea ice cover has been shrinking at an unprecedented rate since the 1970s. Even though the accumulation of greenhouse gases in the atmosphere has been closely linked with the loss of Arctic sea ice, the role of atmospheric aerosols in past and future Arctic climate change remains elusive. Using a state-of-the-art fully coupled climate model, the authors assess the equilibrium responses of the Arctic sea ice to the different aerosol emission scenarios and investigate the pathways by which aerosols impose their influence in the Arctic. These sensitivity experiments show that the impacts of aerosol pertur-bations on the pace of sea ice melt effectively modulate the ocean circulation and atmospheric feedbacks. Because of the contrasting evolutions of particulate pollution in the developed and developing countries since the 1970s, the opposite aerosol forcings from different midlatitude regions are nearly canceled out in the Arctic during the boreal summer, resulting in a muted aerosol effect on the recent sea ice changes. Consequently, the greenhouse forcing alone can largely explain the observed Arctic sea ice loss up to the present. In the next few decades, the projected alleviation of particulate pollution in the Northern Hemisphere can contribute up to 20% of the total Arctic sea ice loss and 0.7 degrees C surface warming over the Arctic. The authors' model simulations further show that aerosol microphysical effects on the Arctic clouds are the major component in the total aerosol radiative forcing over the Arctic. Compared to the aerosol-induced energy imbalance in lower latitudes outside the Arctic, the local radiative forcing by aerosol variations within the Arctic, due to either local emissions or long-range transports, is more efficient in determining the sea ice changes and Arctic climate change.
DOI
10.1175/JCLI-D-17-0287.1
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엘텍공과대학 > 환경공학전공 > Journal papers
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