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Volcanic influence ...
Volcanic influence on centennial to millennial Holocene Greenland temperature change
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- Kobashi, Takuro (författare)
- University of Bern
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- Menviel, Laurie (författare)
- University of New South Wales,ARC Centre of Excellence for Climate System
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- Jeltsch-Thömmes, Aurich (författare)
- University of Bern
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- Vinther, Bo M (författare)
- University of Copenhagen
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- Box, Jason E. (författare)
- Geological Survey of Denmark and Greenland, Copenhagen, Denmark
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- Muscheler, Raimund (författare)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science
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- Nakaegawa, Toshiyuki (författare)
- Meteorological Research Institute (MRI), Japan
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- Pfister, Patrik L. (författare)
- University of Bern
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- Döring, Michael (författare)
- University of Bern
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- Leuenberger, Markus (författare)
- University of Bern
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- Wanner, Heinz (författare)
- University of Bern
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- Ohmura, Atsumu (författare)
- ETH Zürich
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(creator_code:org_t)
- 2017-05-03
- 2017
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 7:1
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.nature.c...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
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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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
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Kobashi, Takuro
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Menviel, Laurie
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Jeltsch-Thömmes, ...
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Vinther, Bo M
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Box, Jason E.
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Muscheler, Raimu ...
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Nakaegawa, Toshi ...
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Pfister, Patrik ...
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Döring, Michael
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Leuenberger, Mar ...
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Wanner, Heinz
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Ohmura, Atsumu
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