Sea surface temperature and sea ice variability in the subpolar North Atlantic from explosive volcanism of the late thirteenth century

Sicre, M.-A.; Khodri, M.; Mignot, J.; Eiríksson, J.; Knudsen, K.-L.; Ezat, U.; Closset, I.; Nogues, P.; Massé, G. (2013). Sea surface temperature and sea ice variability in the subpolar North Atlantic from explosive volcanism of the late thirteenth century. Geophysical Research Letters, 40(20), pp. 5526-5530. American Geophysical Union 10.1002/2013GL057282

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In this study, we use IP and alkenone biomarker proxies to document the subdecadal variations of sea ice and sea surface temperature in the subpolar North Atlantic induced by the decadally paced explosive tropical volcanic eruptions of the second half of the thirteenth century. The short- and long-term evolutions of both variables were investigated by cross analysis with a simulation of the IPSL-CM5A LR model. Our results show short-term ocean cooling and sea ice expansion in response to each volcanic eruption. They also highlight that the long response time of the ocean leads to cumulative surface cooling and subsurface heat buildup due to sea ice capping. As volcanic forcing relaxes, the surface ocean rapidly warms, likely amplified by subsurface heat, and remains almost ice free for several decades

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics

UniBE Contributor:

Mignot, Juliette

Subjects:

500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Doris Rätz

Date Deposited:

29 Jan 2015 10:51

Last Modified:

18 Sep 2015 15:00

Publisher DOI:

10.1002/2013GL057282

BORIS DOI:

10.7892/boris.62574

URI:

https://boris.unibe.ch/id/eprint/62574

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