DOI: 10.5194/tc-12-577-2018
Scopus记录号: 2-s2.0-85042376472
论文题名: Changes in glacier dynamics in the northern Antarctic Peninsula since 1985
作者: Seehaus T ; , Cook A ; J ; , Silva A ; B ; , Braun M
刊名: Cryosphere
ISSN: 19940416
出版年: 2018
卷: 12, 期: 2 起始页码: 577
结束页码: 594
语种: 英语
英文摘要: The climatic conditions along the northern Antarctic Peninsula have shown significant changes within the last 50 years. Here we present a comprehensive analysis of temporally and spatially detailed observations of the changes in ice dynamics along both the east and west coastlines of the northern Antarctic Peninsula. Temporal evolutions of glacier area (1985-2015) and ice surface velocity (1992-2014) are derived from a broad multi-mission remote sensing database for 74 glacier basins on the northern Antarctic Peninsula ( < 65° S along the west coast and north of the Seal Nunataks on the east coast). A recession of the glaciers by 238.81 km2 is found for the period 1985-2015, of which the glaciers affected by ice shelf disintegration showed the largest retreat by 208.59 km2. Glaciers on the east coast north of the former Prince Gustav Ice Shelf extent in 1986 receded by only 21.07 km2 (1985-2015) and decelerated by about 58 % on average (1992-2014). A dramatic acceleration after ice shelf disintegration with a subsequent deceleration is observed at most former ice shelf tributaries on the east coast, combined with a significant frontal retreat. In 2014, the flow speed of the former ice shelf tributaries was 26 % higher than before 1996. Along the west coast the average flow speeds of the glaciers increased by 41 %. However, the glaciers on the western Antarctic Peninsula revealed a strong spatial variability of the changes in ice dynamics. By applying a hierarchical cluster analysis, we show that this is associated with the geometric parameters of the individual glacier basins (hypsometric indexes, maximum surface elevation of the basin, flux gate to catchment size ratio). The heterogeneous spatial pattern of ice dynamic evolutions at the northern Antarctic Peninsula shows that temporally and spatially detailed observations as well as further monitoring are necessary to fully understand glacier change in regions with such strong topographic and climatic variances. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75420
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Institute of Geography, Friedrich-Alexander-University Erlangen-Nuremberg, Wetterkreuz 15, Erlangen, Germany; Department of Geography, Durham University, South Road, Durham, United Kingdom; Laboratório de Monitoramento da Criosfera, Universidade Federal Do Rio Grande, Av. Itália, km 8, Rio Grande, Brazil
Recommended Citation:
Seehaus T,, Cook A,J,et al. Changes in glacier dynamics in the northern Antarctic Peninsula since 1985[J]. Cryosphere,2018-01-01,12(2)