globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-13-00148.1
Scopus记录号: 2-s2.0-84893158842
论文题名:
Tropical pacific influence on the source and transport of marine aerosols to West antarctica
作者: Criscitiello A.S.; Das S.B.; Karnauskas K.B.; Evans M.J.; Frey K.E.; Joughin I.; Steig E.J.; Mcconnell J.R.; Medley B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期:3
起始页码: 1343
结束页码: 1363
语种: 英语
Scopus关键词: Antarctic ice sheets ; Atmospheric circulation ; Atmospheric circulation changes ; Atmospheric dynamics ; Atmospheric variability ; Rossby wave response ; Sea level pressure ; Sea surface temperature anomalies ; Atmospheric aerosols ; Atmospheric chemistry ; Chlorine compounds ; Climate change ; Mechanical waves ; Meteorology ; Sea ice ; Sea level ; Tropics ; Atmospheric movements ; aerosol ; atmospheric circulation ; atmospheric forcing ; atmospheric transport ; marine atmosphere ; Rossby wave ; sea ice ; sea level pressure ; sea surface temperature ; spatial variation ; temperature anomaly ; temporal variation ; warming ; wind velocity ; Amundsen Sea ; Antarctic Ice Sheet ; Antarctica ; Pacific Ocean ; Pacific Ocean (Tropical) ; Pine Island Bay ; Southern Ocean ; West Antarctica
英文摘要: The climate of West Antarctica is strongly influenced by remote forcing from the tropical Pacific. For example, recent surface warming over West Antarctica reflects atmospheric circulation changes over the Amundsen Sea, driven by an atmospheric Rossby wave response to tropical sea surface temperature (SST) anomalies. Here, it is demonstrated that tropical Pacific SST anomalies also influence the source and transport of marine-derived aerosols to theWest Antarctic Ice Sheet. Using records from four firn cores collected along the Amundsen coast of West Antarctica, the relationship between sea ice-modulated chemical species and large-scale atmospheric variability in the tropical Pacific from 1979 to 2010 is investigated. Significant correlations are found between marine biogenic aerosols and sea salts, and SST and sea level pressure in the tropical Pacific. In particular, La Ni~na-like conditions generate an atmospheric Rossby wave response that influences atmospheric circulation over Pine IslandBay. Seasonal regression of atmospheric fields onmethanesulfonic acid (MSA) reveals a reduction in onshore wind velocities in summer at Pine Island Bay, consistent with enhanced katabatic flow, polynya opening, and coastal dimethyl sulfide production. Seasonal regression of atmospheric fields on chloride (C-) reveals an intensification in onshore wind velocities in winter, consistent with sea salt transport fromoffshore source regions. Both the source and transport of marine aerosols toWestAntarctica are found to bemodulated by similar atmospheric dynamics in response to remote forcing. Finally, the regional icecore array suggests that there is both a temporally and a spatially varying response to remote tropical forcing. © 2014 American Meteorological Society.
资助项目: NSF, National Science Foundation ; NSF, National Science Foundation ; NSF, National Science Foundation ; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50958
Appears in Collections:气候变化事实与影响

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作者单位: Massachusetts Institute of Technology, WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Woods Hole, MA, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Chemistry, Wheaton College, Norton, MA, United States; Graduate School of Geography, Clark University, Worcester, MA, United States; Department of Earth and Space Sciences, Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Quaternary Research Center, University of Washington, Seattle, WA, United States; Desert Research Institute, Reno, NV, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Criscitiello A.S.,Das S.B.,Karnauskas K.B.,et al. Tropical pacific influence on the source and transport of marine aerosols to West antarctica[J]. Journal of Climate,2014-01-01,27(3)
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