globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-14-00720.1
Scopus记录号: 2-s2.0-84931587218
论文题名:
Airmass origin in the Arctic. Part I: Seasonality
作者: Orbe C.; Newman P.A.; Waugh D.W.; Holzer M.; Oman L.D.; Li F.; Polvani L.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期:12
起始页码: 4997
结束页码: 5014
语种: 英语
Scopus关键词: Boundary layers ; Earth (planet) ; Pollution ; Wind effects ; Chemistry-climate models ; Goddard earth observing systems ; Large scale motion ; Northern Hemispheres ; Planetary boundary layers ; Seasonal variation ; Transport ; Western Pacific ; Climate models ; air mass ; arctic environment ; boundary layer ; climate modeling ; EOS ; Northern Hemisphere ; pollutant transport ; seasonality ; Asia ; North America ; Pacific Ocean ; Pacific Ocean (East) ; Pacific Ocean (West)
英文摘要: The first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a present-day climate integration of the Goddard Earth Observing System Chemistry-Climate Model (GEOSCCM) reveal that the majority of air in the Arctic below 700 mb last contacted the PBL poleward of 60°N. By comparison, 62% (±0.8%) of the air above 700 mb originates over Northern Hemisphere midlatitudes (i.e., "midlatitude air"). Seasonal variations in the airmass fractions above 700 mb reveal that during boreal winter air from midlatitudes originates primarily over the oceans, with 26% (±1.9%) last contacting the PBL over the eastern Pacific, 21% (±0.87%) over the Atlantic, and 16% (±1.2%) over the western Pacific. During summer, by comparison, midlatitude air originates primarily over land, overwhelmingly so over Asia [41% (±1.0%)] and, to a lesser extent, over North America [24% (±1.5%)]. Seasonal variations in the airmass fractions are interpreted in terms of changes in the large-scale ventilation of the midlatitude boundary layer and the midlatitude tropospheric jet. © 2015 American Meteorological Society.
资助项目: NASA, National Science Foundation ; NSF, National Science Foundation ; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50611
Appears in Collections:气候变化事实与影响

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作者单位: Laboratory for Atmospheric Chemistry and Dynamics, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States; Department of Applied Mathematics, School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States

Recommended Citation:
Orbe C.,Newman P.A.,Waugh D.W.,et al. Airmass origin in the Arctic. Part I: Seasonality[J]. Journal of Climate,2015-01-01,28(12)
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