Greenland's Ice Sheet: 1 of 2: "We discovered that the ice sheet used to be faster (flowing) than it is now...and we came up with three different reasons.." Joseph A. MacGregor, York University,Toronto, Ontaria, Canada.

Sep 16, 03:05 AM

AUTHOR.

(Photo:Image from page 550 of "Northward over the "great ice" : a narrative of life and work along the shores and upon the interior ice-cap of northern Greenland in the years 1886 and 1891-1897 ..." (1914) 

Identifier: northwardovergre01pear

Title: Northward over the "great ice" : a narrative of life and work along the shores and upon the interior ice-cap of northern Greenland in the years 1886 and 1891-1897 ...

Year: 1914 (1910s)

Authors: Peary, Robert E. (Robert Edwin), 1856-1920

Subjects:

Publisher: New York : F. A. Stokes Co.

Contributing Library: University of California Libraries

Digitizing Sponsor: Internet Archive

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merous sea-birds,—Hak-luyt, Dalrymple. The contrast between individual islands, thoughmarked in each group, is especially noticeable in thecase of Herbert and Northumberland. Though sepa-rated by a channel scarcely more than one mile wide,Herbert is a vertical-sided, fiat-topped mass of varie-gated sandstone without a sea-level glacier, and withbut a small ice-cap ; while Northumberland is a mass Appendix 473 of high summits of gneissose and basaltic rocks ahnostcompletely covered with ice-cap, from which exudenumerous sea-level glaciers. This island presents, inthe close juxtaposition of flowing white ice-domes andragged black cliffs, the most striking contrasts of colourand sky contour. Another feature is the frequent recurrence of sharpconical rocks rising directly from the sea. The leastpronounced of these is Round Island, some thirtymiles east of Cape York. Then come the well-knownConical, Dalrymple, and Bell Rocks ; then the less-known and smaller but equally pronounced Little

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LITTLETON ISLAND FROM SITE OF POLARIS HOUSE. Matterhorn at the head of Inglefield Gulf, and Suther-land Island just south of Cape Alexander. In the proximity of the ice-cap to the shore, andthe existence of numerous detached ice-caps or domesseparated completely from the Inland-Ice sheet, thisregion is marked. An impressive feature, too, is the glaciers ; hundredsof these, of all sizes, shapes, and characteristics, flow Still further ex.imples of these peculiar islands are Cocked-Hat Island westof Cape Sabine, Cone Island in Jones Sound, and Sugar Loaf in the bay southof Wilcox Head. 474 Northward over the Great Ice down the numerous fjords, valleys, and ravines of thiscoast from the Great Ice towards the sea. Many ofthem never reach the sea, but waste away in thewarmth of the valleys. Others do attain the sea,stretching unctuous blue ice-cliffs, fifty to one hundredand fifty feet high and one half to ten miles long, alongthe shore and across the heads of bays, from whichevery year is

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Greenland's Ice Sheet: 1 of 2: "We discovered that the ice sheet used to be faster (flowing) than it is now...and we came up with three different reasons.."  Joseph A. MacGregor, York University,Toronto, Ontaria, Canada.

http://science.sciencemag.org/content/351/6273/590.short

"Holocene deceleration of the Greenland Ice Sheet"

Joseph A. MacGregor1,*, William T. Colgan2,†, Mark A. Fahnestock3, Mathieu Morlighem4, Ginny A. Catania1,5, John D. Paden6, S. Prasad Gogineni6

1Institute for Geophysics, The University of Texas at Austin, Austin, TX 78758, USA.

2Geological Survey of Denmark and Greenland, ...