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The response of atmospheric nitrous oxide to climate variations during the last glacial period
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2013 (English)In: Geophysical Research Letters, ISSN 0094-8276, Vol. 40Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2013. Vol. 40
Keyword [en]
millennial-scale north-atlantic ocean circulation late pleistocene ice cores n2o record variability lifetimes monsoon Geology
Research subject
SWEDARCTIC 1997, NordGRIP 1997; SWEDARCTIC 1998, NordGRIP 1998; SWEDARCTIC 1999, NordGRIP 1999; SWEDARCTIC 2000, NordGRIP 2000; SWEDARCTIC 2001, NordGRIP 2001; SWEDARCTIC 2002, NordGRIP 2002; SWEDARCTIC 2003, NordGRIP 2003; SWEDARCTIC 2004, NordGRIP 2004
Identifiers
URN: urn:nbn:se:polar:diva-1928DOI: 10.1002/grl.50380OAI: oai:DiVA.org:polar-1928DiVA: diva2:810362
Note

ISI Document Delivery No.: 163EC Times Cited: 1 Cited Reference Count: 40 Schilt, Adrian Baumgartner, Matthias Eicher, Olivier Chappellaz, Jerome Schwander, Jakob Fischer, Hubertus Stocker, Thomas F. Chappellaz, Jerome/A-4872-2011; Fischer, Hubertus/A-1211-2014; Stocker, Thomas/B-1273-2013 Fischer, Hubertus/0000-0002-2787-4221; University of Bern; Swiss National Science Foundation; Denmark (SNF); Belgium (FNRS-CFB); France (IPEV); France (INSU/CNRS); Germany (AWI); Iceland (RannIs); Japan (MEXT); Sweden (SPRS); Switzerland (SNF); United States of America (NSF); United States of America (Office of Polar Programs) We appreciate discussions with E. Brook, S. Jaccard, A. Schmittner, and B. Stocker. Comments of two anonymous reviewers helped to improve this manuscript. This work was supported by the University of Bern and the Swiss National Science Foundation. It is a contribution to the North Greenland Ice Core Project (NGRIP) which is directed and organized by the Department of Geophysics at the Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen. NGRIP is supported by funding agencies in Denmark (SNF), Belgium (FNRS-CFB), France (IPEV and INSU/CNRS), Germany (AWI), Iceland (RannIs), Japan (MEXT), Sweden (SPRS), Switzerland (SNF), and the United States of America (NSF, Office of Polar Programs). 1 Amer geophysical union Washington Geosciences, Multidisciplinary

Available from: 2015-05-07 Created: 2015-05-06 Last updated: 2015-06-16

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CiteExportLink to record
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