globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.03.028
论文题名:
A diatom-based sea-ice reconstruction for the Vaigat Strait (Disko Bugt, West Greenland) over the last 5000yr
作者: Sha L.; Jiang H.; Seidenkrantz M.-S.; Knudsen K.L.; Olsen J.; Kuijpers A.; Liu Y.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 403
起始页码: 66
结束页码: 79
语种: 英语
英文关键词: Diatoms ; Holocene ; Sea-ice concentration (SIC) ; Transfer function ; West Greenland
英文摘要: A diatom-based sea-ice concentration (SIC) transfer function was developed by using 72 surface samples from west of Greenland and around Iceland, and validated against associated modern SIC. Canonical correspondence analysis on surface sediment diatoms and monthly average of SIC indicated that April SIC is the most important environmental factor controlling the distribution of diatoms in the area, justifying the development of a diatom-based SIC transfer function. The agreement between reconstructed SIC based on diatoms from West Greenland and the satellite and modelled sea-ice data during the last ~. 75. yr suggests that the diatom-based SIC reconstruction is reliable for studying the palaeoceanography off West Greenland.Relatively warm conditions with a strong influence of the Irminger Current (IC) were indicated for the early part of the record (~. 5000-3860. cal. yr BP), corresponding in time to the latest part of the Holocene Thermal Maximum. Between 3860 and 1510. cal. yr BP, April SIC oscillated around the mean value (55%) and during the time interval 1510-1120. cal. yr BP and after 650. cal. yr BP was above the mean, indicating more extensive sea-ice cover in Disko Bugt.Agreement between reconstructed April SIC and changes in the diatom species suggests that the sea-ice condition in Disko Bugt was strongly influenced by variations in the relative strength of two components of the West Greenland Current, i.e. the cold East Greenland Current and the relatively warm IC. Further analysis of the reconstructed SIC record suggests that solar radiation may be an important forcing mechanism behind the historic sea-ice changes. © 2014 Elsevier B.V.
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被引频次[WOS]:34   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69351
Appears in Collections:过去全球变化的重建

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作者单位: Key Laboratory of Geographic Information Science, East China Normal University, 200062 Shanghai, China; Centre for Past Climate Studies and Arctic Research Centre, Department of Geoscience, Aarhus University, DK-8000 Aarhus C, Denmark; State Key Laboratory of Estuarine and Coastal Research, Key Laboratory of Geographic Information Science, East China Normal University, 200062 Shanghai, China; Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark; Geological Survey of Denmark and Greenland (GEUS), 1350 Copenhagen, Denmark; Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, SOA, 266061 Qingdao, China

Recommended Citation:
Sha L.,Jiang H.,Seidenkrantz M.-S.,et al. A diatom-based sea-ice reconstruction for the Vaigat Strait (Disko Bugt, West Greenland) over the last 5000yr[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,403
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