DOI: 10.5194/cp-12-1389-2016
Scopus记录号: 2-s2.0-84976907999
论文题名: Extreme storms during the last 6500 years from lagoonal sedimentary archives in the Mar Menor (SE Spain)
作者: Dezileau L. ; Pérez-Ruzafa A. ; Blanchemanche P. ; Degeai J.-P. ; Raji O. ; Martinez P. ; Marcos C. ; Von Grafenstein U.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 6 起始页码: 1389
结束页码: 1400
语种: 英语
Scopus关键词: coastal zone
; core analysis
; extreme event
; ice-rafted debris
; image resolution
; lagoonal sedimentation
; paleoclimate
; periodicity
; radiocarbon dating
; storm
; thermohaline circulation
; tsunami
; Atlantic Ocean
; Mar Menor
; Murcia [Spain]
; North Atlantic Current
; Spain
英文摘要: Storms and tsunamis, which may seriously endanger human society, are amongst the most devastating marine catastrophes that can occur in coastal areas. Many such events are known and have been reported for the Mediterranean, a region where high-frequency occurrences of these extreme events coincides with some of the most densely populated coastal areas in the world. In a sediment core from the Mar Menor (SE Spain), we discovered eight coarse-grained layers which document marine incursions during periods of intense storm activity or tsunami events. Based on radiocarbon dating, these extreme events occurred around 5250, 4000, 3600, 3010, 2300, 1350, 650, and 80 years calBP. No comparable events have been observed during the 20th and 21st centuries. The results indicate little likelihood of a tsunami origin for these coarse-grained layers, although historical tsunami events are recorded in this region. These periods of surge events seem to coincide with the coldest periods in Europe during the late Holocene, suggesting a control by a climatic mechanism for periods of increased storm activity. Spectral analyses performed on the sand percentage revealed four major periodicities of 1228±327, 732±80, 562±58, and 319±16 years. Amongst the well-known proxies that have revealed a millennial-scale climate variability during the Holocene, the ice-rafted debris (IRD) indices in the North Atlantic developed by Bond et al. (1997, 2001) present a cyclicity of 1470±500 years, which matches the 1228±327-year periodicity evidenced in the Mar Menor, considering the respective uncertainties in the periodicities. Thus, an in-phase storm activity in the western Mediterranean is found with the coldest periods in Europe and with the North Atlantic thermohaline circulation. However, further investigations, such as additional coring and high-resolution coastal imagery, are needed to better constrain the main cause of these multiple events. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49001
Appears in Collections: 气候变化与战略
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Recommended Citation:
Dezileau L.,Pérez-Ruzafa A.,Blanchemanche P.,et al. Extreme storms during the last 6500 years from lagoonal sedimentary archives in the Mar Menor (SE Spain)[J]. Climate of the Past,2016-01-01,12(6)