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引用本文:李育,李卓仑,王乃昂.蒸发和环流因素对湖泊演化的影响——河西走廊猪野泽不同位置全新世沉积物古环境意义探讨.湖泊科学,2012,24(3):474-479. DOI:10.18307/2012.0321
LI Yu,LI Zhuolun,WANG Nai'ang.Impacts of evaporation and circulation on lake evolution:paleoenvironmental implications for Holocene sediments at different locations of Lake Zhuye, Hexi Corridor. J. Lake Sci.2012,24(3):474-479. DOI:10.18307/2012.0321
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蒸发和环流因素对湖泊演化的影响——河西走廊猪野泽不同位置全新世沉积物古环境意义探讨
李育, 李卓仑, 王乃昂
兰州大学资源环境学院, 兰州大学干旱区水循环与水资源研究中心, 兰州 730000
摘要:
湖泊不同位置沉积物重建的古环境变化过程往往具有差异,而这种差异可能揭示了不同的古环境信息.本文以河西走廊石羊河流域终端湖泊猪野泽为例,探讨湖泊不同位置沉积物所代表的古环境意义.位于湖盆边缘的三角城剖面可能反映了石羊河上游地区的降水及其古径流量的变化,这种变化在千年尺度上对应了北大西洋Bond事件,显示该区域通过季风环流系统与全球气候系统的联系.位于湖泊中部的QTH01、QTH02、QTL-03剖面反映了湖泊演化的信息,显示中全新世期间(约7.0-约3.5 cal ka BP)湖泊水位较高的特征,但是这种特征并不能和该流域的古径流相联系,说明该区域湖泊演化除了受千年尺度大气环流特征的影响外,湖泊表面蒸发可能也起了重要作用.该研究为中亚地区普遍存在的中全新世高湖面问题提供了研究思路.
关键词:  全新世  湖泊演化  环流  蒸发  猪野泽  石羊河  河西走廊
DOI:10.18307/2012.0321
分类号:
基金项目:国家自然科学基金项目(41001116);教育部博士研究生学术新人奖项目联合资助
Impacts of evaporation and circulation on lake evolution:paleoenvironmental implications for Holocene sediments at different locations of Lake Zhuye, Hexi Corridor
LI Yu, LI Zhuolun, WANG Nai'ang
Center for Hydrologic Cycle and Water Resources in Arid Region, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, P. R. China
Abstract:
At different locations of a lake basin, sediments always indicate different environmental histories. In this paper, the terminal lake of the Shiyang River, Hexi Corridor, was taken as an example for investigating the palaeoenvironmental significances of lake sediments at different locations. Located on the edge of the lake basin, the Sanjiaocheng section may reflect the paleo-rainfall and paleo-runoff in the upper reaches of the Shiyang River, which corresponded to the millennial-scale Bond Events in the North Atlantic Ocean. The correlation could be caused by the linkage between the Asian monsoon circulation and the North Atlantic Ocean. Located in the middle of the lake basin, the QTH01, QTH02, QTL-03 sections reflect the information relating to the lake evolution, showing relatively high lake level during the mid-Holocene (~7.0-~3.5 cal ka BP); however, the high lake level was not related to the Holocene paleo-runoff change. Therefore, the lake evolution was not only affected by the millennial-scale atmospheric circulation, but also by the lake surface evaporation. The mid-Holocene high lake levels were widely reported in arid Central Asia. This research provided new clues for detecting the climatic mechanisms of the mid-Holocene high lake levels in arid Central Asia.
Key words:  Holocene  lake evolution  circulation  evaporation  Lake Zhuye  Shiyang River  Hexi Corridor
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