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ISSN 1006-9895

CN 11-1768/O4

春季青藏高原积雪年际变率的年代际转型对东亚夏季风影响的研究
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厦门大学海洋与地球学院

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国家自然科学基金重点项目(42030602和42305016)和近海海洋环境科学国家重点实验室(厦门大学)博士后基金资助共同资助


Research progress on the influence of interdecadal transition of interannual variability of spring snow over the Tibetan Plateau on East Asian summer monsoon
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State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University

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    摘要:

    冬春青藏高原积雪异常是东亚夏季风的重要预测因子之一。本文系统回顾了近20年关于高原积雪年际变率的年代际转型影响东亚夏季风的相关研究,主要结论如下:(1)1990s初春季青藏高原积雪的年际变率从东西偶极型转变为全区一致型,这主要受北太平洋、热带大西洋海温异常变化的影响,也与南极涛动、北极涛动的变化密切相关;(2)春季青藏高原积雪年际变率的年代际转型可通过影响东亚高层的副热带西风急流和低层的水汽输送,进而影响东亚夏季风降水格局变化;(3)青藏高原积雪异常可通过“高原大气河”的机制影响梅雨雨带;(4)大西洋年代际振荡可调节春季青藏高原积雪与梅雨降水关系的年代际变化,当大西洋年代际振荡为正(负)位相时,春季青藏高原积雪与梅雨的关系加强(减弱)。最后,本文对青藏高原积雪异常影响东亚季风变化的关键科学问题进行了讨论与展望。

    Abstract:

    Tibetan Plateau (TP) snow anomalies (TPSA) in winter-spring is one of the important predictors of the East Asian summer monsoon (EASM). This paper systematically reviews the studies on the impacts of the interdecadal transition of TPSA on the EASM in recent 20 years. The main conclusions are as follows: (1) interannual variability of the TPSA shows a striking shift from an east-west dipole to a mono-sign structure, which was affected by the sea surface temperature anomalies in the North Pacific and tropical Atlantic, and also bound up with the Antarctic Oscillation and Arctic Oscillation. (2) The interdecadal change of the TPSA in spring influences the EASM precipitation by impacting the subtropical westerly jet in the upper troposphere and the low-level moisture transport. (3) The TPSA can impact the Meiyu rain belt through the “TP atmospheric river” mechanism. (4) The Atlantic Muti-decadal Oscillation can modulate the relationship between the spring TPSA and the Meiyu precipitation. This relationship is robust (weak) during the positive (negative) phase of the Atlantic Muti-decadal Oscillation. Finally, this paper discusses the and prospects the key scientific issues in the influence of the TPSA on the EASM.

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历史
  • 收稿日期:2023-04-18
  • 最后修改日期:2023-09-25
  • 录用日期:2023-10-09
  • 在线发布日期: 2023-10-26
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