Holocene

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Fire ecology north and south of the Alps since the last ice age
Holocene - Tập 15 Số 8 - Trang 1214-1226 - 2005
Willy Tinner, Marco Conedera, Brigitta Ammann, André F. Lotter
Wildfires are very rare in central Europe, which is probably why fire effects on vegetation have been neglected by most central European ecologists and palaeoecologists. Presently, reconstructions of fire history and fire ecology are almost absent. We analysed sediment cores from lakes on the Swiss Plateau (Lobsigensee and Soppensee) for pollen and charcoal to investigate the relationship between ... hiện toàn bộ
Holocene environmental changes in Namibia inferred from pollen analysis of swamp and lake deposits
Holocene - Tập 1 Số 1 - Trang 8-13 - 1991
Louis Scott, Brigitte Cooremans, J.S. de Wet, J. C. Vogel
Spring deposits exposed during building operations in downtown Windhoek, and lake sediments retrieved from underneath 50 m of water in a sinkhole (Lake Otjikoto), contain pollen profiles which reflect environmental changes in Namibia during the Holocene. At Windhoek moist local conditions are reflected by pollen in the spring deposits which were radiocarbon-dated to between ca. 7000 and 6000 BP. T... hiện toàn bộ
A chronostratigraphy of mid and late-Holocene slope evolution: Creagan a' Chaorainn, Northern Highlands, Scotland
Holocene - Tập 16 Số 3 - Trang 429-444 - 2006
Eleanor Mary Reid, Michael F. Thomas
Unusual exposure of the drift stratigraphy of a typical, vegetated hillslope in the Northern Highlands of Scotland has allowed reconstruction of its Holocene history. Graphic logging of palaeogully fill, sediment analysis, radiocarbon dating and microscopic investigation of horizon boundaries, link periodic slope instability to changes in hydrology and vegetation cover. The oldest preserved organi... hiện toàn bộ
Radiocarbon chronology andδ13C analysis of mid-to late-Holocene aeolian environments, Guadalupe Mountains National Park, Texas, USA
Holocene - Tập 9 Số 3 - Trang 363-371 - 1999
David E. Wilkins, Donald R. Currey
The Red Dunes of Guadalupe Mountains National Park are quartzose sand sheets and dunes stabilized by sparse plant cover. Stratigraphy, radiocarbon dating, and δ13C analysis were examined in two of the larger arroyos for correlating evidence of aeolian deposition, which in this basin is taken as an indication of arid conditions. Four quartz-sand lithostratigraphic units, representing intervals of a... hiện toàn bộ
Holocene evolution of Huangqihai Lake in semi-arid northern China based on sedimentology and luminescence dating
Holocene - Tập 21 Số 8 - Trang 1261-1268 - 2011
Jingran Zhang, Yulian Jia, Zhongping Lai, Hao Long, Linhai Yang
The pattern of Holocene palaeoclimatic change in arid-semiarid northern China is debated. The terminal Huangqihai Lake is located at the northern margin of the modern East Asian summer monsoon and sensitive to climate change. We present here a sedimentary section from Huangqihai lake basin which comprises lacustrine and fluvial deposits and is about 8–9 m above the present lake level. Quartz optic... hiện toàn bộ
Holocene climate changes in the monsoon/arid transition reflected by carbon concentration in Daihai Lake of Inner Mongolia
Holocene - Tập 16 Số 4 - Trang 551-560 - 2006
Jinchong Xiao, Jintao Wu, Bin Si, Wendong Liang, Toshio Nakamura, Baolin Liu, Yoshio Inouchi
Two sediment cores recovered in the central part of Daihai Lake in north-central China were analysed at 2-to 4-cm intervals for total inorganic and organic carbon (TIC and TOC) concentrations. The TIC concentration is inferred to reflect temperatures over the lake region and an increase in the TIC concentration implies an increase in the temperature. TOC concentration is considered to reflect the ... hiện toàn bộ
Optical dating of Holocene dune sands from the Hulun Buir Desert, northeastern China
Holocene - Tập 16 Số 3 - Trang 457-462 - 2006
Shenghua Li, Jimin Sun
Aeolian deposits from the Hulun Buir Desert of northeastern China are studied with optically stimulated luminescence dating methods to establish the chronology of dune building phases and climatic changes since the last deglaciation. Our results indicate that wet climate, marked by dune stabilization and soil development in the Hulun Buir Desert, commenced at-11 ka ago, and this early episode of d... hiện toàn bộ
Locating the boundary between the Pleistocene and the Holocene in Chinese loess using luminescence
Holocene - Tập 16 Số 6 - Trang 893-899 - 2006
Zhongping Lai, A.G. Wintle
Interpreting stable-isotope records from freshwater snail-shell carbonate: a Holocene case study from Lake Gölhisar, Turkey
Holocene - Tập 12 Số 5 - Trang 629-634 - 2002
Matthew D. Jones, Melanie J. Leng, Warren J. Eastwood, D. H. Keen, Chris Turney
The oxygen and carbon stable-isotope ratios from fossil snail shells within a small intramontane lake in southwest Turkey are used to highlight the potential, and problems, of using freshwater snail carbonate as a palaeoenvironmental proxy. Two species (Gyraulus piscinarum and Valvata cristata) yielded different isotope ratios at the same sampling intervals, probably due to differences in water-is... hiện toàn bộ
Pollen evidence from tropical Australia for the onset of an ENSO-dominated climate at c. 4000 BP
Holocene - Tập 5 Số 1 - Trang 10-18 - 1995
James Shulmeister, Jeffery A. Thompson
The Holocene climatic history of tropical northern Australia is re-examined using the recently published pollen record from Groote Eylandt to corroborate and refine previous climatic inter pretations. We identify a four-stage Holocene comprising: (1) a continuous increase in effective precipitation (EP) from the beginning of the Holocene to about 5000 BP; (2) a mid-Holocene EP maximum from about 5... hiện toàn bộ
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