Review of the timing and extent of glaciers during the last glacial cycle in the bordering mountains of Tibet and in East Asia
Review of the timing and extent of glaciers during the last glacial cycle in the bordering mountains of Tibet and in East Asia
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DOI：
10.1016/j.quaint.2006.02.012
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发表时间：
2006-10
影响因子：
2.2
通讯作者：
Zhang Wei;Cui Zhijiu;L. Yonghua
中科院分区：
文献类型：
--
作者：
Zhang Wei;Cui Zhijiu;L. Yonghua
新的加速器质谱14C（AMS14C）、电子自旋共振（ESR）和热释光（TL）数据显示，末次冰期早期/中期（MIS3-4）部分的冰川范围大于末次冰期末期（MIS2）的冰川范围。冰川作用与北半球冰盖极大期和主要控制全球气候的海洋环流的变化并不同步。研究区存在三种控制冰川积聚和消融的季节性降水模式。包括东亚沿海岛屿在内的西风带主导地区，冰川推进的主要原因是冬季降水增加。这些冰川在冰川阶段会扩张。相比之下，大陆内陆夏季降水为主的地区，除藏东南季风高降水区和横断山脉外，主要冰期往往不发育大型冰川。
New accelerator mass spectrometry14C (AMS14C), electron spin resonance (ESR) and thermoluminescence (TL) dates for glacial successions in Tibetan bordering mountains and in East Asia show that glacier extent during the early/middle (MIS3-4) parts of the last glacial cycle was larger than that of the late stage (MIS2) in last glacial cycle. Glaciation was not synchronous with the North Hemisphere ice sheet maxima and changes in oceanic circulation that predominately control global climate. There exist three seasonal precipitation patterns that control the accumulation and ablation on glaciers in the study areas. Areas dominated by Westerlies, including the East Asia coastal islands, experience glacier advance mainly because of increased winter precipitation. These glaciers expand during glacial stages. In contrast, in areas dominated by summer precipitation in the interior of mainland, except in the monsoonal high precipitation zone in southeast Tibet and the Hengduan Mountain range, tend not to develop large glaciers during major glacial stages.