DOI: 10.5194/cp-12-115-2016
Scopus记录号: 2-s2.0-84961342556
论文题名: Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data
作者: Pickler C. ; Beltrami H. ; Mareschal J.-C.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 1 起始页码: 115
结束页码: 127
语种: 英语
Scopus关键词: basal flow
; basal temperature
; borehole logging
; geomorphology
; heat flow
; ice stream
; Last Glacial
; Laurentide Ice Sheet
; paleoclimate
; paleotemperature
; temperature gradient
; temperature profile
; trend analysis
; vertical distribution
; Canada
; Calluna vulgaris
英文摘要: Thirteen temperature-depth profiles (≥ 1500 m) measured in boreholes in eastern and central Canada were inverted to determine the ground surface temperature histories during and after the last glacial cycle. The sites are located in the southern part of the region that was covered by the Laurentide Ice Sheet. The inversions yield ground surface temperatures ranging from-1.4 to 3.0 °C throughout the last glacial cycle. These temperatures, near the pressure melting point of ice, allowed basal flow and fast flowing ice streams at the base of the Laurentide Ice Sheet. Despite such conditions, which have been inferred from geomorphological data, the ice sheet persisted throughout the last glacial cycle. Our results suggest some regional trends in basal temperatures with possible control by internal heat flow. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49073
Appears in Collections: 气候变化与战略
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Recommended Citation:
Pickler C.,Beltrami H.,Mareschal J.-C.. Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data[J]. Climate of the Past,2016-01-01,12(1)