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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 (down) 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.
Programme 458
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ISSN 0036-8075 ISBN Medium
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Notes 10.1126/science.1108575 Approved yes
Call Number IPEV @ Thierry.Lemaire @ Serial 5507
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