Timing of Late Quaternary palaeolake evolution in Tengger Desert of northern China and its possible forcing mechanisms
Timing of Late Quaternary palaeolake evolution in Tengger Desert of northern China and its possible forcing mechanisms
复制标题
中国北部腾格里沙漠晚第四纪古湖泊演化时限及其可能的强迫机制
DOI：
10.1016/j.gloplacha.2012.05.014
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发表时间：
2012-07
影响因子：
3.9
通讯作者：
Yu Li
中科院分区：
文献类型：
--
作者：
Hao Long;ZhongPing Lai;Markus Fuchs;Jingran Zhang;Yu Li
利用古湖泊演化史重建了东亚季风区晚第四纪的环境和气候条件。本研究基于OSL年代学（33个样本）和海岸线或湖泊序列地层，重建了东亚夏季风北方边缘腾格里沙漠包围的朱耶则古湖晚第四纪演化历史。结合地貌分析的释光测年结果表明：（1）与以往对MIS 3型特大湖的14 C年代学解释相反，MIS 3型特大湖的高水位约为1000 m。在现代干盐湖之上30 m处有90- 80 ka（MIS 5a）左右的光释光，没有发现MIS 3高水位的证据，这对西北地区“MIS 3晚期特有的暖湿气候格局”提出了质疑。MIS 5a的高日射触发了夏季风的加强，给研究区带来了更多的降水，导致了竹叶则的高水位;现代干盐湖上方20 m处的沉积物出现于8.0-5.0ka（中全新世），表明全新世最湿润的时期发生在中全新世。根据东亚季风边缘区的湖平面重建的水汽场与季风核心区的水汽场存在明显的反位相，这可能与早全新世低海平面导致研究区不受东亚季风影响有关;（3）竹叶泽湖5.0ka以来的萎缩过程表明晚全新世以来的干旱化趋势，直接响应低纬地区夏季太阳辐射触发的东亚季风变化。
Palaeolake evolution history has been used to reconstruct the Late Quaternary environmental and climatic conditions in East Asian monsoon area. In this study, based on the OSL chronology (33 samples) and the stratigraphy of shorelines or lacustrine sequences, we reconstructed the Late Quaternary evolution history of the Zhuyeze palaeolake surrounded by the Tengger Desert at the northern edge of East Asian summer monsoon. The luminescence dating results with geomorphologic analysis indicate that: (1) contrary to previous interpretations on MIS 3 mega-lake derived from14C chronology, highstands of ca. 30m above modern playa are OSL dated to around 90–80ka (MIS 5a), and no evidence of MIS 3 highstands has been found, which questions the previous climate pattern of ‘uniquely warm and wet Late MIS 3’ in northwestern China. The high insolation at MIS 5a triggered the strengthened summer monsoon which brought more rainfall to the study area, causing the highstand in Zhuyeze; (2) a substantial lake with a water level of ca. 20m above the modern playa was present during 8.0–5.0ka (Mid-Holocene), indicating that the wettest stage of the Holocene occurred in the Mid-Holocene. This reconstructed moisture pattern based on lake levels in East Asian monsoon marginal area is out of phase with that in monsoon core area, and we propose that this is possibly related to low sea level during the Early Holocene leading to the study area out of East Asian monsoon influence; (3) the shrinking process of Zhuyeze Lake since 5.0ka indicate the drying trend during the Late Holocene, responding directly to the changes of the East Asian monsoon triggered by summer insolation at low latitude areas.
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影响因子：
3
作者：
Zhongping Lai;H. Brückner
通讯作者：
Zhongping Lai;H. Brückner
柴达木盆地胡尔勒格湖全新世植被与气候历史
影响因子：
1.9
作者：
Ito, Emi;Zhao, Yan;Chen, Fahu;Zhao, Cheng;Yu, Zicheng
通讯作者：
Yu, Zicheng
基于沉积学和发光测年的中国北方半干旱黄旗海全新世演化
影响因子：
2.4
作者：
Zhang, JingRan;Jia, YuLian;Lai, ZhongPing;Long, Hao;Yang, LinHai
通讯作者：
Yang, LinHai
影响因子：
4
作者：
W. Peltier
通讯作者：
W. Peltier
DOI：
10.2307/506799
发表时间：
1998-09
期刊：
--
影响因子：
--
作者：
G. Rapp;M. Aitken
通讯作者：
G. Rapp;M. Aitken