Dansgaard grew up in Copenhagen, to parents who owned an engraving shop. In 1947, he graduated from the University of Copenhagen, winning a gold medal for his thesis on X-ray dosimetry.[3]
After several years of research, including some at sites in Greenland, Dansgaard returned to the University of Copenhagen's Biophysics Laboratory, where he developed its mass spectrometer to analyse water isotopes. According to his student Jørgen Peder Steffensen:[3]
In June 1952, Dansgaard made a discovery that came to influence the rest of his scientific career. He discovered that it was possible to determine the temperature of the precipitating clouds by analysing the stable isotopic composition of rain water. In the following 12 years, he systematically collected water samples from all over the world in collaboration with the Danish East Asia Company, contacts in Greenland, a French expedition under Paul Emile Victor and later the International Atomic Energy Agency and World Meteorological Organization.
Overviewedit
Dansgaard 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.[4]
He was the first scientist to extract palaeoclimatic information from the American Camp Century ice core from Greenland drilled by the US army Cold Regions Research and Engineering Laboratory (CRREL). Dansgaard also took a leading role in the drilling of the first ice core to bedrock for scientific reasons, the DYE-3 core from South Greenland, 1,400 kilometres (870 mi) from the Camp Century. Confirming findings from the analysis of the Camp Century ice core, the DYE-3 climate profile documented the existence of rapid climate change, during and at the end of the last glacial. The repeated events of abrupt climate change during the glacial are named after Willi Dansgaard and his Swiss colleague, Hans Oeschger, and are known as Dansgaard-Oeschger events.
^II, Thomas H. Maugh (7 February 2011). "Willi Dansgaard dies at 88; scientist who recognized climate record in ice cap" – via LA Times.
^. Archived from the original on 2011-01-14. Retrieved 2011-01-14.
^ abSteffensen, Jørgen Peder (24 March 2011). "Willi Dansgaard". Polar Record. 48 (2): 206–207. doi:10.1017/S0032247411000155. S2CID 233320475. Retrieved 9 July 2021. Willi Dansgaard, a great pioneer of climate research, died on 8 January 2011 at the age of 88. He was born on 30 August 1922 and grew up in the centre of Copenhagen where his parents had an engraving shop. He finished his university degree in physics, mathematics and astronomy in 1947 with a gold medal award for a thesis on X-ray dosimetry at the Biophysics Laboratory of the University of Copenhagen.
^Martin, Douglas (January 28, 2011). "Willi Dansgaard Dies at 88; Read Climates in Old Ice". NY Times. Retrieved February 6, 2022. He discovered that as clouds rise and cool, heavier forms of oxygen (or isotopes — those with more neutrons) will react to the cold sooner, condensing and falling back to earth as precipitation before lighter ones do; a preponderance of heavier oxygen molecules would then indicate colder atmospheric temperatures.
^ "The Seligman Crystal". International Glaciological Society. Retrieved 30 November 2016.[permanent dead link]
External linksedit
- photo of Dansgaard, Chester C. Langway and Hans Oeschger
willi, dansgaard, august, 1922, january, 2011, danish, paleoclimatologist, professor, emeritus, geophysics, university, copenhagen, member, royal, danish, academy, science, letters, royal, swedish, academy, sciences, icelandic, academy, sciences, danish, geoph. Willi Dansgaard 30 August 1922 1 8 January 2011 2 was a Danish paleoclimatologist He was 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 Willi DansgaardBorn 1922 08 30 30 August 1922Copenhagen DenmarkDied8 January 2011 2011 01 08 aged 88 Copenhagen DenmarkNationalityDanishScientific careerFieldsPaleoclimatologyInstitutionsCopenhagen University Contents 1 Early life and career 2 Overview 3 Awards 4 Notes 5 External linksEarly life and career editDansgaard grew up in Copenhagen to parents who owned an engraving shop In 1947 he graduated from the University of Copenhagen winning a gold medal for his thesis on X ray dosimetry 3 After several years of research including some at sites in Greenland Dansgaard returned to the University of Copenhagen s Biophysics Laboratory where he developed its mass spectrometer to analyse water isotopes According to his student Jorgen Peder Steffensen 3 In June 1952 Dansgaard made a discovery that came to influence the rest of his scientific career He discovered that it was possible to determine the temperature of the precipitating clouds by analysing the stable isotopic composition of rain water In the following 12 years he systematically collected water samples from all over the world in collaboration with the Danish East Asia Company contacts in Greenland a French expedition under Paul Emile Victor and later the International Atomic Energy Agency and World Meteorological Organization Overview editDansgaard 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 4 He was the first scientist to extract palaeoclimatic information from the American Camp Century ice core from Greenland drilled by the US army Cold Regions Research and Engineering Laboratory CRREL Dansgaard also took a leading role in the drilling of the first ice core to bedrock for scientific reasons the DYE 3 core from South Greenland 1 400 kilometres 870 mi from the Camp Century Confirming findings from the analysis of the Camp Century ice core the DYE 3 climate profile documented the existence of rapid climate change during and at the end of the last glacial The repeated events of abrupt climate change during the glacial are named after Willi Dansgaard and his Swiss colleague Hans Oeschger and are known as Dansgaard Oeschger events Awards edit1971 Hans Egede Medal 1975 Swedish Society for Anthropology and Geography s Vega medal 1976 Seligman Crystal from the International Glaciological Society 5 1995 Royal Swedish Academy of Sciences Crafoord Prize 1996 Tyler Prize for Environmental Achievement 1996Notes edit II Thomas H Maugh 7 February 2011 Willi Dansgaard dies at 88 scientist who recognized climate record in ice cap via LA Times Nekrolog Professor emer Dr Phil Willi Dansgaard er dod Archived from the original on 2011 01 14 Retrieved 2011 01 14 a b Steffensen Jorgen Peder 24 March 2011 Willi Dansgaard Polar Record 48 2 206 207 doi 10 1017 S0032247411000155 S2CID 233320475 Retrieved 9 July 2021 Willi Dansgaard a great pioneer of climate research died on 8 January 2011 at the age of 88 He was born on 30 August 1922 and grew up in the centre of Copenhagen where his parents had an engraving shop He finished his university degree in physics mathematics and astronomy in 1947 with a gold medal award for a thesis on X ray dosimetry at the Biophysics Laboratory of the University of Copenhagen Martin Douglas January 28 2011 Willi Dansgaard Dies at 88 Read Climates in Old Ice NY Times Retrieved February 6 2022 He discovered that as clouds rise and cool heavier forms of oxygen or isotopes those with more neutrons will react to the cold sooner condensing and falling back to earth as precipitation before lighter ones do a preponderance of heavier oxygen molecules would then indicate colder atmospheric temperatures The Seligman Crystal International Glaciological Society Retrieved 30 November 2016 permanent dead link External links edit photo of Dansgaard Chester C Langway and Hans Oeschger Dansgaard s 2005 autobiography Frozen Annals Greenland Ice Sheet Research Carbon Dioxide Through the Ice Ages from UCSD archived 2004 History of Danish ice core research from Niels Bohr Institute archived 2009 nbsp nbsp nbsp This article about a Danish scientist is a stub You can help Wikipedia by expanding it vte nbsp This biographical article about a climatologist or meteorologist is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Willi Dansgaard amp oldid 1170434973, wikipedia, wiki, book, books, library,
