Long, continuous, marine sediment records from the subpolar North Atlantic document the glacial modulation of regional climate instability throughout the past 0.5 million years. Whenever ice sheet size surpasses a critical threshold indicated by the…
Papers in Sedimentology
Sedimentology papers in Earth Sciences, A
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We present a sea-ice record from northern Greenland covering the past 10,000 years. Multiyear sea ice reached a minimum between ~8500 and 6000 years ago, when the limit of year-round sea ice at the coast of Greenland was located ~1000 kilometers to…
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1 Air mass trajectories in the Southern Hemisphere provide a mechanism for transport to and deposition of volcanic products on the Antarctic ice sheet from local volcanoes and from tropical and subtropical volcanic centers. This study extends the…
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Major ion series developed from new subannual scale sampling of an ice core from central Greenland are calibrated with instrumental series of atmospheric sea-level pressure recording major marine (Icelandic Low) and terrestrial (Siberian High)…
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Aeolian deposits in the Wahiba Sands, Sultanate of Oman, reveal patterns of atmospheric circulation over the past 160,000 years. Luminescence dating indicates a correlation of dune activity with periods of low global sea level and decreased monsoon…
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This paper introduces the background and main results of a research project aimed at unravelling the paleolimnological and paleoclimatological history of Lago Puyehue (40 degrees S, Lake District, Chile) since the Last Glacial Maximum (LGM), based…
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Marker horizons of brick dust were established in 1986 in 26 salt marshes along the coast of Maine (USA). In 2003 we measured the sediment accumulation rates for the 17 year period in 11 relocated sites and obtained results varying from 1.4 to 4.2…
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We inferred wind-strength variations at the Namibian coast and its effect on upwelling intensity over the last 190 ky, by comparing grain-size data and alkenone-based sea surface temperatures (SSTs) from one sediment core located on the upper slope…
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A high-resolution study was performed on varved sediments from Lake Lehmilampi in eastern Finland. Varve data was collected by digital image analysis using standard 1.8 mm thick samples impregnated in epoxy and X-rayed. Climatic variability is…
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The reconstruction of geomagnetic field intensity variations during the last 200 kyr from paleomagnetic data is at present the subject of numerous studies and major debate. There is currently no generally accepted record. The authors present a…
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Marine deposits at +20 3 m on the tectonically stable coastlines of Bermuda and the Bahamas support the hypothesis of a partial collapse of the Antarctic ice sheet during the middle Pleistocene. Beach sediments fill a sea cave at +22 m in Bermuda,…
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Fossil rodent middens and wetland deposits from the central Atacama Desert (22 degrees to 24 degrees S) indicate increasing summer precipitation, grass cover, and groundwater levels from 16.2 to 10.5 calendar kiloyears before present(ky B.P.).…
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Late-Holocene vegetational disturbance by human and volcanic activity in the lower montane rain forest region of Cordillera de Talamanca, Province of Chiriqui in Panama, have been studied on the sedimentary archive from Laguna Volca AMS dates,…
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The study of rivers as ecosystems has many fields of research, like the resolution and compre- hension of flow and sediment transport phenomena. In this communication a 2D numerical model using the Finite Volume Method is presented, throughout a…
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High-resolution physical analyses (varve thickness and relative X-ray density) were conducted on a 3000-year varved sediment sequence in Lake Korttajarvi, central Finland. Climate and the local environment strongly influence the properties of the…
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The terrigenous fraction of sediments recovered from Walvis Ridge, SE Atlantic Ocean, reveals a history of southwestern African climate of the last 300 kyr. End-member modelling of a data set of grain-size distributions (n=428) results in three end…
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To understand better the link between atmospheric CO2 concentrations and climate over geological time, records of past CO2 are reconstructed from geochemical proxies. Although these records have provided us with a broad picture of CO2 variation…
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A continuous record of lacustrine sedimentation capturing the entire full-glacial period was obtained from Arolik Lake in the Ahklun Mountains, southwestern Alaska. Fluctuations in magnetic susceptibility (MS), grain size, organic-matter (OM)…
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A 33 Ma lithostratigraphic record of tectonic and paleoceanographic evolution of the South China SeaThe 853m thick sediment sequence recovered at ODP Site 1148 provides an unprecedented record of tectonic and paleoceanographic evolution in the South China Sea over the past 33Ma. Litho-, bio-, and chemo-stratigraphic studies helped identify six…
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