兰州大学机构库 >资源环境学院
Open Access Quantitative reconstruction of precipitation changes on the NE Tibetan Plateau since the Last Glacial Maximum - extending the concept of pollen source area to pollen-based climate reconstructions from large lakes
Wang, Y.1,2; Herzschuh, U.1,2; Shumilovskikh, L. S.3; Mischke, S.2,4; Birks, H. J. B.5,6,7,8; Wischnewski, J.1,2; Boehner, J.9; Schluetz, F.3,10; Lehmkuhl, F.11; Diekmann, B.1; Wuennemann, B.12; Zhang, C.13
2014
Source PublicationClimate of the Past   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN1814-9324
Volume10Issue:1Pages:21-39
AbstractPollen records from large lakes have been used for quantitative palaeoclimate reconstruction, but the influences that lake size (as a result of species-specific variations in pollen dispersal patterns that smaller pollen grains are more easily transported to lake centre) and taphonomy have on these climatic signals have not previously been systematically investigated. We introduce the concept of pollen source area to pollen-based climate calibration using the north-eastern Tibetan Plateau as our study area. We present a pollen data set collected from large lakes in the arid to semi-arid region of central Asia. The influences that lake size and the inferred pollen source areas have on pollen compositions have been investigated through comparisons with pollen assemblages in neighbouring lakes of various sizes. Modern pollen samples collected from different parts of Lake Donggi Cona (in the north-eastern part of the Tibetan Plateau) reveal variations in pollen assemblages within this large lake, which are interpreted in terms of the species-specific dispersal and depositional patterns for different types of pollen, and in terms of fluvial input components. We have estimated the pollen source area for each lake individually and used this information to infer modern climate data with which to then develop a modern calibration data set, using both the multivariate regression tree (MRT) and weighted-averaging partial least squares (WA-PLS) approaches. Fossil pollen data from Lake Donggi Cona have been used to reconstruct the climate history of the north-eastern part of the Tibetan Plateau since the Last Glacial Maximum (LGM). The meanannual precipitation was quantitatively reconstructed using WA-PLS: extremely dry conditions are found to have dominated the LGM, with annual precipitation of around 100 mm, which is only 32% of present-day precipitation. A gradually increasing trend in moisture conditions during the Late Glacial is terminated by an abrupt reversion to a dry phase that lasts for about 1000 yr and coincides with "Heinrich event 1" in the North Atlantic region. Subsequent periods corresponding to the Bolling/Allerod interstadial, with annual precipitation (P-ann) of about 350 mm, and the Younger Dryas event (about 270 mm P-ann) are followed by moist conditions in the early Holocene, with annual precipitation of up to 400 mm. A drier trend after 9 cal. ka BP is followed by a second wet phase in the middle Holocene, lasting until 4.5 cal. ka BP. Relatively steady conditions with only slight fluctuations then dominate the late Holocene, resulting in the present climatic conditions. The climate changes since the LGM have been primarily driven by deglaciation and fluctuations in the intensity of the Asian summer monsoon that resulted from changes in the Northern Hemisphere summer solar insolation, as well as from changes in the North Atlantic climate through variations in the circulation patterns and intensity of the westerlies.
Subject AreaGeology ; Meteorology & Atmospheric Sciences
PublisherCOPERNICUS GESELLSCHAFT MBH
DOI10.5194/cp-10-21-2014
Publication PlaceGOTTINGEN
Indexed BySCIE
Language英语
First Inst
Funding Project国家留学基金委项目 ; 德国科学基金会项目
Project NumberHelmholtz - China Scholarship Council (CSC) Young Scientist Fellowship [2008491101] ; German Research Foundation (Deutsche Forschungsgemeinschaft, DFG)
WOS IDWOS:000333837600002
Funding OrganizationCSC ; DFG
SubtypeArticle
Department
[Wang, Y.;
Herzschuh, U.;
Wischnewski, J.;
Diekmann, B.] Alfred Wegener Inst Polar & Marine Res, Res Unit Potsdam, D-14473 Potsdam, Germany;
[Wang, Y.;
Herzschuh, U.;
Mischke, S.;
Wischnewski, J.] Univ Potsdam, Inst Earth & Environm Sci, D-14476 Potsdam, Germany;
[Shumilovskikh, L. S.;
Schluetz, F.] Univ Gottingen, Dept Palynol & Climate Dynam, Albrecht von Haller Inst Plant Sci, D-37073 Gottingen, Germany...更多
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/120411
Collection资源环境学院
Corresponding AuthorWang, Y.
Affiliation
1.Alfred Wegener Inst Polar & Marine Res, Res Unit Potsdam, D-14473 Potsdam, Germany
2.Univ Potsdam, Inst Earth & Environm Sci, D-14476 Potsdam, Germany
3.Univ Gottingen, Dept Palynol & Climate Dynam, Albrecht von Haller Inst Plant Sci, D-37073 Gottingen, Germany
4.Free Univ Berlin, Inst Geol Sci, D-12249 Berlin, Germany
5.Univ Bergen, Dept Biol, N-5006 Bergen, Norway
6.Bjerknes Ctr Climate Res, N-5007 Bergen, Norway
7.UCL, Environm Change Res Ctr, London WC1E 6BT, England
8.Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY, England
9.Univ Hamburg, Inst Geog, D-20145 Hamburg, Germany
10.Free Univ Berlin, Inst Geog Sci, D-12249 Berlin, Germany
11.Rhein Westfal TH Aachen, Dept Geog, D-52056 Aachen, Germany
12.Nanjing Univ, Sch Geog & Oceanog, Nanjing 210093, Jiangsu, Peoples R China
13.Lanzhou Univ, Sch Resources & Environm Sci, Ctr Arid Environm & Paleoclimate Res, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y.,Herzschuh, U.,Shumilovskikh, L. S.,et al. Open Access Quantitative reconstruction of precipitation changes on the NE Tibetan Plateau since the Last Glacial Maximum - extending the concept of pollen source area to pollen-based climate reconstructions from large lakes[J]. Climate of the Past,2014,10(1):21-39.
APA Wang, Y..,Herzschuh, U..,Shumilovskikh, L. S..,Mischke, S..,Birks, H. J. B..,...&Zhang, C..(2014).Open Access Quantitative reconstruction of precipitation changes on the NE Tibetan Plateau since the Last Glacial Maximum - extending the concept of pollen source area to pollen-based climate reconstructions from large lakes.Climate of the Past,10(1),21-39.
MLA Wang, Y.,et al."Open Access Quantitative reconstruction of precipitation changes on the NE Tibetan Plateau since the Last Glacial Maximum - extending the concept of pollen source area to pollen-based climate reconstructions from large lakes".Climate of the Past 10.1(2014):21-39.
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