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Summer water vapor Sources in Northeast Asia and East Siberia revealed by a moisture-tracing atmospheric model

机译：夏季水蒸气资源在东北亚和东西伯利亚透露水分追踪大气模型

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摘要

Previous studies found a seesaw pattern of summer precipitation between northeast Asia and east Siberia on an interannual time scale, which is associated with an eastward-propagating atmospheric wave train over Eurasia and corresponding water vapor transport circulations. Using a general circulation model with an embedded water-tagging module, the main water vapor sources of the two regions, as well as the relative contributions of each source region to the total precipitation for both the climatologi-cal mean and interdecadal variation, are further compared in this study. The model simulation results show that local evaporation, the Pacific Ocean, and East Asia are the dominant moisture sources for northeast Asian precipitation. In contrast, for east Siberia, moisture mainly originates from the Pacific Ocean, northeast Asia, west Siberia, and local evaporation. This suggests that the local evaporation and Pacific Ocean are both crucial to the moisture supply of the two regions, implying the important roles of the land processes and adjacent oceanic sources. In addition, northeast Asia appears to be the major moisture source for east Siberia, whereas east Siberia has weak impacts on the moisture input for northeast Asia. Further analysis finds that the model simulation can capture interdecadal changes in summer precipitation over the two regions around the late 1990s. This interdecadal change is mainly manifested in the moisture supplies from the Pacific Ocean, North Atlantic Ocean, and east Siberia, which suggests a link with the circulation anomalies under the combined impacts of the Pacific decadal oscillation and the Atlantic multidecadal oscillation.
机译：以前的研究发现，在欧亚亚洲和相应的水蒸气运输循环中，东北亚和东西伯利亚之间的夏季降水和东西伯利亚之间的跷跷板沉淀。使用具有嵌入式水标签模块的一般循环模型，两种区域的主要水蒸气源，以及每个源区的相对贡献，进一步是高潮均值和跨越的变化。在这项研究中比较。模型仿真结果表明，局部蒸发，太平洋和东亚是东北亚洲降水的主要湿度。相比之下，对于东西伯利亚来说，水分主要来自太平洋，东北亚，西西伯利亚以及局部蒸发。这表明局部蒸发和太平洋对这两个地区的水分供应至关重要，这意味着土地过程和邻近海洋来源的重要作用。此外，东北亚似乎是东西伯利亚的主要水分来源，而东西伯利亚对东北亚的水分投入影响薄弱。进一步的分析发现，模型仿真可以在20世纪90年代后期的两个地区捕获夏季​​降水中的跨界变化。这种跨性别的变化主要表现在太平洋，北大西洋和东西伯利亚的水分供应中，这表明在太平洋横向振荡和大西洋多型振荡的综合影响下与流通异常的联系。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2126-2126|共1页
  • 作者

    J. Piao; W. Chen; S. Chen;

  • 作者单位

    Center for Monsoon System Research Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing China;

    Center for Monsoon System Research Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing China;

    Center for Monsoon System Research Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing China;

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