DOI: 10.5194/cp-12-299-2016
Scopus记录号: 2-s2.0-84958787499
论文题名: Frequency and intensity of palaeofloods at the interface of Atlantic and Mediterranean climate domains
作者: Wilhelm B. ; Vogel H. ; Crouzet C. ; Etienne D. ; Anselmetti F.S.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 2 起始页码: 299
结束页码: 316
语种: 英语
英文摘要: Mediterranean climatic influences was explored by studying a lake sequence (Lake Foreánt) of the Western European Alps. High-resolution sedimentological and geochemical analysis revealed 171 event layers, 168 of which result from past flood events over the last millennium. The layer thickness was used as a proxy of intensity of past floods. Because the Foreánt palaeoflood record is in agreement with the documented variability of historical floods resulting from local and mesoscale, summer-to-autumn convective events, it is assumed to highlight changes in flood frequency and intensity related to such events typical of both Atlantic (local events) and Mediterranean (mesoscale events) climatic influences. Comparing the Foreánt record with other Atlantic-influenced and Mediterranean-influenced regional flood records highlights a common feature in all flood patterns that is a higher flood frequency during the cold period of the Little Ice Age (LIA, AD 1300-1900). In contrast, high-intensity flood events are apparent during both the cold LIA and the warm Medieval Climate Anomaly (MCA, AD 950-1250). However, there is a tendency towards higher frequencies of high-intensity flood events during the warm MCA. The MCA extremes could mean that under the global warming scenario, we might see an increase in intensity (not in frequency). However, the flood frequency and intensity in the course of the 20th century warming trend did not change significantly. Uncertainties in future evolution of flood intensity lie in the interpretation of the lack of 20th century extremes (transition or stable?) and the different climate forcing factors between the two periods (greenhouse gases vs. solar and/or volcanic eruptions). © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49062
Appears in Collections: 气候变化与战略
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Recommended Citation:
Wilhelm B.,Vogel H.,Crouzet C.,et al. Frequency and intensity of palaeofloods at the interface of Atlantic and Mediterranean climate domains[J]. Climate of the Past,2016-01-01,12(2)