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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 LU ; Nakaegawa, Toshiyuki; Pfister, Patrik L.; Döring, Michael and Leuenberger, Markus, et al. (2017) In Scientific Reports 7(1).
Abstract

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... (More)

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.

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Scientific Reports
volume
7
issue
1
publisher
Nature Publishing Group
external identifiers
  • scopus:85018756690
  • wos:000400491700017
ISSN
2045-2322
DOI
10.1038/s41598-017-01451-7
language
English
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yes
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f5ca9e77-dcac-49b1-98b6-c977abfbed27
date added to LUP
2017-05-23 10:13:59
date last changed
2017-09-18 11:36:48
@article{f5ca9e77-dcac-49b1-98b6-c977abfbed27,
  abstract     = {<p>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<sup>+</sup> and Na<sup>+</sup> ions in the GISP2 ice core (proxies for atmospheric circulation patterns), and δ<sup>18</sup>O 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.</p>},
  articleno    = {1441},
  author       = {Kobashi, Takuro and Menviel, Laurie and Jeltsch-Thömmes, Aurich and Vinther, Bo M and Box, Jason E. and Muscheler, Raimund and Nakaegawa, Toshiyuki and Pfister, Patrik L. and Döring, Michael and Leuenberger, Markus and Wanner, Heinz and Ohmura, Atsumu},
  issn         = {2045-2322},
  language     = {eng},
  month        = {12},
  number       = {1},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {Volcanic influence on centennial to millennial Holocene Greenland temperature change},
  url          = {http://dx.doi.org/10.1038/s41598-017-01451-7},
  volume       = {7},
  year         = {2017},
}