DOI: 10.1016/j.quascirev.2013.08.018
Scopus记录号: 2-s2.0-84884784900
论文题名: Mid- to late Holocene flood frequency changes in the northeastern Alps as recorded in varved sediments of Lake Mondsee (Upper Austria)
作者: Swierczynski T. ; Lauterbach S. ; Dulski P. ; Delgado J. ; Merz B. ; Brauer A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 80 起始页码: 78
结束页码: 90
语种: 英语
英文关键词: μXRF
; Detrital layers
; Flood frequency
; Microfacies
; Palaeofloods
; Varved lake sediments
Scopus关键词: Detrital layers
; Flood frequency
; Lake sediments
; Micro-facies
; Palaeofloods
; Debris
; Lakes
; Runoff
; Sediments
; Floods
; atmospheric circulation
; Bronze Age
; debris flow
; erosion
; flood
; flood frequency
; Holocene
; Iron Age
; lacustrine deposit
; Little Ice Age
; Medieval Warm Period
; microfacies
; Neolithic
; rainfall
; runoff
; summer
; Alps
; Atlantic Ocean
; Austria
; Europe
; Mondsee [Salzburg]
; Salzburg [Austria]
英文摘要: Annually laminated (varved) lake sediments with intercalated detrital layers resulting from sedimentary input by runoff events are ideal archives to establish precisely dated records of past extreme runoff events. In this study, the mid- to late Holocene varved sediments of Lake Mondsee (Upper Austria) were analysed by combining sedimentological, geophysical and geochemical methods. This approach allows to distinguish two types of detrital layers related to different types of extreme runoff events (floods and debris flows) and to detect changes in flood activity during the last 7100 years. In total, 271 flood and 47 debris flow layers, deposited during spring and summer, were identified, which cluster in 18 main flood episodes (FE 1-18) with durations of 30-50 years each. These main flood periods occurred during the Neolithic (7100-7050vyrBP and 6470-4450vyrBP), the late Bronze Age and the early Iron Age (3300-3250 and 2800-2750 vyr BP), the late Iron Age (2050-2000vyrBP), throughout the Dark AgesCold Period (1500-1200vyrBP), and at the end of the Medieval Warm Period and the Little Ice Age (810-430vyrBP).Summer flood episodes in Lake Mondsee are generally more abundant during the last 1500 years, often coinciding with major advances of Alpine glaciers. Prior to 1500vyrBP, spring/summer floods and debris flows are generally less frequent, indicating a lower number of intense rainfall events that triggered erosion. In comparison with the increase of late Holocene flood activity in western and northwestern (NW) Europe, commencing already as early as 2800yr BP, the hydro-meteorological shift in the Lake Mondsee region occurred much later. These time lags in the onset of increased hydrological activity might be either due to regional differences in atmospheric circulation pattern or to the sensitivity of the individual flood archives. The Lake Mondsee sediments represent the first precisely dated and several millennia long summer flood record for the northeastern (NE) Alps, a key region at the climatic boundary of Atlantic, Mediterranean and East European air masses, aiding a better understanding of regional and seasonal peculiarities of flood occurrence under changing climate conditions. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60460
Appears in Collections: 过去全球变化的重建
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作者单位: GFZ German Research Centre for Geosciences, Section 5.2 - Climate Dynamics and Landscape Evolution, Telegrafenberg, 14473 Potsdam, Germany; GFZ German Research Centre for Geosciences, Section 5.4 - Hydrology, Telegrafenberg, 14473 Potsdam, Germany; University of Potsdam, Institute of Earth and Environmental Sciences, 14476 Potsdam, Germany
Recommended Citation:
Swierczynski T.,Lauterbach S.,Dulski P.,et al. Mid- to late Holocene flood frequency changes in the northeastern Alps as recorded in varved sediments of Lake Mondsee (Upper Austria)[J]. Quaternary Science Reviews,2013-01-01,80