Arid
DOI10.1177/0959683614534741
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years
Lauterbach, Stefan1; Witt, Roman2; Plessen, Birgit1; Dulski, Peter1; Prasad, Sushma1,3; Mingram, Jens1; Gleixner, Gerd2; Hettler-Riedel, Sabine4; Stebich, Martina4; Schnetger, Bernhard5; Schwalb, Antje6; Schwarz, Anja6
通讯作者Lauterbach, Stefan
来源期刊HOLOCENE
ISSN0959-6836
EISSN1477-0911
出版年2014
卷号24期号:8页码:970-984
英文摘要

In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to the progressively weakening influence of the mid-latitude Westerlies on regional climate. However, as the spatio-temporal pattern of this development and the underlying climatic mechanisms are yet not fully understood, new high-resolution paleoclimate records from this region are needed. Within this study, a sediment core from Lake Son Kol (Central Kyrgyzstan) was investigated using sedimentological, (bio) geochemical, isotopic, and palynological analyses, aiming at reconstructing regional climate development during the last 6000 years. Biogeochemical data, mainly reflecting summer moisture conditions, indicate predominantly wet conditions until 4950 cal. yr BP, succeeded by a pronounced dry interval between 4950 and 3900 cal. yr BP. In the following, a return to wet conditions and a subsequent moderate drying trend until present times are observed. This is consistent with other regional paleoclimate records and likely reflects the gradual Late Holocene diminishment of the amount of summer moisture provided by the mid-latitude Westerlies. However, climate impact of the Westerlies was apparently not only restricted to the summer season but also significant during winter as indicated by recurrent episodes of enhanced allochthonous input through snowmelt, occurring before 6000 cal. yr BP and at 5100-4350, 3450-2850, and 1900-1500 cal. yr BP. The distinct similar to 1500year periodicity of these episodes of increased winter precipitation in Central Kyrgyzstan resembles similar cyclicities observed in paleoclimate records around the North Atlantic, likely indicating a hemispheric-scale climatic teleconnection and an impact of North Atlantic Oscillation (NAO) variability in Central Asia.


英文关键词Central Asia climate Holocene lake sediments mid-latitude Westerlies NAO
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000340131800008
WOS关键词CENTRAL-SOUTHWEST ASIA ; LAGUNA-POTROK-AIKE ; TIEN-SHAN ; ATMOSPHERIC CIRCULATION ; ISOTOPIC COMPOSITION ; ORGANIC-MATTER ; N-ALKANES ; ARAL SEA ; RADIOCARBON CALIBRATION ; HOLOCENE PALEOLIMNOLOGY
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/182411
作者单位1.GFZ German Res Ctr Geosci, Sect Climate Dynam & Landscape Evolut 5 2, D-14473 Potsdam, Germany;
2.Max Planck Inst Biogeochem, Res Grp Mol Biogeochem, D-07745 Jena, Germany;
3.Univ Potsdam, Inst Earth & Environm Sci, Potsdam, Germany;
4.Senckenberg Res Inst, Res Stn Quaternary Paleontol, Weimar, Germany;
5.Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm, Oldenburg, Germany;
6.Tech Univ Carolo Wilhelmina Braunschweig, Inst Geosyst & Bioindicat, D-38106 Braunschweig, Germany
推荐引用方式
GB/T 7714
Lauterbach, Stefan,Witt, Roman,Plessen, Birgit,et al. Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years[J],2014,24(8):970-984.
APA Lauterbach, Stefan.,Witt, Roman.,Plessen, Birgit.,Dulski, Peter.,Prasad, Sushma.,...&Schwarz, Anja.(2014).Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years.HOLOCENE,24(8),970-984.
MLA Lauterbach, Stefan,et al."Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years".HOLOCENE 24.8(2014):970-984.
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