The response of atmospheric nitrous oxide to climate variations during the last glacial period

Schilt, Adrian; Baumgartner, Matthias; Eicher, Olivier; Chappellaz, J.; Schwander, Jakob; Fischer, Hubertus; Stocker, Thomas (2013). The response of atmospheric nitrous oxide to climate variations during the last glacial period. Geophysical Research Letters, 40(9), pp. 1888-1893. American Geophysical Union 10.1002/grl.50380

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Detailed insight into natural variations of the greenhouse gas nitrous oxide (N2O) in response to changes in the Earth's climate system is provided by new measurements along the ice core of the North Greenland Ice Core Project (NGRIP). The presented record reaches from the early Holocene back into the previous interglacial with a mean time resolution of about 75 years. Between 11 and 120 kyr BP, atmospheric N2O concentrations react substantially to the last glacial-interglacial transition (Termination 1) and millennial time scale climate variations of the last glacial period. For long-lasting Dansgaard/Oeschger (DO) events, the N2O increase precedes Greenland temperature change by several hundred years with an increase rate of about 0.8-1.3 ppbv/century, which accelerates to about 3.8-10.7 ppbv/century at the time of the rapid warming in Greenland. Within each bundle of DO events, the new record further reveals particularly low N2O concentrations at the approximate time of Heinrich events. This suggests that the response of marine and/or terrestrial N2O emissions on a global scale are different for stadials with and without Heinrich events.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Schilt, Adrian; Baumgartner, Matthias; Eicher, Olivier; Schwander, Jakob; Fischer, Hubertus and Stocker, Thomas

Subjects:

500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Doris Rätz

Date Deposited:

29 Sep 2014 14:29

Last Modified:

18 Sep 2015 15:06

Publisher DOI:

10.1002/grl.50380

Web of Science ID:

000320317500040

BORIS DOI:

10.7892/boris.47724

URI:

https://boris.unibe.ch/id/eprint/47724

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