globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2017.11.036
Scopus记录号: 2-s2.0-85038830911
论文题名:
First identification of cryptotephra from the Kamchatka Peninsula in a Greenland ice core: Implications of a widespread marker deposit that links Greenland to the Pacific northwest
作者: Cook E.; Portnyagin M.; Ponomareva V.; Bazanova L.; Svensson A.; Garbe-Schönberg D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 181
起始页码: 200
结束页码: 206
语种: 英语
英文关键词: Cryptotephra ; Greenland ice core ; Isochron ; Kamchatka ; Khangar ; NGRIP
Scopus关键词: Deposits ; Cryptotephra ; Greenland ice cores ; Isochron ; Kamchatka ; Khangar ; NGRIP ; Ice ; concentration (composition) ; cooling ; environmental change ; geochronology ; historical record ; Holocene ; identification method ; marker bed ; sampling ; tephra ; tephrochronology ; Arctic ; Greenland ; Kamchatka ; Kamchatka Peninsula ; Pacific Ocean ; Pacific Ocean (Northwest) ; Russian Federation
英文摘要: Contiguous sampling of Holocene ice from the NGRIP core, Greenland, has revealed a new rhyolitic cryptotephra that is geochemically identical to the KHG tephra, a widespread marker deposit originating from the Khangar volcano, Kamchatka. This is the first identification of tephra from the Kamchatka Peninsula in Greenland ice and the first finding of the KHG tephra outside Kamchatka. The NGRIP KHG has an age of 7872 ± 50 a BP 1950, and this date will help improve age models for Kamchatka, where existing age estimates of KHG are too young, thus highlighting the importance of locating long-range, low-concentration cryptotephra deposits in well-dated ice cores. In Greenland KHG is located close to the termination of the 8.2 ka BP cooling event that is also a climate feature in palaeo-records of Kamchatka. This tie-point therefore provides a unique opportunity to synchronise records of environmental change in distal locations. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112312
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作者单位: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 302100, Denmark; GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, Kiel, 24148, Germany; Institute of Volcanology and Seismology, Piip Blvd, 9, Petropavlovsk-Kamchatsky, 683006, Russian Federation; Christian-Albrechts-Universität zu Kiel, Christian-Albrechts-Platz 4, Kiel, 24118, Germany

Recommended Citation:
Cook E.,Portnyagin M.,Ponomareva V.,et al. First identification of cryptotephra from the Kamchatka Peninsula in a Greenland ice core: Implications of a widespread marker deposit that links Greenland to the Pacific northwest[J]. Quaternary Science Reviews,2018-01-01,181
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