DOI: 10.1016/j.palaeo.2012.08.006
论文题名: Climate signatures on decadal to interdecadal time scales as obtained from mollusk shells (Arctica islandica) from Iceland
作者: Lohmann G. ; Schöne B.R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 373 起始页码: 152
结束页码: 162
语种: 英语
英文关键词: Atmospheric circulation
; Climate proxy
; North Atlantic climate variability
; Proxy data
; Teleconnections
英文摘要: Pronounced decadal climate oscillations are detected in a multi-centennial record based on shell growth rates of the marine bivalve mollusk, Arctica islandica, from Iceland. The corresponding analysis of patterns in sea level pressure and temperature exhibit large-scale teleconnections with North Atlantic climate quantities. We find that the record projects onto blocking situations in the northern North Atlantic. The associated circulation shows a low-pressure signature over Greenland and the Labrador Sea and a high-pressure system over Western Europe associated with northeasterly flow towards Iceland and weakening in the westerly zonal flow over Europe. It can be speculated that such circulation affects food availability controlling shell growth. On multidecadal time scales, the record shows a pronounced variability linked to North Atlantic temperature. In our record, we find enhanced variability of the shell growth rates on multidecadal time scales, and it appears that this oscillation has high amplitudes in the 16th to 18th century also consistent with marine alkenone data. It is conceivable that these climate oscillations, also linked to sea ice export and enhanced blocking, are a more pronounced feature during times when the climate was relatively cold. © 2012. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69828
Appears in Collections: 过去全球变化的重建
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作者单位: Alfred Wegener Institute for Polar and Marine Research, Bussestr. 24, 27570 Bremerhaven, Germany; Institute of Geosciences, Earth System Science Research Center, University of Mainz, Johann-Joachim-Becher-Weg 21, 55128 Mainz, Germany
Recommended Citation:
Lohmann G.,Schöne B.R.. Climate signatures on decadal to interdecadal time scales as obtained from mollusk shells (Arctica islandica) from Iceland[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,373