Holocene environmental changes and climate development in Greenland
Holocene environmental changes and climate development in Greenland
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格陵兰岛全新世环境变化与气候发展
DOI：
10.1002/ppp.3430050402
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发表时间：
2010
影响因子：
5
通讯作者：
K. Helmens
中科院分区：
文献类型：
--
作者：
S. Engels;K. Helmens
介绍了格陵兰西部的浅层和地表温度，并对格陵兰西部和西南部非冰川地区可利用的深层温度廓线进行了评述。在康格尔卢斯苏亚克(S)地温测量表明，零年变幅深度的温度为−1.6±0.2°C。活动层的平均厚度为1.7m，冻土厚度估计为127±31m。西西米特(荷尔斯坦堡)的多年冻土厚度为33±9m，−为0.3±0.1°C。地貌、风型、积雪特征和积雪融水路径之间的相互作用对决定近距离地温和冻土厚度的变异性起着重要作用。在格陵兰中西部冰缘附近的低降水地区，有效水的分布和再分配尤为重要。因此，与植被不连续的沙质无机土壤相比，低洼、富含有机质、植被密集的土壤的土壤温度往往更低。从格陵兰岛西部的角度来看，西西米特的地面温度相对较高，而康格尔卢斯苏亚克的地面温度相对较低，这是由于它们各自的海洋和大陆气候制度较多。
Shallow and surficial ground temperatures in west Greenland are presented and reviewed together with available deep temperature profiles in the unglaciated area of west and southwest Greenland. Ground temperature measurements in Kangerlussuaq (Søndre Strømfjord) reveal a temperature at the depth of zero annual amplitude, TZAA, of −1.6 ± 0.2°C. The average thickness of the active layer is 1.7 m and the permafrost thickness is estimated to be 127 ± 31 m. The permafrost thickness in Sisimiut (Holsteinborg) is estimated to be 33 ± 9m with TZAAat −0.3 ± 0.1°C. In Sisimiut, the average active layer thickness is 2.3 m. Between Kangerlussuaq and the ice sheet margin, permafrost is continuous and the active layer thickness is between 0.15 and 5.0m. The interactions between geomorphology, wind pattern, snowcover characteristics and paths of snow meltwater play an important role in determining the variability in ground temperature and permafrost thickness over short distances. The distribution and redistribution of available water are especially important in the low‐precipitation area near the ice margin in central west Greenland. Therefore soil temperatures tend to be colder in low‐lying, organic‐rich soils with dense vegetation than in sandy, inorganic soils with discontinuous vegetation. Within a west Greenland perspective, ground temperature in Sisimiut is relatively warm and in Kangerlussuaq relatively cold owing to their respectively more oceanic and continental climatic regimes.