Willi Dansgaard
Encyclopedia : W : WI : WIL : Willi Dansgaard
Willi Dansgaard (born 1922) is a Danish paleoclimatologist. He is Professor Emeritus of Geophysics at the University of Copenhagen and a member of the Royal Danish Academy of Science and Letters, the Royal Swedish Academy of Sciences, the Icelandic Academy of Sciences, and the Danish Geophysical Society.
He was the first paleoclimatologist to demonstrate that measurements of the trace isotopes oxygen-18 and deuterium in accumulated glacier ice could be used as an indicator of past climate. Dansgaard was the first to note deuterium excess, or a water sample's deviation from the global meteoric water line (GMWL) in ice cores. He found that the kinetic differences between hydrogen-1 and deuterium related to the temperature of source water, and the absolute humidity.
In 1966 he took part in the first polar deep ice core drilling expedition, the American Camp Century ice core from Greenland. Dansgaard also took a leading role drilling the first ice core to bedrock, 1400 km away from the Camp Century core at Dye 3. Analyses from this core, showed rapid climate change, during and at the end of the last ice known as Dansgaard-Oeschger events.
Awards
- Tyler Prize for Environmental Achievement, [1996]
- Royal Swedish Academy of Sciences Crafoord Prize, 1995
- International Glaciological Society's Seligman Crystal
- Swedish Society of Geography and Anthropology's Vega medal
External links
- http://content.aip.org/products/esva/Dansgaard_Willi.html - photo of Dansgaard, Chester C. Langway and Hans Oeschger
- http://calspace.ucsd.edu/virtualmuseum/climatechange2/07_2.shtml
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.