Glacier velocities across the central Karakoram

被引：99

作者：

Copland, Luke ^{[1
]}

Pope, Sierra ^{[1
]}

Bishop, Michael P. ^{[2
]}

Shroder, John F., Jr. ^{[2
]}

Clendon, Penelope ^{[3
]}

Bush, Andrew ^{[4
]}

Kamp, Ulrich ^{[5
]}

Seong, Yeong Bae ^{[6
]}

Owen, Lewis A. ^{[7
]}

机构：

[1] Univ Ottawa, Dept Geog, Ottawa, ON K1N 6N5, Canada

[2] Univ Nebraska, Dept Geog & Geol, Omaha, NE 68182 USA

[3] Univ Canterbury, Dept Geog, Christchurch 1, New Zealand

[4] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada

[5] Univ Montana, Dept Geog, Missoula, MT 59812 USA

[6] Korea Univ, Dept Geog Educ, Seoul 136701, South Korea

[7] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA

来源：

ANNALS OF GLACIOLOGY | 2009年 / 50卷 / 52期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

BEDROCK INCISION; SURFACE MOTION; SATELLITE; HIMALAYAN; PAKISTAN; SURGES; RATES;

D O I：

10.3189/172756409789624229

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Optical matching of ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) satellite image pairs is used to determine the surface velocities of major glaciers across the central Karakoram. The ASTER images were acquired in 2006 and 2007, and cover a 60 x 120 km region over Baltoro glacier, Pakistan, and areas to the north and west. The surface velocities were compared with differential global position system (GPS) data collected on Baltoro glacier in summer 2005. The ASTER measurements reveal fine details about ice dynamics in this region. For example, glaciers are found to be active over their termini even where they are very heavily debris-covered. The characteristics of several surge-type glaciers were measured, with terminus advances of several hundred meters per year and the displacement of trunk glaciers as surge glaciers pushed into them. This study is the first synthesis of glacier velocities across this region, and provides a baseline against which both past and future changes can be compared.

引用

页码：41 / 49

页数：9

共 27 条

[1]

*B GLAC INV GROUP, 1979, SCI SINICA, V22, P958

[2] Surface motion of mountain glaciers derived from satellite optical imagery [J].