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引用本文:王乃昂,李吉均,穆得芬,高顺尉.河西走廊东段湖泊旋回及其古气候意义.湖泊科学,1999,11(3):225-230. DOI:10.18307/1999.0306
WANG Nai-ang,LI Ji-jun,MU De-fen,GAO Shun-wei.Lake Cycle and Its Paleoclimatic Significance in Eastern Hexi Corridor. J. Lake Sci.1999,11(3):225-230. DOI:10.18307/1999.0306
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河西走廊东段湖泊旋回及其古气候意义
王乃昂, 李吉均, 穆得芬, 高顺尉
兰州大学地理科学系, 兰州 730000
摘要:
以河西走廊东段石羊河尾闾青土湖为例, 通过对志云村剖面沉积气候记录的研究, 证实季风边缘区百年以上时间尺度的气候变化, 具有暖湿、冷干的阶段性特征自6000aBP以来, 河西走廊东段湖泊旋回经历了四次湖退和三次湖进过程, 除最后一次湖退直至干涸受人类活动影响较大外, 其它主要是气候阶段性变化的结果, 青土湖全新世中期以来的演变, 具有沉积连续、沉积速率大和分辨率高的特点, 不仅可以作为古环境与古气候变化的自然记录, 而且可根据湖泊沉积旋回揭示东亚季风的强度变化.
关键词:  全新世  湖泊旋回  气候变化  人类活动  河西走廊
DOI:10.18307/1999.0306
分类号:
基金项目:国家自然科学基金,(49731010);教育部博士点专项科研基金
Lake Cycle and Its Paleoclimatic Significance in Eastern Hexi Corridor
WANG Nai-ang, LI Ji-jun, MU De-fen, GAO Shun-wei
Deportment of Geography, Lanzhou University, LanZhou 730000
Abstract:
A preliminary study on the advance and retreat of Qingtu Lake, Hexi Corridor and the sedimentary climatic records of Zhiyun Village profile has been made through comprehensive analysis.The study shows that the modes characteristics of climatic change in Eastern Hexi Corridor was provided with the corresponding relationship of warm-moist and cold-dry during the scale longer than hundreds of years.As a result of periodicity of climatic change and human activities, Qingtu Lake cycle has undergone a cycle since 600aBP with four lake-retreat and three lake-advance stages.In brief, the evolution of lakes in Eastern Hexi Corridor is characterized by sedimentary continuity, faster sedimentary rate and higher resolution, which not only can indicate the paleoenvironmental and climatic change in Holocene, but also can reflect the intensity of Eastern Asia monsoon.
Key words:  Hexi Corridor  Holocene  lake cycle  climatic change  human activitiy
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