A global picture of the first abrupt climatic event occurring during the last glacial inceptionShow others and affiliations
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2012 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 39, article id L15703Article in journal (Refereed) Published
Abstract [en]
The orbital-scale transition from the last interglacial to glacial climate corresponds to the progressive organization of global millennial-scale climate variability. Here, we investigate the structure and the global fingerprint of the first warming event occurring during the last glacial inception, the Greenland InterStadial 25 (GIS 25). Using centennial to decadal-resolution measurements of delta O-18 and delta D in the ice together with delta N-15, delta O-18(2) and CH4 in the trapped air, we show that GIS 25 does not coincide with large environmental changes at lower latitudes. Such an equivocal fingerprint questions whether GIS 25 is simply a smaller amplitude version of later rapid events or whether it reflects a more regional northern hemisphere origin for the initiation of the millennial-scale climatic variability. After this ambiguous first rapid event, the onset of the global millennial-scale variability - characteristic of the last glacial period-occurs as a short (300 years) event ending GIS 25.
Place, publisher, year, edition, pages
2012. Vol. 39, article id L15703
Keywords [en]
meridional overturning circulation orbital-scale changes greenland ice core epica dome-c millennial-scale north-atlantic polar ice thermohaline circulation interglacial warmth variability 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-1890DOI: 10.1029/2012gl052656OAI: oai:DiVA.org:polar-1890DiVA, id: diva2:810833
Note
ISI Document Delivery No.: 988FQ Times Cited: 6 Cited Reference Count: 53 Capron, E. Landais, A. Chappellaz, J. Buiron, D. Fischer, H. Johnsen, S. J. Jouzel, J. Leuenberger, M. Masson-Delmotte, V. Stocker, T. F. Chappellaz, Jerome/A-4872-2011; Masson-Delmotte, Valerie/G-1995-2011; Fischer, Hubertus/A-1211-2014; Stocker, Thomas/B-1273-2013 Masson-Delmotte, Valerie/0000-0001-8296-381X; Fischer, Hubertus/0000-0002-2787-4221; Denmark (SNF); Belgium (FNRS-CFB); France (IPEV and INSU/CNRS); Germany (AWI); Iceland (RannIs); Japan (MEXT); Sweden (SPRS); Switzerland (SNF); USA (NSF, Office of Polar Programs); ANR PICC; ANR NEEM; European Commission [243908] We thank Nerilie Abram and Eric Wolff for their useful comments on an early version of this paper. This work is a contribution to the North Greenland Ice Core Project (NGRIP) directed and organized by the Department of Geophysics at the Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen. It 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 USA (NSF, Office of Polar Programs). This work was supported by ANR PICC and ANR NEEM and by funding to the Past4Future project from the European Commission's 7th Framework Programme, grant 243908. This work is LSCE contribution 4823 and is Past4Future contribution 23. 7 Amer geophysical union Washington Geosciences, Multidisciplinary
2015-05-082015-05-062017-12-04Bibliographically approved