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气温和亚洲季风降水变化影响青藏高原冰川的进退,念青唐古拉山西段末次冰期年代的研究能够为认识季风影响过渡带的冰期气候特征提供重要依据.然而,该地区末次冰期时代及其南北坡是否存在差异仍不确定.本文采用10Be暴露测年方法,对青藏高原南部的念青唐古拉山西段北坡的爬玉王山谷谷口两道冰碛垄的年代进行测定,确认内侧冰碛垄为末次冰盛期产物,年代为(18.0±1.7)~(30.6±2.8)ka(n=10).外侧冰碛垄时代为(18.0±1.6)~(39.9±3.7)ka(n=5),可能对应MIS3阶段或更早的冰进.与念青唐古拉山西段南坡10Be暴露年代对比表明,念青唐古拉山西段末次冰期最大规模冰进可能发生在MIS3阶段,与全球降温不同步,具有异时性,但在区域内则具有同时性,可能响应北半球千年尺度气候变化.
The change of temperature and Asian monsoon precipitation affect the glacier retreat and retreat in the Qinghai-Tibet Plateau, and the study of the age of the last glacial period in the western segment of the Nyainqentanglha Mountains can provide an important basis for understanding the climatic characteristics of glaciations during the monsoon-affected transitional zone. The difference is still uncertain.This paper uses the 10Be exposure dating method to determine the dates of two moraines ridge in the valley mouth of the jade king valley in the northern section of the southern Qinghai-Tibet Plateau of the southern section of the Nyainqentanglha Mountain, confirming that the inner moraine ridge is the last ice (18.0 ± 1.7) ~ (30.6 ± 2.8) ka (n = 10), while the outer moraine ridge was (18.0 ± 1.6) ~ (39.9 ± 3.7) ka (n = 5) MIS3 or earlier glaciation.Comparisons with the 10Be exposures on the southern slope of the western section of the Nyainqentanglha Mountain indicate that the largest ice in the last glacial stage of the western section of the Nyainqentanglha Mountain may occur in the MIS3 stage and is not synchronous with the global cooling, , But simultaneously within the region, it is possible to respond to millennial climate change in the northern hemisphere.