GRIP Deuterium Excess Reveals Rapid and Orbital-Scale Changes in Greenland Moisture Origin

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 δ18O and 5D Greenland Ice Core Project...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2005-07, Vol.309 (5731), p.118-121
Main Authors: Masson-Delmotte, V., Jouzel, J., Landais, A., Stievenard, M., Johnsen, S. J., White, J. W. C., Werner, M., Sveinbjornsdottir, A., Fuhrer, K.
Format: Article
Language:English
Subjects:
Atmospheric water
Axial tilt
Causes of
Climate
Climate change
Climate models
Climatic changes
Continental interfaces, environment
Deuterium
Earth sciences
Earth, ocean, space
Environmental aspects
Exact sciences and technology
Fractionation
Geographic Location
Hydrologic analysis
Ice
Ice caps
Ice cores
Ice sheets
Isotope geochemistry
Isotope geochemistry. Geochronology
Isotopes
Marine and continental quaternary
Ocean, Atmosphere
Oceans
Precipitation
Profiles
Sciences of the Universe
Surficial geology
Temperature gradients
Temperature scales
Water
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Summary: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 δ18O and 5D 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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1108575