DOI: 10.1029/2012JD018603
论文题名: A new bipolar ice core record of volcanism from WAIS Divide and NEEM and implications for climate forcing of the last 2000 years
作者: Sigl M. ; McConnell J.R. ; Layman L. ; Maselli O. ; McGwire K. ; Pasteris D. ; Dahl-Jensen D. ; Steffensen J.P. ; Vinther B. ; Edwards R. ; Mulvaney R. ; Kipfstuhl S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1151
结束页码: 1169
语种: 英语
英文关键词: explosive volcanism
; ice cores
; Kuwae
; Taupo
; volcanic forcing
; WAIS timescale
Scopus关键词: Deposition
; Forestry
; Volcanoes
; Explosive volcanism
; Ice core
; Kuwae
; Taupo
; Time-scales
; Volcanic forcing
; Ice
; anthropogenic effect
; climate forcing
; climate variation
; ice core
; mass spectrometry
; seasonal variation
; spatial variation
; sulfur
; timescale
; volcanic eruption
; volcanism
; Antarctica
; Arctic
; Greenland
; Azadirachta indica
英文摘要: Volcanism is a natural climate forcing causing short-term variations in temperatures. Histories of volcanic eruptions are needed to quantify their role in climate variability and assess human impacts. We present two new seasonally resolved, annually dated non-sea-salt sulfur records from polar ice cores - WAIS Divide (WDC06A) from West Antarctica spanning 408 B.C.E. to 2003 C.E. and NEEM (NEEM-2011-S1) from Greenland spanning 78 to 1997 C.E. - both analyzed using high-resolution continuous flow analysis coupled to two mass spectrometers. The high dating accuracy allowed placing the large bi-hemispheric deposition event ascribed to the eruption of Kuwae in Vanuatu (previously thought to be 1452/1453 C.E. and used as a tie-point in ice core dating) into the year 1458/1459 C.E. This new age is consistent with an independent ice core timescale from Law Dome and explains an apparent delayed response in tree rings to this volcanic event. A second volcanic event is detected in 1453 C.E. in both ice cores. We show for the first time ice core signals in Greenland and Antarctica from the strong eruption of Taupo in New Zealand in 232 C.E. In total, 133 volcanic events were extracted from WDC06A and 138 from NEEM-2011-S1, with 50 ice core signals - predominantly from tropical source volcanoes - identified simultaneously in both records. We assess the effect of large bipolar events on temperature-sensitive tree ring proxies. These two new volcanic records, synchronized with available ice core records to account for spatial variability in sulfate deposition, provide a basis for improving existing time series of volcanic forcing. ©2012. American Geophysical Union. All Rights Reserved. 资助项目: 0230396
; 0440817
; 0538427
; 0839093
; 0909541
; 0944266
; 0944348
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63932
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Division of Hydrologic Sciences, Desert Research Institute, 89512 Raggio Parkway, Reno, NV 89512, United States; Center for Ice and Climate, Niels Bohr Institute University of Copenhagen, Copenhagen, Denmark; Department of Physics, Curtin University, Perth, Australia; British Antarctic Survey, Madingley Road High Cross, Cambridge, Cambridgeshire, United Kingdom; Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven, Germany
Recommended Citation:
Sigl M.,McConnell J.R.,Layman L.,et al. A new bipolar ice core record of volcanism from WAIS Divide and NEEM and implications for climate forcing of the last 2000 years[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)