DOI: 10.5194/cp-12-1539-2016
Scopus记录号: 2-s2.0-84978658355
论文题名: Holocene hydrological changes in the Rhône River (NW Mediterranean) as recorded in the marine mud belt
作者: Bassetti M.-A. ; Berné S. ; Sicre M.A. ; Dennielou B. ; Alonso Y. ; Buscail R. ; Jalali B. ; Hebert B. ; Menniti C.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 7 起始页码: 1539
结束页码: 1553
语种: 英语
Scopus关键词: accumulation rate
; catchment
; data set
; Holocene
; hydrological change
; land-sea interaction
; Little Ice Age
; marine sediment
; Medieval Warm Period
; mudflat
; proxy climate record
; sediment core
; sediment trap
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf of Lion
; Mediterranean Sea
; Mediterranean Sea (Northwest)
; Rhone River
英文摘要: Expanded marine Holocene archives are relatively scarce in the Mediterranean Sea because most of the sediments were trapped in catchment areas during this period. Mud belts are the most suitable targets to access expanded Holocene records. These sedimentary bodies represent excellent archives for the study of sea-land interactions and notably the impact of the hydrological activity on sediment accumulation. We retrieved a 7.2 m long sediment core from the Rhône mud belt in the Gulf of Lions in an area where the average accumulation rate is ca. 0.70 m 1000 y-1. This core thus provides a continuous and high-resolution record of the last 10 ka cal BP. A multiproxy dataset (XRF core scan, 14C dates, grain size and organic-matter analysis) combined with seismic stratigraphic analysis was used to document decadal to centennial changes in the Rhône hydrological activity. Our results show that (1) the early Holocene was characterized by high sediment delivery likely indicative of local intense (but short-duration) rainfall events, (2) important sediment delivery around 7 ka cal BP presumably related to increased river flux, (3) a progressive increase in continental/marine input during the mid-Holocene despite increased distance from river outlets due to sea-level rise possibly related to higher atmospheric humidity caused by the southward migration of the storm tracks in the North Atlantic, (4) multidecadal to centennial humid events took place in the late Holocene. Some of these events correspond to the cold periods identified in the North Atlantic (Little Ice Age, LIA; Dark Ages Cold Period) and also coincide with time intervals of major floods in the northern Alps. Other humid events are also observed during relatively warm periods (Roman Humid Period and Medieval Climate Anomaly). © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48991
Appears in Collections: 气候变化与战略
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Recommended Citation:
Bassetti M.-A.,Berné S.,Sicre M.A.,et al. Holocene hydrological changes in the Rhône River (NW Mediterranean) as recorded in the marine mud belt[J]. Climate of the Past,2016-01-01,12(7)