globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.02.027
Scopus记录号: 2-s2.0-85014808179
论文题名:
Wetland evolution in the Qinghai Lake area, China, in response to hydrodynamic and eolian processes during the past 1100 years
作者: Yan D.; Wünnemann B.; Hu Y.; Frenzel P.; Zhang Y.; Chen K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 162
起始页码: 42
结束页码: 59
语种: 英语
英文关键词: Late Holocene ; Little Ice Age (LIA) ; Medieval Warm Period (MWP) ; Ostracoda ; Qinghai Lake ; Solar forcing ; Transport processes ; Wetland evolution
Scopus关键词: Animals ; Atmospheric thermodynamics ; Budget control ; Climate change ; Deposits ; Fluid dynamics ; Glacial geology ; Grain size and shape ; Hydrodynamics ; Ice ; Principal component analysis ; Wetlands ; Late Holocene ; Little Ice Age ; Medieval Warm Period ; Ostracoda ; Qinghai Lake ; Solar forcing ; Transport process ; Lakes ; Ostracoda
英文摘要: The Daotanghe riverine wetland in close proximity to the Qinghai Lake was investigated to demonstrate the interrelationships between Qinghai Lake hydrodynamic processes, eolian mobility and ecological conditions during the past 1100 years in response to climate change. We used ostracod assemblages from various sites east of Qinghai Lake and from the sediment core QW15 of Daotanghe Pond and combined them with grain size and geochemical data from the same core. The statistical extraction of grain size endmembers (EM) revealed three different transportation processes responsible for pond-related fluvio-lacustrine, pure fluvial and eolian deposits. Identified seasonal effects (eolian mobility phase) and timing of ice cover are possible tracers for the competing influence between the Asian summer monsoon and the Westerlies in the Daotanghe Wetland and surrounding area. Our results show that ostracod associations and sediment properties are evidence of a fluvio-lacustrine fresh water environment without ingression of Qinghai Lake into the wetland. Hydrodynamic variations coupled with phases of eolian input indicate highly variable water budgets in response to climate-induced effective moisture supply. The Medieval Warm Period (MWP) until about 1270 CE displays generally moist and warm climate conditions with minor fluctuations, likely in response to variations in summer monsoon intensity. The three-partite period of the Little Ice Age (LIA), shows hydrologically unstable conditions between 1350 and 1530 CE with remarkably colder periods, assigned to a prolonged seasonal ice cover. Pond desiccation and replacement by fluvial deposits occurred between 1530 and 1750 CE, superimposed by eolian deposits. The phase 1730–1900 CE is recorded by the re-occurrence of a pond environment with reduced eolian input. Principal Component Analysis (PCA) on ostracod abundances shows similar trends. All three phases of the LIA developed during a weak summer monsoon influence, favoring westerly-derived climate conditions until ca. 1850 CE, in accordance with records from the adjacent regions. Seasonal freezing periods in excess of the average time of frozen water bodies also occurred in periods of the well-known grand solar minima and indicate stronger seasonality, possibly independent from variations in summer monsoon strength but with links to global northern hemispheric climate. © 2017 Elsevier Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59270
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China; Institute of Geographical Sciences, Freie Universitaet Berlin, Berlin, Germany; Friedrich-Schiller-Universität Jena, Institute of Geosciences, Jena, Germany; Qinghai Province Key Laboratory of Physical Geography and Environmental Process, Qinghai Normal University, China

Recommended Citation:
Yan D.,Wünnemann B.,Hu Y.,et al. Wetland evolution in the Qinghai Lake area, China, in response to hydrodynamic and eolian processes during the past 1100 years[J]. Quaternary Science Reviews,2017-01-01,162
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yan D.]'s Articles
[Wünnemann B.]'s Articles
[Hu Y.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Yan D.]'s Articles
[Wünnemann B.]'s Articles
[Hu Y.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yan D.]‘s Articles
[Wünnemann B.]‘s Articles
[Hu Y.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.