Regional and global volumes of glaciers derived from statistical upscaling of glacier inventory data

被引:212
作者
Radic, Valentina [1 ,2 ]
Hock, Regine [2 ,3 ]
机构
[1] Univ British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V6T 1Z4, Canada
[2] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
[3] Uppsala Univ, Dept Earth Sci, Uppsala, Sweden
关键词
BERING GLACIER; TOPOGRAPHY; ALASKA;
D O I
10.1029/2009JF001373
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Very few global-scale ice volume estimates are available for mountain glaciers and ice caps, although such estimates are crucial for any attempts to project their contribution to sea level rise in the future. We present a statistical method for deriving regional and global ice volumes from regional glacier area distributions and volume area scaling using glacier area data from similar to 123,000 glaciers from a recently extended World Glacier Inventory. We compute glacier volumes and their sea level equivalent (SLE) for 19 glacierized regions containing all mountain glaciers and ice caps on Earth. On the basis of total glacierized area of 741 x 10(3) +/- 68 x 10(3) km(2), we estimate a total ice volume of 241 x 10(3) +/- 29 x 10(3) km(3), corresponding to 0.60 +/- 0.07 m SLE, of which 32% is due to glaciers in Greenland and Antarctica apart from the ice sheets. However, our estimate is sensitive to assumptions on volume area scaling coefficients and glacier area distributions in the regions that are poorly inventoried, i.e., Antarctica, North America, Greenland, and Patagonia. This emphasizes the need for more volume observations, especially of large glaciers and a more complete World Glacier Inventory in order to reduce uncertainties and to arrive at firmer volume estimates for all mountain glaciers and ice caps.
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页数:10
相关论文
共 34 条
[1]  
[Anonymous], 1994, The Physics of Glaciers
[2]   Rapid wastage of Alaska glaciers and their contribution to rising sea level [J].
Arendt, AA ;
Echelmeyer, KA ;
Harrison, WD ;
Lingle, CS ;
Valentine, VB .
SCIENCE, 2002, 297 (5580) :382-386
[3]   Width and length scaling of glaciers [J].
Bahr, DB .
JOURNAL OF GLACIOLOGY, 1997, 43 (145) :557-562
[4]   The physical basis of glacier volume-area scaling [J].
Bahr, DB ;
Meier, MF ;
Peckham, SD .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1997, 102 (B9) :20355-20362
[5]   Global distributions of glacier properties: A stochastic scaling paradigm [J].
Bahr, DB .
WATER RESOURCES RESEARCH, 1997, 33 (07) :1669-1679
[6]   Snow patch and glacier size distributions [J].
Bahr, DB ;
Meier, MF .
WATER RESOURCES RESEARCH, 2000, 36 (02) :495-501
[7]  
Bedford D, 1996, EARTH SYSTEM MONITOR, V6, P8
[8]   Improving estimation of glacier volume change: a GLIMS case study of Bering Glacier System, Alaska [J].
Beedle, M. J. ;
Dyurgerov, M. ;
Tangborn, W. ;
Khalsa, S. J. S. ;
Helm, C. ;
Raup, B. ;
Armstrong, R. ;
Barry, R. G. .
CRYOSPHERE, 2008, 2 (01) :33-51
[9]  
Bevington P. R., 1969, DATA REDUCTION ERROR
[10]  
Bishop MichaelP., 2004, Geocarto International, V19, P57, DOI [DOI 10.1080/10106040408542307, 10.1080/10106040408542307]