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The Niels Bohr Institute is a research institute of the University of Copenhagen. The research of the institute spans astronomy, geophysics, nanotechnology, particle physics, quantum mechanics, and biophysics.
An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier. Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years. Cores are drilled with hand augers or powered drills; they can reach depths of over two miles (3.2 km), and contain ice up to 800,000 years old.
The Last Interglacial, also known as the Eemian, was the interglacial period which began about 130,000 years ago at the end of the Penultimate Glacial Period and ended about 115,000 years ago at the beginning of the Last Glacial Period. It corresponds to Marine Isotope Stage 5e. It was the second-to-latest interglacial period of the current Ice Age, the most recent being the Holocene which extends to the present day. During the Last Interglacial, the proportion of CO2 in the atmosphere was about 280 parts per million. The Last Interglacial was one of the warmest periods of the last 800,000 years, with temperatures comparable to and at times warmer than the contemporary Holocene interglacial, with the maximum sea level being up to 6 to 9 metres higher than at present, with global ice volume likely also being smaller than the Holocene interglacial.
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The Greenland Ice Sheet Project (GISP) was a decade-long project to drill ice cores in Greenland that involved scientists and funding agencies from Denmark, Switzerland and the United States. Besides the U.S. National Science Foundation (NSF), funding was provided by the Swiss National Science Foundation and the Danish Commission for Scientific Research in Greenland. The ice cores provide a proxy archive of temperature and atmospheric constituents that help to understand past climate variations.
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References
- 1 2 3 4 Dahl-Jensen, Dorthe (2007-09-10). "Dorthe Dahl-Jensen". University of Copenhagen.
- ↑ "Niels Bohr Institute". University of Copenhagen. 2007-09-10.
- ↑ Dansgaard, W. (2004). Frozen Annals: Greenland Ice Cap Research (PDF). Odder, Denmark: Narayana Pres. p. 90. ISBN 87-990078-0-0.
1980 was the year we found two youngsters (and they each other), who should later become prominent participants in our glaciological research: Dorthe Dahl-Jensen and Jørgen Peder Steffensen, both developing very well in teaching and research, she strongest in theory, he in practice and experiment.
- ↑ Gertner, Jon (2020). The Ice at the End of the World: An Epic Journey Into Greenland's Buried Past and Our Perilous Future. US: Random House Publishing Group. p. 211. ISBN 9780812986549.
Dansgaard had an arbitrary rule that reflected the hidebound traditions of his field: no women could come to the drilling camp. But he had relented in this [Dahl-Jensen's] case.
- 1 2 "Drilling at Dye 3". Niels Bohr Institute. 12 September 2014. Retrieved 9 July 2021.
In 2007, she was appointed as head of Willi Dansgaard's old department – which is now called the 'Centre for Ice and Climate' and under her leadership it remains one of the world's leading research institutes in the climate field – moreover with a gender distribution that is almost 50/50.
- ↑ Kolbert, Elizabeth (December 30, 2001). "Ice Memory". The New Yorker. Retrieved July 7, 2021.
Steffensen...pointed out that, if you believed the climate to be inherently unstable, the last thing you'd want to do is conduct a vast unsupervised experiment on it
- ↑ NEEM community members (24 January 2013). "Eemian interglacial reconstructed from a Greenland folded ice core" (PDF). Nature. 493 (7433): 489–494. Bibcode:2013Natur.493..489N. doi:10.1038/nature11789. PMID 23344358. S2CID 4420908.
- ↑ Carrington, Damian (May 17, 2021). "Greenland ice sheet on brink of major tipping point, says study". The Guardian. Retrieved July 6, 2021.
- ↑ "Dorthe Dahl-Jensen - Louis Agassiz Medal -". European Geosciences Union (EGU). Retrieved 2015-10-24.
- ↑ member profile Archived 2015-12-22 at the Wayback Machine ; retrieved 2015-12-17
- ↑ "Dorthe Dahl-Jensen". Member. Academia Europaea. Retrieved 2024-09-08.
- ↑ BBVA Foundation Frontiers of Knowledge Award 2023
