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

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 i...

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Bibliographic Details
Main Authors: Schwander, Jakob, Baumgartner, Matthias, Chappellaz, J., Schilt, Adrian, Eicher, Olivier, Stocker, Thomas, Fischer, Hubertus
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2013
Subjects:
530 Physics
Greenland
Greenland ice core
Greenland Ice core Project
ice core
NGRIP
North Greenland
North Greenland Ice Core Project
Online Access:https://dx.doi.org/10.7892/boris.47724
http://boris.unibe.ch/47724/
Description
Summary: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 ...

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