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DOI | 10.1002/2017GL076251 |
Limited Impact of Subglacial Supercooling Freeze-on for Greenland Ice Sheet Stratigraphy | |
Dow, Christine F.1; Karlsson, Nanna B.2; Werder, Mauro A.3 | |
2018-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:3页码:1481-1489 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Germany; Switzerland |
英文摘要 | Large units of disrupted radiostratigraphy (UDR) are visible in many radio-echo sounding data sets from the Greenland Ice Sheet. This study investigates whether supercooling freeze-on rates at the bed can cause the observed UDR. We use a subglacial hydrology model to calculate both freezing and melting rates at the base of the ice sheet in a distributed sheet and within basal channels. We find that while supercooling freeze-on is a phenomenon that occurs in many areas of the ice sheet, there is no discernible correlation with the occurrence of UDR. The supercooling freeze-on rates are so low that it would require tens of thousands of years with minimal downstream ice motion to form the hundreds of meters of disrupted radiostratigraphy. Overall, the melt rates at the base of the ice sheet greatly overwhelm the freeze-on rates, which has implications for mass balance calculations of Greenland ice. |
英文关键词 | Greenland Ice Sheet supercooling ice stratigraphy radio-echo sounding subglacial hydrology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426161800034 |
WOS关键词 | SUPRAGLACIAL LAKE ; BASAL MELT ; SEA-LEVEL ; DRAINAGE ; DEFORMATION ; VARIABILITY ; MELTWATER ; VALLEYS ; SYSTEM ; DRIVEN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28531 |
专题 | 气候变化 |
作者单位 | 1.Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada; 2.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany; 3.Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol VAW, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Dow, Christine F.,Karlsson, Nanna B.,Werder, Mauro A.. Limited Impact of Subglacial Supercooling Freeze-on for Greenland Ice Sheet Stratigraphy[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(3):1481-1489. |
APA | Dow, Christine F.,Karlsson, Nanna B.,&Werder, Mauro A..(2018).Limited Impact of Subglacial Supercooling Freeze-on for Greenland Ice Sheet Stratigraphy.GEOPHYSICAL RESEARCH LETTERS,45(3),1481-1489. |
MLA | Dow, Christine F.,et al."Limited Impact of Subglacial Supercooling Freeze-on for Greenland Ice Sheet Stratigraphy".GEOPHYSICAL RESEARCH LETTERS 45.3(2018):1481-1489. |
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