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Vegetation and climate change since the late glacial period on the southern Tibetan Plateau
Palaeogeography, Palaeoclimatology, Palaeoecology ( IF 3 ) Pub Date : 2021-04-14 , DOI: 10.1016/j.palaeo.2021.110403
Jian'en Han , Maotang Cai , Zhaogang Shao , Feng Liu , Qianqian Zhang , Shuqin Zhang , Jia Yu , Xinling Li , Zhigao Zhang , Dagang Zhu

A well-dated pollen record from the Lake Mabu co, located on the southern Tibetan Plateau, provides a history of vegetation and climate change from the late glacial period to the Holocene. Before 17,090 cal yr BP, the vegetation type was alpine steppe desert with a cold and dry climate on the southern Tibetan Plateau. The high percentages of extra arboreal pollen (Pinus) indicate that the climate was mainly controlled by strong Westerlies. After 17,090 cal yr BP, alpine meadows mainly consisting of Cyperaceae were widely distributed in the study area. This shift in vegetation type may have been induced by increasing Indian Summer Monsoon (ISM) precipitation and atmospheric CO2 concentrations. The expansion of the montane mixed forests after 12,480 cal yr BP indicates that vertical migration of the vegetation belt occurred under the influence of a strong ISM and climate warming. These vegetation changes suggest that the climate has gradually become moister and warmer since the late glacial period, which is consistent with the intensified ISM and the summer solar insolation of the Northern Hemisphere.



中文翻译:

自青藏高原冰川晚期以来的植被与气候变化

位于青藏高原南部的马布湖(Lake Mabu co)的一份良好的花粉记录提供了从冰川晚期到全新世的植被和气候变化的历史。在17,090 cal BP之前,青藏高原南部的植被类型为高山草原,气候寒冷干燥。多余的树栖花粉(松属)含量很高,表明气候主要受强西风控制。在17090 cal yr BP之后,主要由莎草科组成的高寒草甸在研究区内广泛分布。植被类型的这种变化可能是由于印度夏季风(ISM)降水增加和大气中的CO 2引起的浓度。在12480 cal BP之后,山地混交林的扩张表明植被带的垂直迁移是在强烈的ISM和气候变暖的影响下发生的。这些植被变化表明,自冰川期后期以来,气候已逐渐变得湿润和温暖,这与ISM加剧和北半球夏季的日照有关。

更新日期:2021-04-14
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