DOI: 10.5194/tc-9-565-2015
Scopus记录号: 2-s2.0-84925346803
论文题名: Changes in the southeast Vatnajo7die;kull ice cap, Iceland, between ∼1890 and 2010c
作者: Hannesdóttir H ; , Björnsson H ; , Pálsson F ; , Adalgeirsdóttir G ; , Gudmundsson Sv
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 2 起始页码: 565
结束页码: 585
语种: 英语
英文关键词: climate forcing
; cryosphere
; digital elevation model
; glacier mass balance
; ice cap
; Little Ice Age
; proglacial environment
; sea level change
; twenty first century
; volume change
; Iceland
; Vatnajokull
英文摘要: Area and volume changes and the average geodetic mass balance of the non-surging outlet glaciers of the southeast Vatnajökull ice cap, Iceland, during different time periods between ∼ 1890 and 2010, are derived from a multi-temporal glacier inventory. A series of digital elevation models (DEMs) (∼ 1890, 1904, 1936, 1945, 1989, 2002, 2010) are compiled from glacial geomorphological features, historical photographs, maps, aerial images, DGPS measurements and a lidar survey. Given the mapped basal topography, we estimate volume changes since the end of the Little Ice Age (LIA) ∼ 1890. The variable volume loss of the outlets to similar climate forcing is related to their different hypsometry, basal topography, and the presence of proglacial lakes. In the post-LIA period, the glacierized area decreased by 164 km2 (or from 1014 to 851 km2) and the glaciers had lost 10-30 % of their ∼ 1890 area by 2010 (anywhere from 3 to 36 km2). The glacier surface lowered by 150-270 m near the terminus and the outlet glaciers collectively lost 60 ± 8 km3 of ice, which is equivalent to 0.15 ± 0.02 mm of sea-level rise. The volume loss of individual glaciers was in the range of 15-50%, corresponding to a geodetic mass balance between -0.70 and -0.32 m w.e. a-1. The annual rate of mass change during the post-LIA period was most negative in 2002-2010, on average -1.34 ± 0.12 m w.e. a-1, which is among the most negative mass balance values recorded worldwide in the early 21st century. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75325
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 Earth Sciences, University of Iceland, Reykjavík, Iceland
Recommended Citation:
Hannesdóttir H,, Björnsson H,, Pálsson F,et al. Changes in the southeast Vatnajo7die;kull ice cap, Iceland, between ∼1890 and 2010c[J]. Cryosphere,2015-01-01,9(2)