Volcanic influence on centennial to millennial Holocene Greenland temperature change

Kobashi, Takuro; Menviel, Laurie; Jeltsch-Thömmes, Aurich; Vinther, Bo M.; Box, Jason E.; Muscheler, Raimund; Nakaegawa, Toshiyuki; Pfister, Patrik; Döring, Michael; Leuenberger, Markus; Wanner, Heinz; Ohmura, Atsumu (2017). Volcanic influence on centennial to millennial Holocene Greenland temperature change. Scientific Reports, 7(1) Nature Publishing Group 10.1038/s41598-017-01451-7

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Solar variability has been hypothesized to be a major driver of North Atlantic millennial-scale climate variations through the Holocene along with orbitally induced insolation change. However, another important climate driver, volcanic forcing has generally been underestimated prior to the past 2,500 years partly owing to the lack of proper proxy temperature records. Here, we reconstruct seasonally unbiased and physically constrained Greenland Summit temperatures over the Holocene using argon and nitrogen isotopes within trapped air in a Greenland ice core (GISP2). We show that a series of volcanic eruptions through the Holocene played an important role in driving centennial to millennial-scale temperature changes in Greenland. The reconstructed Greenland temperature exhibits significant millennial correlations with K+ and Na+ ions in the GISP2 ice core (proxies for atmospheric circulation patterns), and δ18O of Oman and Chinese Dongge cave stalagmites (proxies for monsoon activity), indicating that the reconstructed temperature contains hemispheric signals. Climate model simulations forced with the volcanic forcing further suggest that a series of large volcanic eruptions induced hemispheric-wide centennial to millennial-scale variability through ocean/sea-ice feedbacks. Therefore, we conclude that volcanic activity played a critical role in driving centennial to millennial-scale Holocene temperature variability in Greenland and likely beyond.

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)
08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science

Graduate School:

Graduate School of Climate Sciences

UniBE Contributor:

Kobashi, Takuro; Jeltsch-Thömmes, Aurich; Pfister, Patrik; Leuenberger, Markus and Wanner, Heinz

Subjects:

500 Science > 530 Physics
500 Science > 550 Earth sciences & geology

ISSN:

2045-2322

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

06 Jun 2017 10:34

Last Modified:

23 Jul 2018 14:17

Publisher DOI:

10.1038/s41598-017-01451-7

Additional Information:

Correction 2018, vol. 8, article 4292: 10.1038/s41598-018-21307-y

BORIS DOI:

10.7892/boris.99627

URI:

https://boris.unibe.ch/id/eprint/99627

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