DOI: 10.1016/j.quascirev.2018.05.025
Scopus记录号: 2-s2.0-85048502766
论文题名: Younger Dryas to Early Holocene paleoclimate in Cantabria (N Spain): Constraints from speleothem Mg, annual fluorescence banding and stable isotope records
作者: Rossi C. ; Bajo P. ; Lozano R.P. ; Hellstrom J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 192 起始页码: 71
结束页码: 85
语种: 英语
英文关键词: Annual fluorescence lamination
; Early holocene
; Magnesium concentration
; Northern Spain
; Speleothems
; Stable isotopes
; Younger dryas
Scopus关键词: Binary alloys
; Calcite
; Earth (planet)
; Fluorescence
; Glacial geology
; Growth rate
; Isotopes
; Laminating
; Thorium alloys
; Annual fluorescence lamination
; Early Holocene
; Magnesium concentrations
; Northern Spain
; Speleothems
; Stable isotopes
; Younger Dryas
; Climate change
英文摘要: The Younger Dryas (YD) stadial represents the most abrupt climate change of the Earth's recent history. Thus, understanding its causes and different local responses is relevant for Quaternary paleoclimatology. We present a speleothem high-resolution proxy record of the Lateglacial to Early Holocene paleoclimate of the Cantabrian Cordillera (N Spain), a strategic location to evaluate the influence of North Atlantic events such as the YD on South-Western Europe. Fluorescence lamination, growth-rate, stable-isotope, and [Mg] records from stalagmite SIR-1 were dated using an age-depth model constrained by U-Th dates and annual-lamina counting. The YD is recorded as a prominent positive δ13C excursion whose chronology (12.95 ± 0.14 to 11.62 ± 0.16 ka) and shape closely agree with the GS-1 stadial as defined in Greenland ice, supporting the event synchronicity in both areas. A colder and drier YD climate limited soil productivity and dripwater availability, leading to higher δ13C and [Mg], reduced growth rate, and virtually absent fluorescence lamination. The early YD record (until ∼12.5 ka) reflects increasing aridity, whereas the late YD (from ∼12.2 ka on) shows the opposite trend. At the YD boundaries, temperature changes influenced the [Mg] record by modifying the Mg partition into calcite. However, this effect was superseded by major changes in dripwater Mg/Ca linked to rainfall variations. During the Early Holocene, the Arnero Sierra was forested and had a relatively warm and humid seasonal climate, indicated in SIR-1 by higher growth rates, lower δ13C and [Mg], and well-developed fluorescent lamination. Similar to other high-resolution stalagmitic records of the Cordillera, from ∼8.5 to 8.0 ka SIR-1 reflects a temporary trend of increasing aridity. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112132
Appears in Collections: 气候减缓与适应
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作者单位: Dept. Petrología y Geoquímica, Facultad de Ciencias Geológicas, Universidad Complutense, Madrid, 28040, Spain; School of Earth Sciences, The University of Melbourne, Victoria, 3010, Australia; School of Geography, The University of Melbourne, Victoria, 3010, Australia; Museo Geominero, Instituto Geológico y Minero de España, Ríos Rosas 23, Madrid, 28003, Spain
Recommended Citation:
Rossi C.,Bajo P.,Lozano R.P.,et al. Younger Dryas to Early Holocene paleoclimate in Cantabria (N Spain): Constraints from speleothem Mg, annual fluorescence banding and stable isotope records[J]. Quaternary Science Reviews,2018-01-01,192