DOI: 10.5194/cp-10-393-2014
Scopus记录号: 2-s2.0-84897639342
论文题名: Accumulation reconstruction and water isotope analysis for 1736–1997 of an ice core from the Ushkovsky volcano, Kamchatka, and their relationships to North Pacific climate records
作者: Sato T. ; Shiraiwa T. ; Greve R. ; Seddik H. ; Edelmann E. ; Zwinger T.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 1 起始页码: 393
结束页码: 404
语种: 英语
Scopus关键词: accumulation rate
; climate modeling
; firn
; gyre
; hydrogen isotope
; ice core
; marine atmosphere
; moraine
; paleoclimate
; proxy climate record
; reconstruction
; sea surface temperature
; Kamchatka
; Pacific Ocean
; Pacific Ocean (North)
; Russian Federation
; Ushkovsky Volcano
英文摘要: An ice core was retrieved in June 1998 from the Gorshkov crater glacier at the top of the Ushkovsky volcano, in central Kamchatka. This ice core is one of only two recovered from Kamchatka so far, thus filling a gap in the regional instrumental climate network. Hydrogen isotope (δD) analyses and past accumulation reconstructions were conducted for the top 140.7 m of the core, spanning 1736-1997. Two accumulation reconstruction methods were developed and applied with the Salamatin and the Elmer/Ice firn-ice dynamics models, revealing a slightly increasing or nearly stable trend, respectively. Wavelet analysis shows that the ice core records have significant decadal and multi-decadal variabilities at different times. Around 1880 the multi-decadal variability of δD became lost and its average value increased by 6‰. The multi-decadal variability of reconstructed accumulation rates changed at around 1850. Reconstructed accumulation variations agree with ages of moraines in Kamchatka. Ice core signals were significantly correlated with North Pacific sea surface temperature (SST) and surface temperature (2 m temperature). δD correlates with the North Pacific Gyre Oscillation (NPGO) index after the climate regime shift in 1976/1977, but not before that. Therefore, our findings imply that the ice core record contains various information on the local, regional and large-scale climate variability in the North Pacific region. Understanding all detailed mechanisms behind the time-dependent connections between these climate patterns is challenging and requires further efforts towards multi-proxy analysis and climate modelling. © 2014 Author(s). 资助项目: JSPS, Japan Society for the Promotion of Science
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49306
Appears in Collections: 气候变化与战略
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Recommended Citation:
Sato T.,Shiraiwa T.,Greve R.,et al. Accumulation reconstruction and water isotope analysis for 1736–1997 of an ice core from the Ushkovsky volcano, Kamchatka, and their relationships to North Pacific climate records[J]. Climate of the Past,2014-01-01,10(1)