DOI: 10.1016/j.palaeo.2013.03.022
论文题名: Enhanced upwelling in the eastern equatorial Pacific at the last five glacial terminations
作者: Shaari H.B. ; Yamamoto M. ; Irino T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 386 起始页码: 8
结束页码: 15
语种: 英语
英文关键词: Deglaciation
; Eastern equatorial Pacific
; TEX86
; UK37'
; Upwelling
英文摘要: TEX86H- and UK37'-derived paleotemperatures, and isoprenoid glycerol dialkyl glycerol tetraether (GDGT), and alkenone concentrations were examined for ODP Site 1239 in the eastern equatorial Pacific (EEP) for the last 430kyr. We propose that the difference between TEX86H- and UK37'-derived temperatures ({increment}T) and the abundance ratio of GDGTs to alkenones (GDGT/alkenone ratio) are potential upwelling indices which show consistent results with other upwelling indices. The {increment}T and GDGT/alkenone ratio were maximal during the last five deglaciations, suggesting intensified upwelling. The intensification of upwelling in the EEP coincided with those at the Peru margin and in the Southern Ocean. This coincidence suggests that the reorganization of the Southern Hemisphere atmospheric circulation induced the intensification of the subtropical high-pressure cell, causing stronger southeast trade winds along the west coast of South America and the southern westerlies over the Southern Ocean, enhancing upwelling in both regions. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69654
Appears in Collections: 过去全球变化的重建
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作者单位: Faculty of Environmental Earth Science, Hokkaido University, Kita-10, Nishi-5, Kita-ku, Sapporo 060-0810, Japan
Recommended Citation:
Shaari H.B.,Yamamoto M.,Irino T.. Enhanced upwelling in the eastern equatorial Pacific at the last five glacial terminations[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,386