DOI: 10.1175/JCLI-D-12-00167.1
Scopus记录号: 2-s2.0-84875824069
论文题名: Seasonality of airmass pathways to coastal Antarctica: Ramifications for interpreting high-resolution ice core records
作者: Sinclair K.E. ; Bertler N.A.N. ; Trompetter W.J. ; Baisden W.T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 6 起始页码: 2065
结束页码: 2076
语种: 英语
Scopus关键词: Annual temperatures
; Antarctic ice core
; Atmospheric circulation
; Back trajectories
; East antarctica
; Ice core records
; Paleoclimate records
; Stable isotope data
; Climatology
; Digital storage
; Isotopes
; Snow
; Trajectories
; Ice
; air mass
; atmospheric circulation
; ice core
; low pressure system
; marine atmosphere
; paleoclimate
; seasonality
; synoptic meteorology
; Antarctica
; Ross Sea
; Southern Ocean
; West Antarctica
英文摘要: Understanding airmass pathways is critical for ice core interpretation, and the ability to determine the broadscale characteristics and seasonality of synoptic-scale flow using paleoclimate records offers great potential to improve the understanding of past atmospheric circulation. The dominant airmass pathways to a coastal Antarctic ice core site at the Whitehall Glacier in the Ross Sea are modeled using snowfall and highresolution stable isotope data between 1979 and 2006, combined with back trajectories produced from both NCEP-NCAR and ECMWF Interim Re-Analysis (ERA-Interim) data. Back trajectories generated from both datasets produce comparable results. They show that high snowfall is associated with cyclonic airflow in the Ross Sea with a strong meridional component along the western Ross Sea coast. Over a 28-yr time frame, trajectories also reveal a clear distinction between flow paths associated with above- and below-average annual temperatures (high and low δD) in the ice core record. In cold months (low δD), when there is a strengthened trough of low pressure around the continent, synoptically driven incursions of marine air across West Antarctica and trajectories originating from coastal East Antarctica are dominant. Conversely, in warmer months (high δD), airmass pathways are centered over the Ross Sea and the adjacent Southern Ocean. These trajectories are slower moving and are expected to draw marine moisture from high-latitude seasonally open oceans. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51946
Appears in Collections: 气候变化事实与影响
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作者单位: National Isotope Centre, GNS Science, Wellington, New Zealand; National Isotope Centre, GNS Science, and Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
Recommended Citation:
Sinclair K.E.,Bertler N.A.N.,Trompetter W.J.,et al. Seasonality of airmass pathways to coastal Antarctica: Ramifications for interpreting high-resolution ice core records[J]. Journal of Climate,2013-01-01,26(6)