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Registros recuperados: 5
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Changes in magnetic susceptibility and grain size of Holocene sediments of the Pearl River estuary and climate changes reflected by them. OceanDocs
Cao, Linglong; Wang, Ping; Wang, Jianhua; Wang, Xiaojing; Yang, Jie.
Through the Pearl River Estuary Wan Qing-sha W2 core AMS 14C dating of sediments, combining with paleomagnetic test, pollen analysis, and comprehensive comparison with other relevant records, the regional framework of Holocene age was established. Using the combined feature grain size and magnetic susceptibility proxies for the environment, climate change information in the area since about 6 000 cal yr BP was obtained. The result showed the area since the middle Holocene had experienced three stages climate changes of warm and dry - cool and wet temperature and humidity. South area of China in the late Holocene climate (especially rainfall) had important changes, corresponding to the Northern Hemisphere solar radiation reducing, air temperature...
Tipo: Journal Contribution Palavras-chave: Grain size; Magnetic susceptibility; Holocene; Palaeoclimate.
Ano: 2012 URL: http://hdl.handle.net/1834/5851
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Lateglacial to Holocene climatic and environmental changes in Europe – multi-proxy studies on lake sediments along a transect from northern Italy to northeastern Poland ArchiMer
Lauterbach, Stefan.
Sediment records of three European lakes were investigated in order to reconstruct the regional climate development during the Lateglacial and Holocene, to investigate the response of local ecosystems to climatic fluctuations and human impact and to relate regional peculiarities of past climate development to climatic changes on a larger spatial scale. The Lake Hańcza (NE Poland) sediment record was studied with a focus on reconstructing the early Holocene climate development and identifying possible differences to Western Europe. Following the initial Holocene climatic improvement, a further climatic improvement occurred between 10 000 and 9000 cal. a BP. Apparently, relatively cold and dry climate conditions persisted in NE Poland during the first ca....
Tipo: Text Palavras-chave: Europe; Holocene; Lateglacial; Lake sediments; Palaeoclimate.
Ano: 2011 URL: https://archimer.ifremer.fr/doc/00505/61624/65536.pdf
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Miocene to Pleistocene clay mineral sedimentation on the New Jersey shelf ArchiMer
Vanderaveroet, P.
The clay fraction of sediments drilled at Ocean Drilling Program (ODP) sites 1071 and 1072 is composed of variable proportions of chlorite, illite, smectite. kaolinite, vermiculite and mixed-layers such as illite/vermiculite (I/V) and chlorite/vermiculite (C/V). Miocene and Pliocene climates allowed formation of vermiculite and kaolinite. Pleistocene clay sedimentation was characterized by abundant chlorite and illite resulting from increasing erosion of the crystalline rocks outcropping in northern areas (e.g. Canadian Shield) developed under glacial climate. The clay minerals identified on the shelf are relatively similar to those deposited on the New Jersey continental slope and rise, and a similar trend in the composition of clay assemblages is...
Tipo: Text Palavras-chave: Plate-forme; New Jersey; Minéraux argileux; Néogène; Paléoclimat; Shelf; New Jersey; Clay minerals; Neogene; Palaeoclimate.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00325/43575/44043.pdf
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Premières observations sur la morphologie et les processus sédimentaires récents de l'Éventail celtique ArchiMer
Auffret, Gérard-andré; Zaragosi, S; Voisset, Michel; Droz, Laurence; Loubrieu, Benoit; Pelleau, Pascal; Savoye, R; Bourillet, Jean-francois; Baltzer, Agness; Bourquin, S; Dennielou, Bernard; Coutelle, Alain; Weber, N; Floch, Gilbert.
During the SEDIFAN 1 cruise we surveyed the bathymetry and the acoustic properties of the surface sediment of the Celtic Deep Sea Fan. We also collected Kullenberg cores in order to study recent sedimentary processes. From the bathymetry survey it is relatively easy to recognize the main areas of modern fan. The upper fan included a large sedimentary ridge which constitutes the right levee of the prominent meandering Whittard valley. After its confluence with the Shamrock valley the course of the Whittard valley is abruptly deflected to the south. At a short distance to the south the valley divides into two upper-fan channels, the Celtic channel to the west being the deeper one. This point constitutes the centre of a radiating pattern which is developed on...
Tipo: Text Palavras-chave: Paléoclimat; Turbidité; Sédiment; Quaternaire; Eventail profond; Palaeoclimate; Turbidity; Sediment; Quaternary; Deep sea fan.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-525.pdf
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The co-evolution of Black Sea level and composition through the last deglaciation and its paleoclimatic significance ArchiMer
Major, Candace O.; Goldstein, Steven L.; Ryan, William B.f.; Lericolais, Gilles; Piotrowski, Alexander M.; Hajdas, Irka.
The Black Sea was an inland lake during the last ice age and its sediments are an excellent potential source of information on Eurasian climate change, showing linkages between regionally and globally recognized millennial-scale climate events of the last deglaciation. Here, we detail changes from the last glacial maximum (LGM) through the transition to an anoxic marginal sea using isotopic (strontium and oxygen) and trace element (Sr/Ca) ratios in carbonate shells, which record changing input sources and hydrologic conditions in the basin and surrounding region. Sr isotope records show two prominent peaks between similar to 18 and 16 ka BP cal, reflecting anomalous sedimentation associated with meltwater from disintegrating Eurasian ice sheets that...
Tipo: Text Palavras-chave: Sea level changes; Black Sea; Deglaciation; Glaciation; Palaeoclimate; Palaeoceanography.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2006.pdf
Registros recuperados: 5
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