Geomorphological processes and frozen ground conditions in Elephant Point (Livingston Island, South Shetland Islands, Antarctica)
Geomorphological processes and frozen ground conditions in Elephant Point (Livingston Island, South Shetland Islands, Antarctica)
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象角的地貌过程和冻土条件（南极洲南设得兰群岛利文斯顿岛）
DOI：
10.1016/j.geomorph.2016.01.020
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
J. Ruiz‐Fernández
中科院分区：
文献类型：
--
作者：
M. Oliva;J. Ruiz‐Fernández
大象角（Elephant Point）是位于南极洲海上利文斯顿岛西南角的一个无冰区。罗奇穹冰川在全新世期间的退缩暴露了1.16平方公里的陆地面积。在1956年至2010年期间，该表面的17.3%已经成为无冰。2014年1月下旬对这一无冰环境进行了详细的地貌测绘。广泛的活动冰缘地貌表明冰缘过程是广泛的。从冰川到海岸，确定了四个不同的地貌区域：冰前环境，冰碛复合体，基岩高原和海洋阶地。对解冻土壤深度的现场测量显示，该地区有广泛的冻土条件。多年冻土暴露的实地观察表明，这些霜冻条件可能与土壤多年冻土制度，几乎下降到海平面。企鹅群和象海豹的活动在凸起的海洋阶地上形成了小的地貌特征。在这里，还在自然庇护所中发现了与早期人类殖民南极洲有关的几个考古遗址。
Elephant Point is an ice-free area in the SW corner of Livingston Island (Maritime Antarctica). The retreat of Rotch Dome glacier during the Holocene has exposed a land area of 1.16 km2. Up to 17.3% of this surface has become ice-free between 1956 and 2010. A detailed geomorphological mapping of this ice-free environment was conducted in late January 2014. A wide range of active periglacial landforms show that periglacial processes are widespread. From the glacier to the coast four different geomorphological areas are identified: proglacial environment, moraine complex, bedrock plateaus and marine terraces. In situ measurements of the thawed soil depth show evidence of the widespread frozen ground conditions in the area. Field observations of permafrost exposures suggest that these frost conditions may be related to a soil permafrost regime, almost down to sea level. The activity of penguin colonies and elephant seals has created minor geomorphological features in the raised marine terraces. Here, several archaeological sites related to early human colonization of Antarctica were also found in natural shelters.
影响因子：
5
作者：
G. Vieira;J. Bockheim;M. Guglielmin;M. Balks;A. Abramov;J. Boelhouwers;N. Cannone;L. Ganzert;D. Gilichinsky;S. Goryachkin;J. López-Martínez;I. Meiklejohn;R. Raffi;M. Ramos;C. Schaefer;E. Serrano;F. Simas;R. Sletten;D. Wagner
通讯作者：
G. Vieira;J. Bockheim;M. Guglielmin;M. Balks;A. Abramov;J. Boelhouwers;N. Cannone;L. Ganzert;D. Gilichinsky;S. Goryachkin;J. López-Martínez;I. Meiklejohn;R. Raffi;M. Ramos;C. Schaefer;E. Serrano;F. Simas;R. Sletten;D. Wagner
影响因子：
3.3
作者：
Eichel, Jana;Corenblit, Dov;Dikau, Richard
通讯作者：
Dikau, Richard