n-Alkane evidence for the onset of wetter conditions in the Sierra Nevada, California (USA) at the mid-late Holocene transition, ~3.0 ka
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Evaluating Holocene climate change in northern Norway using sediment records from two contrasting lake systems
We analyzed Holocene sedimentary records from two lakes in the Lofoten Islands, northern Norway to evaluate environmental changes during the Holocene related to northern North Atlantic climate dynamics. The lakes are located in different geomorphological settings, and thus provide a contrast in their response to regional climate change. Environmental changes at both lakes were interpreted based...
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Mirak (Semnan, Iran) is a Paleolithic site located in a dry floodplain near the northern edge of the Iranian Central Desert. The pedo-sedimentary successions of Mirak 8 are deposited from late Pleistocene to Late Holocene,. The chronological framework was established using optically stimulated luminescence (OSL) dating. The oldest studied units dating back to ~50 ± 3.0 ka. Within this stratigra...
متن کاملThe role of changes in the large-scale atmospheric systems in the evolution of the late Pleistocene and Holocene climate of the Zagros Mountains
1-Introduction The Zagros Mountains range with a northwest-southeast direction covers a large part of western Iran. This range acts as a barrier against mid-latitude westerly airflows and thereby generates significant orographic rainfalls, resulting in a hospitable environment which has been home to ancient civilizations. Major variations in the westerlies can lead to significant environ...
متن کاملProlonged California aridity linked to climate warming and Pacific sea surface temperature
California has experienced a dry 21(st) century capped by severe drought from 2012 through 2015 prompting questions about hydroclimatic sensitivity to anthropogenic climate change and implications for the future. We address these questions using a Holocene lake sediment record of hydrologic change from the Sierra Nevada Mountains coupled with marine sediment records from the Pacific. These data...
متن کاملAn organic geochemical record of Sierra Nevada climate since the LGM from Swamp Lake, Yosemite
Sediment records from Swamp Lake (SL) in the central Sierra Nevada, California, provide evidence of climatic change on millennial and centennial timescales over the lastw20,000 years. Total organic carbon (TOC) abundancevaried in concertwith elemental and isotopic tracers of organicmatter (C/N, dCorg, d15N), biogenic silica content, total magnetic susceptibility, and sediment lithology. We inte...
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تاریخ انتشار 2012