DOI: 10.5194/cp-9-859-2013
Scopus记录号: 2-s2.0-84881132929
论文题名: Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions
作者: Telford R.J. ; Li C. ; Kucera M.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 2 起始页码: 859
结束页码: 870
语种: 英语
Scopus关键词: calibration
; climate modeling
; cooling
; data set
; habitat type
; Last Glacial
; paleoclimate
; planktonic foraminifera
; reconstruction
; sea surface temperature
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: We demonstrate that the temperature signal in the planktonic foraminifera assemblage data from the North Atlantic typically does not originate from near-surface waters and argue that this has the potential to bias sea surface temperature reconstructions using transfer functions calibrated against near-surface temperatures if the thermal structure of the upper few hundred metres of ocean changes over time. CMIP5 climate models indicate that ocean thermal structure in the North Atlantic changed between the Last Glacial Maximum (LGM) and the pre-industrial (PI), with some regions, mainly in the tropics, of the LGM ocean lacking good thermal analogues in the PI. Transfer functions calibrated against different depths reconstruct a marked subsurface cooling in parts of the tropical North Atlantic during the last glacial, in contrast to previous studies that reconstruct only a modest cooling. These possible biases in temperature reconstructions may affect estimates of climate sensitivity based on the difference between LGM and pre-industrial climate. Quantifying these biases has the potential to alter our understanding of LGM climate and improve estimates of climate sensitivity.© 2013 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49438
Appears in Collections: 气候变化与战略
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Recommended Citation:
Telford R.J.,Li C.,Kucera M.. Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions[J]. Climate of the Past,2013-01-01,9(2)