Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/S0954102098000054 |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica | |
McKay, CP; Mellon, MT; Friedmann, EI | |
通讯作者 | McKay, CP |
来源期刊 | ANTARCTIC SCIENCE
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ISSN | 0954-1020 |
出版年 | 1998 |
卷号 | 10期号:1页码:31-38 |
英文摘要 | Year-round temperature measurements at 1600 m elevation during 1994 in the Asgard Range Antarctica, indicate that the mean annual frost point of the ice-cemented ground, 25 cm below the surface, is -21.7 +/- 0.2 degrees C and the mean annual frost point of the atmosphere is -27.5 +/- 1.0 degrees C. The corresponding mean annual temperatures are -24.9 degrees C and -23.3 degrees C. These results imply that there is a net flux of water vapour from the ice to the atmosphere resulting in a recession of the ice-cemented ground by about 0.4-0.6 mm yr(1). The level of the ice-cemented permafrost is about 12 cm below the level of dry permafrost. The summer air temperatures would have to increase about 7 degrees C for thawing temperatures to just reach the top of the subsurface ice. Either subsurface ice at this location is evaporating over time or there are sporadic processes that recharge the ice and maintain equilibrium over long timescales. |
英文关键词 | climate change dry valleys ice-cemented ground Linnaeus Terrace |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000072760800005 |
WOS关键词 | CRYPTOENDOLITHIC MICROBIAL ENVIRONMENT ; ROSS DESERT ; PERMAFROST ; REGION |
WOS类目 | Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/135327 |
作者单位 | (1)NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA;(2)Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306 USA |
推荐引用方式 GB/T 7714 | McKay, CP,Mellon, MT,Friedmann, EI. Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica[J],1998,10(1):31-38. |
APA | McKay, CP,Mellon, MT,&Friedmann, EI.(1998).Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica.ANTARCTIC SCIENCE,10(1),31-38. |
MLA | McKay, CP,et al."Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica".ANTARCTIC SCIENCE 10.1(1998):31-38. |
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