DOI: 10.1007/s00382-012-1460-7
Scopus记录号: 2-s2.0-84867099309
论文题名: Seasonal climate information preserved in West Antarctic ice core water isotopes: Relationships to temperature, large-scale circulation, and sea ice
作者: Küttel M. ; Steig E.J. ; Ding Q. ; Monaghan A.J. ; Battisti D.S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-07-08 起始页码: 1841
结束页码: 1857
语种: 英语
英文关键词: Antarctica
; Atmospheric circulation
; Diffusion
; Ice cores
; Sea ice
; Temperature
; Water isotopes
英文摘要: As part of the United States' contribution to the International Trans-Antarctic Scientific Expedition (ITASE), a network of precisely dated and highly resolved ice cores was retrieved from West Antarctica. The ITASE dataset provides a unique record of spatial and temporal variations of stable water isotopes (δ18O and δD) across West Antarctica. We demonstrate that, after accounting for water vapor diffusion, seasonal information can be successfully extracted from the ITASE cores. We use meteorological reanalysis, weather station, and sea ice data to assess the role of temperature, sea ice, and the state of the large-scale atmospheric circulation in controlling seasonal average water isotope variations in West Antarctica. The strongest relationships for all variables are found in the cores on and west of the West Antarctic Ice Sheet Divide and during austral fall. During this season positive isotope anomalies in the westernmost ITASE cores are strongly related to a positive pressure anomaly over West Antarctica, low sea ice concentrations in the Ross and Amundsen Seas, and above normal temperatures. Analyses suggest that this seasonally distinct climate signal is due to the pronounced meridional oriented circulation and its linkage to enhanced sea ice variations in the adjacent Southern Ocean during fall, both of which also influence local to regional temperatures. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55139
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Seattle, WA 98195, United States; National Center for Atmospheric Research, Boulder, CO 80307-3000, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, United States
Recommended Citation:
Küttel M.,Steig E.J.,Ding Q.,et al. Seasonal climate information preserved in West Antarctic ice core water isotopes: Relationships to temperature, large-scale circulation, and sea ice[J]. Climate Dynamics,2012-01-01,39(2017-07-08)