冬季南北半球际大气质量涛动与东亚冬季风异常联系的模式验证
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1.南京信息工程大学 气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心;2.无锡大学 中国气象局生态系统碳源汇重点开放实验室,江苏 无锡214063

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基金项目:

国家自然科学基金(41975073);国家重点研究与发展计划(2019YFC1510201),上海市科学技术委员会(20dz1200401);无锡大学引进人才科研启动基金


Model verification of the relationship between inter-hemispheric atmospheric mass oscillation and East Asian winter monsoonLeiSZhong1, ChuhanSLu12, NianSQiao1, ZhaoyongSGuan1
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Affiliation:

1.Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044 , China;2.Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA),Wuxi University, wuxi 214063, China

Fund Project:

the National Natural Science Foundation of China (Grant No. 41975073), the National Key Research and Development Program of China (Grant No. 2019YFC1510201), Shanghai Science Committee (20dz1200401) and Wuxi University Research Start-up Fund for Introduced Talents.

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    摘要:

    南北两半球大气中高纬度之间的相互作用与季风等跨半球的天气气候系统存在着密切联系,由于涉及全球范围的大尺度环流与能量变化,其联系途径与机理受到学者们的广泛关注。本文结合ERA5再分析资料以及CMIP6中MPI-ESM1-2-HR模式历史输出资料,验证了冬季南北半球大气质量涛动(IHO)与东亚冬季风异常的联系及其对中国冬季气温的影响。研究表明,再分析资料以及模式结果均表明冬季IHO与东亚冬季风存在显著的正相关关系。IHO通过全球大气质量再分配与东亚冬季风建立起紧密的联系。当IHO为正位相时,大气质量在欧亚大陆北部异常堆积,而在中低纬地区异常亏损,这使得东亚地区海陆气压差明显增大,冬季风增强,同时对我国华中地区冬季地表气温具有显著影响,反之亦然。进一步分析发现,热带低平流层气温可以通过剩余环流调节臭氧含量经向分布影响南极对流层气温,从而对IHO年际变化起主要的驱动作用。

    Abstract:

    Based on the reanalysis data of ERA5 and the historical output data of MPI-ESM1-2-HR model in CMIP6, the relationship between the inter-hemispheric atmospheric mass oscillation (IHO) and East Asian winter monsoon (EAWM) and its effect on winter temperature in China are verified. The results of reanalysis and model indicate that there is a significant positive correlation between winter IHO and East Asian winter monsoon. The IHO is closely related to the EAWM through the redistribution of global atmospheric mass. When the IHO is positive phase, the atmospheric mass accumulates abnormally in the northern part of Eurasia, but loses abnormally in the middle and low latitudes, which makes the ocean-land pressure difference in East Asia increase significantly, and the EAWM intensification. At the same time, it also significant cooling the winter surface temperature in central China, and vice versa. Further analysis shows that the temperature in the tropical lower stratosphere can affect the atmospheric temperature in the Antarctic troposphere by regulating the meridional distribution of ozone content through the residual circulation, thus playing a major driving role in the interannual variation of IHO.

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历史
  • 收稿日期:2023-05-18
  • 最后修改日期:2023-07-08
  • 录用日期:2023-12-18
  • 在线发布日期: 2024-05-21
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