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Author
Masson-Delmotte, V.; Jouzel, J.; Landais, A.; Stievenard, M.; Johnsen, S.J.; White, J.W.C.; Werner, M.; Sveinbjornsdottir, A.; Fuhrer, K.
Title
GRIP Deuterium Excess Reveals Rapid and Orbital-Scale Changes in Greenland Moisture Origin
Type
Journal Article
Year
2005
Publication
Science
Abbreviated Journal
Science
Volume
309
Issue
5731
Pages
118-121
Keywords
Abstract
The Northern Hemisphere hydrological cycle is a key factor coupling ice sheets, ocean circulation, and polar amplification of climate change. Here we present a Northern Hemisphere deuterium excess profile covering one climatic cycle, constructed with the use of {delta}18O and {delta}D Greenland Ice Core Project (GRIP) records. Past changes in Greenland source and site temperatures are quantified with precipitation seasonality taken into account. The imprint of obliquity is evidenced in the site-to-source temperature gradient at orbital scale. At the millennial time scale, GRIP source temperature changes reflect southward shifts of the geographical locations of moisture sources during cold events, and these rapid shifts are associated with large-scale changes in atmospheric circulation.
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0036-8075
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Notes
10.1126/science.1108575
Approved
yes
Call Number
IPEV @ Thierry.Lemaire @
Serial
5507
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