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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau
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Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau

机译：自青藏高原北部最后冰川最大冰川最大自冰水最大射门射门控制气候变化模式

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摘要

Climate change from the northern Qinghai-Tibet Plateau (QTP) is affected by the combined effects of the Asian summer monsoon and the westerlies. However, changes in monsoon vapor transport and the westerly jet stream, as well as their effect to climate change mode there, are not clear at different time scales. Here we present composite research using paleoclimate reconstructions and ensemble simulations since the Last Glacial Maximum (LGM) on the basis of an eolian sedimentary sequence in the northern QTP. Results from 317 surface sediment samples show that pedogenic carbonate delta O-18 is affected both by precipitation and temperature, and organic carbon isotope (delta C-1(3)org) reflects the vegetation growth status in areas where precipitation is greater than 290 mm. Proxies from the sedimentary sequence and the Paleoclimate Modeling Intercomparison Project 3 (PMIP3) simulations show a close relationship between climate change mode in the northern QTP and the westerly jet stream whose movement is triggered by warm or cold conditions in the high-latitude regions. That is, when the climate is in cold/glacial period the westerly jet stream strengthens and moves southward, and the mountains become wetter. This climate change mode can be validated by records from mountains of North America and Africa. According to the CMIP5 simulations, the westerly jet stream will strengthen in the future, and climate in the northern QTP and the high-altitude region of the mid-latitudes will become wetter with global warming. (C) 2020 Elsevier B.V. All rights reserved.
机译：青藏高原北部的气候变化（QTP）受亚洲夏季季风和西风的综合影响的影响。然而，季风蒸汽运输和西部喷射流的变化，以及它们对在那里的气候变化模式的影响，在不同的时间尺度上不明确。在这里，我们在北QTP中的Eolian沉积序列的基础上使用古古典重建和集合仿真来呈现综合研究。结果来自317个表面沉积物样品，表明，碳酸碳酸甜度ΔO-18受到沉淀和温度的影响，有机碳同位素（Delta C-1（3）组织）反映了沉淀大于290mm的区域的植被生长状态。来自沉积序列的代理和古古镇建模互通项目3（PMIP3）模拟显示了北方QTP中的气候变化模式与西方射流流之间的紧密关系，其运动通过高纬度地区的温暖或冷条件触发。也就是说，当气候在冰冷/冰川时期时，西风流动加强和向南移动，山脉变得潮湿。这种气候变化模式可以通过北美和非洲山脉的记录验证。根据CMIP5模拟，西方喷射流将于将来加强，北QTP的气候和中纬度的高海拔地区将变得潮湿，全球变暖。 （c）2020 Elsevier B.v.保留所有权利。

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  • 作者

    Li Yu; Peng Simin; Liu Hebin; Zhang Xinzhong; Ye Wangting; Han Qin; Zhang Yuxin; Xu Lingmei; Li Yichan;

  • 作者单位

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

    Lanzhou Univ Coll Earth &

    Environm Sci Ctr Hydrol Cycle &

    Water Resources Arid Reg Key Lab Western Chinas Environm Syst Minist Educ Lanzhou 730000 Peoples R China;

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  • 正文语种 eng
  • 中图分类 天文学、地球科学;行星、卫星、彗星、流星、陨星;
  • 关键词

    westerly jet stream; climate change mode; eolian sediments; climate simulations; Last Glacial Maximum;

    机译：西方喷射流;气候变化模式;烧灼沉积物;气候模拟;最后冰川最大;

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