Break‐up of the largest Arctic ice shelf and associated loss of an epishelf lake

@article{Mueller2003BreakupOT,
  title={Break‐up of the largest Arctic ice shelf and associated loss of an epishelf lake},
  author={Derek Mueller and Warwick F. Vincent and Martin O. Jeffries},
  journal={Geophysical Research Letters},
  year={2003},
  volume={30},
  pages={2031}
}
[1] Field observations and RADARSAT imagery of the Ward Hunt Ice Shelf (lat. 83°N, long. 74°W), Nunavut, Canada, show that it broke in two over the period 2000 to 2002, with additional fissuring and further ice island calving. The fracturing caused the drainage of an ice-dammed epishelf lake (Disraeli Fiord), a rare ecosystem type. Reductions in the freshwater volume of Disraeli Fiord occurred from 1967 to the present and accompanied a significant rise in mean annual air temperature over the… Expand

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References

SHOWING 1-10 OF 40 REFERENCES
Ice-shelf collapse, climate change, and habitat loss in the Canadian high Arctic
Abstract Early explorers in the Canadian high Arctic described a fringe of thick, landfast ice along the 500-km northern coast of Ellesmere Island. This article shows from analyses of historicalExpand
The link between climate warming and break-up of ice shelves in the Antarctic Peninsula
Abstract A review of in situ and remote-sensing data covering the ice shelves of the Antarctic Peninsula provides a series of characteristics closely associated with rapid shelf retreat: deeplyExpand
Recent atmospheric warming and retreat of ice shelves on the Antarctic Peninsula
IN 1978 Mercer1 discussed the probable effects of climate warming on the Antarctic Ice Sheet, predicting that one sign of a warming trend in this region would be the retreat of ice shelves on theExpand
Arctic Ice Island and Ice Shelf Studies: Part I
Summarizes some physical characteristics of ice island T-3 and its presumed source, the ice shelf off northern Ellesmere. Investigations since 1952 are described, results tabulated and graphed. TheExpand
Arctic ice shelves and ice islands: Origin, growth and disintegration, physical characteristics, structural-stratigraphic variability, and dynamics
Ice shelves are thick, floating ice masses most often associated with Antarctica where they are seaward extensions of the grounded Antarctic ice sheet and sources of many icebergs. However, there areExpand
Massive, ancient sea-ice strata and preserved physical-structural characteristics in the Ward Hunt Ice Shelf
Two sea-ice layers, one measured as 9 m thick, the other at least 12 m thick and estimated to be 24.5 m thick, have been located by ice core drilling in the west Ward Hunt Ice Shelf. To examine theExpand
Ice Shelf Microbial Ecosystems in the High Arctic and Implications for Life on Snowball Earth
TLDR
The Ward Hunt Ice Shelf is the largest remaining section of thick (>10 m) landfast sea ice along the northern coastline of Ellesmere Island, Canada, and is similar in several of its physical, biological and geochemical features to the McMurdoIce Shelf in Antarctica. Expand
Arctic Environmental Change of the Last Four Centuries
A compilation of paleoclimate records from lake sediments, trees, glaciers, and marine sediments provides a view of circum-Arctic environmental variability over the last 400 years. From 1840 to theExpand
Water Regime of Disraeli Fiord, Ellesmere Island,
Abstract : The mouth of Disraeli Fiord in northern Ellesmere Island is dammed by the Ward Hunt Ice Shelf from the surface to a depth of 44 metres. The fiord contains virtually fresh water to thisExpand
Recent Environmental Changes in the Arctic: A Review
Numerous recent observations indicate that the Arctic is undergoing a significant change. In the last decade, the hydrography of the Arctic Ocean has shifted, and the atmospheric circulation hasExpand
...
1
2
3
4
...