极地研究Issue(4)：402-411,10.DOI:10.13679/j.jdyj.2015.4.402
北极 Svalbard 群岛 Austre Lov énbreen 和Pedersenbreen 冰川表面运动特征
CHARACTERISTICS OF SURFACE MOVEMENT ON THE AUSTRE LOVÉNBREEN AND PEDERSENBREEN GLACIERS, SVALBARD, THE ARCTIC
摘要
Abstract
The glaciers Austre Lov énbreen and Pedersenbreen are located near Ny-Å lesund on the Svalbard archipelago in the Arctic.Surface movement characteristics were analyzed using field data collected from 2005 to 2011 on both glaciers.The average horizontal velocities of Austre Lov énbreen and Pedersenbreen were 2.14 m· a -1 and 6.28 m· a -1 , respectively, and their corresponding variation coefficients were 0.24 and 0.14.The average hori-zontal velocity of the two glaciers in summer was slightly higher than that in winter .There was a multinomial rela-tionship between the glacial horizontal velocity and elevation .The horizontal velocity was larger along the main-stream line of the glaciers than that on the sides , and the distribution was not symmetrical between the two sides of Austre Lovénbreen.Based on the glacial movement features , Austre Lovénbreen could be divided into three regions from its origin to its terminus , a compressional region , a stretching region , and another compressional region .The average vertical velocities of Austre Lov énbreen and Pedersenbreen were 0.76 m· a -1 and 0.90 m· a-1 , respec-tively, and their corresponding variation coefficients were 0.81 and 0.59.The vertical velocities were higher in summer with a smaller variation coefficient than that in winter .There was a linear relationship between the glacial vertical velocity and elevation .Analysis of the contribution of different factors to vertical velocity showed that , on Austre Lovénbreen, height change caused by surface mass balance contributed most (64%), followed by compen-sation flow ( 19%) , and horizontal velocity components ( 16%) .On Pedersenbreen , heigth change caused by surface mass balance again contributed most ( 40%) , followed by horizontal velocity components ( 35%) , and compensation flow (25%) .The surface strain rate decreased then increased negatively along the mainstream line on both Austre Lov énbreen and Pedersenbreen , and the corresponding average variation coefficients were 0 .19 and 0.15, respectively.关键词
Austre Lovénbreen/Pedersenbreen/冰川运动/表面速度/表面应变率Key words
Austre Lovénbreen/Pedersenbreen/glacial movement/surface velocity/surface strain rate引用本文复制引用
李鹏,闫明,艾松涛,徐跃通,刘雷保,孙维君..北极 Svalbard 群岛 Austre Lov énbreen 和Pedersenbreen 冰川表面运动特征[J].极地研究,2015,(4):402-411,10.基金项目
国家自然科学基金（40876098）和国家社会科学基金（12BJY058）资助 （）
