globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.02.008
Scopus记录号: 2-s2.0-84896899096
论文题名:
Tracking Holocene glacial and high-altitude alpine environments fluctuations from minerogenic and organic markers in proglacial lake sediments (Lake Blanc Huez, Western French Alps)
作者: Simonneau A.; Chapron E.; Garçon M.; Winiarski T.; Graz Y.; Chauvel C.; Debret M.; Motelica-Heino M.; Desmet M.; Di Giovanni C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 89
起始页码: 27
结束页码: 43
语种: 英语
英文关键词: Ancient mining activities ; Glacial fluctuations ; High-altitude environments ; Holocene ; Northern Westerlies ; Proglacial lake ; Soil erosion ; Western French Alps
Scopus关键词: Ancient minings ; French Alps ; Glacial fluctuations ; High-altitude environments ; Holocenes ; Northern Westerlies ; Proglacial lakes ; Soil erosion ; Catchments ; Climate change ; Erosion ; Glacial geology ; Incident solar radiation ; Lakes ; Soils ; Sediments ; alpine environment ; glacier advance ; Holocene ; insolation ; lacustrine deposit ; lacustrine environment ; Medieval Warm Period ; mining ; paleoclimate ; paleoenvironment ; proglacial environment ; reconstruction ; Roman era ; soil erosion ; westerly ; France ; Isere ; Lake Blanc Huez ; Rhone-Alpes
英文摘要: Holocene palaeoenvironmental evolution and glacial fluctuations at high-altitude in the western French Alps are reconstructed based on a multiproxy approach within Lake Blanc Huez (2550ma.s.l.) drainage basin. The combination of seismic profiling (3.5kHz), piston coring and radiocarbon dating in proglacial lacustrine sediments together with a detailed organic analysis of autochthonous and allochthonous supply allows documenting the evolution of glacier activity during the Holocene. Over the last 9700 years, the Holocene lake record has a bimodal pattern whose transition is progressive and occurring between 5400 and 4700calBP. During the Early Holocene, the organic lacustrine facies reflects reduced glacial activity in the catchment. This major glacial retreat seems to result from solar forcing and high summer insolation. After 5400calBP, lacustrine sedimentation is marked by the gradual increase both of minerogenic supply and soil erosion, suggesting a progressive transition to wetter climatic conditions. This climate change is synchronous both from the gradual decrease of summer insolation and the gradual reorganization of oceanic and atmospheric circulations, characterizing the beginning of the Neoglacial period. Both colder temperature and humid climate induced significant glacier advance, since 4700calBP. Over this global trend, three periods are particularly associated with higher runoff processes and higher soil erosion interpreted as wetter time intervals resulting from enhanced northern Westerlies regimes across the North Atlantic and Western Europe. They are dated from 8700 to 7000, 4700 to 2500 and 1200 to 200calBP. These wetter phases drastically contrast with periods of reduced glacial activities dated from the Early Bronze Age (ca3870-3770calBP), the Iron Age (ca2220-2150calBP), the Roman period (caAD115-330) and the Medieval Warm Period (caAD760-1160). In addition, these dryer periods are associated with mining activities at high-altitude. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60343
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作者单位: Institut des Sciences de la Terre d'Orléans, UMR 7327, CNRS, Univ. Orléans, BRGM, 1A rue de la Férollerie, 45071 Orléans Cedex 2, France; GEODE, UMR 5602 CNRS/Université de Toulouse 2, Allée A. Machado, 31058 Toulouse Cedex, France; ISTerre, Université Joseph Fourier de Grenoble, BP 53, 38041 Grenoble cedex 09, France; LEHNA-IPE UMR 5023, Ecole Nationale des Travaux Public de l'Etat, Université de Lyon, rue Maurice Audin, 69518 Vaulx-en-Velin, France; Université de Lorraine, Institut Jean Lamour, UMR 7198, Vandoeuvre-lès-Nancy F-54506, France; Laboratoire de Morphodynamique Continentale et Côtière, UMR 6143, Université de Rouen, France; GéoHydrosystèmes Continentaux AE CNRS, Université François-Rabelais de Tours, Parc de Grandmont, 37200 Tours, France

Recommended Citation:
Simonneau A.,Chapron E.,Garçon M.,et al. Tracking Holocene glacial and high-altitude alpine environments fluctuations from minerogenic and organic markers in proglacial lake sediments (Lake Blanc Huez, Western French Alps)[J]. Quaternary Science Reviews,2014-01-01,89
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