DOI: 10.1016/j.quascirev.2017.06.019
Scopus记录号: 2-s2.0-85021668835
论文题名: 6-kyr record of flood frequency and intensity in the western Mediterranean Alps – Interplay of solar and temperature forcing
作者: Pierre S. ; Bruno W. ; Francesco F.G. ; Fanny M. ; Jérôme P. ; Anne-Lise D. ; Adeline B. ; Wentao C. ; Cécile P. ; Jean-Louis R. ; Ludovic G. ; Manon B. ; Yves P. ; Emmanuel M. ; Pierre T. ; Fabien A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 170 起始页码: 121
结束页码: 135
语种: 英语
英文关键词: Ancient DNA
; Earthquakes
; Flood frequency and intensity
; Holocene
; Human activity
; Lake sediment
; Paleoclimatology
; Sedimentology
; Western mediterranean alps
Scopus关键词: Analytical geochemistry
; Earthquakes
; Geophysics
; Lakes
; Sedimentology
; Ancient dnas
; Flood frequency
; Holocenes
; Human activities
; Lake sediments
; Paleoclimatology
; Western Mediterranean
; Floods
; air temperature
; climate forcing
; climate variation
; DNA
; earthquake
; flood frequency
; flood wave
; Holocene
; human activity
; lacustrine deposit
; paleoclimate
; paleoflood
; sedimentary sequence
; sedimentology
; solar radiation
; Alps
; Mediterranean Region
英文摘要: The high-resolution sedimentological and geochemical analysis of a sediment sequence from Lake Savine (Western Mediterranean Alps, France) led to the identification of 220 event layers for the last 6000 years. 200 were triggered by flood events and 20 by underwater mass movements possibly related to earthquakes that occurred in 5 clusters of increase seismicity. Because human activity could influence the flood chronicle, the presence of pastures was reconstructed through ancient DNA, which suggested that the flood chronicle was mainly driven by hydroclimate variability. Weather reanalysis of historical floods allow to identify that mesoscale precipitation events called “East Return” events were the main triggers of floods recorded in Lake Savine. The first part of this palaeoflood record (6–4 kyr BP) was characterized by increases in flood frequency and intensity in phase with Northern Alpine palaeoflood records. By contrast, the second part of the record (i.e., since 4 kyr BP) was phased with Southern Alpine palaeoflood records. These results suggest a palaeohydrological transition at approximately 4 kyr BP, as has been previously described for the Mediterranean region. This may have resulted in a change of flood-prone hydro-meteorological processes, i.e., in the balance between occurrence and intensity of local convective climatic phenomena and their influence on Mediterranean mesoscale precipitation events in this part of the Alps. At a centennial timescale, increases in flood frequency and intensity corresponded to periods of solar minima, affecting climate through atmospheric changes in the Euro-Atlantic sector. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59159
Appears in Collections: 过去全球变化的重建
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作者单位: EDYTEM, Université Savoie Mont Blanc, CNRS, Le Bourget du Lac, France; LTHE, Université Grenoble Alpes, Grenoble, France; Laboratoire d'Ecologie Alpine, Université Grenoble Alpes, Grenoble, France; Laboratoire d'Ecologie Alpine, CNRS, Grenoble, France
Recommended Citation:
Pierre S.,Bruno W.,Francesco F.G.,et al. 6-kyr record of flood frequency and intensity in the western Mediterranean Alps – Interplay of solar and temperature forcing[J]. Quaternary Science Reviews,2017-01-01,170