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20世纪90年代末东亚冬季风年代际变化特征及其内动力成因

黄荣辉 刘永 皇甫静亮 冯涛

黄荣辉, 刘永, 皇甫静亮, 冯涛. 20世纪90年代末东亚冬季风年代际变化特征及其内动力成因[J]. 大气科学, 2014, 38(4): 627-644. doi: 10.3878/j.issn.1006-9895.2013.13245
引用本文: 黄荣辉, 刘永, 皇甫静亮, 冯涛. 20世纪90年代末东亚冬季风年代际变化特征及其内动力成因[J]. 大气科学, 2014, 38(4): 627-644. doi: 10.3878/j.issn.1006-9895.2013.13245
HUANG Ronghui, LIU Yong, HUANGFU Jingliang, FENG Tao. Characteristics and Internal Dynamical Causes of the Interdecadal Variability of East Asian Winter Monsoon near the Late 1990s[J]. Chinese Journal of Atmospheric Sciences, 2014, 38(4): 627-644. doi: 10.3878/j.issn.1006-9895.2013.13245
Citation: HUANG Ronghui, LIU Yong, HUANGFU Jingliang, FENG Tao. Characteristics and Internal Dynamical Causes of the Interdecadal Variability of East Asian Winter Monsoon near the Late 1990s[J]. Chinese Journal of Atmospheric Sciences, 2014, 38(4): 627-644. doi: 10.3878/j.issn.1006-9895.2013.13245

20世纪90年代末东亚冬季风年代际变化特征及其内动力成因

doi: 10.3878/j.issn.1006-9895.2013.13245
基金项目: 国家自然科学重点基金项目41230527,国家重点基础研究发展计划项目2010CB950403、2012CB417203、2013CB430201、2009CB421405,国家自然科学基金项目41205055

Characteristics and Internal Dynamical Causes of the Interdecadal Variability of East Asian Winter Monsoon near the Late 1990s

  • 摘要: 为纪念陶诗言先生对东亚冬季风研究的杰出贡献,本文利用我国测站、NCEP/NCAR和ERA-40/ERA-Interim再分析资料分析了我国冬季气温和东亚冬季风在20世纪90年代末所发生的年代际跃变特征及其内动力成因。分析结果表明:从20世纪90年代末之后,我国冬季气温和东亚冬季风发生了明显的年代际跃变。从1999年之后,随着东亚冬季风从偏弱变偏强,我国冬季气温变化从全国一致变化型变成南北振荡型(即北冷南暖型),并由于从1999年之后我国北方冬季气温从偏高变成偏低,故冬季低温雪暴冰冻灾害频繁发生,同时,我国冬季气温和东亚冬季风年际变化在此时期从以往3~4 a周期年际变化变成2~8 a周期;并且,结果还表明了东亚冬季风此次年代际变化是由于西伯利亚高压和阿留申低压的加强所致。本文还从北极涛动(AO)和北半球准定常行星波活动的动力理论进一步讨论了此次东亚冬季风年代际跃变的内动力成因及其机理,结果表明:从20世纪90年代末之后,北半球冬季准定常行星波在高纬地区沿极地波导传播到平流层加强,而沿低纬波导传播到副热带对流层上层减弱,这造成了行星波E-P通量在高纬度地区对流层和平流层辐合加强,而在副热带地区对流层中、上层辐散加强,因而导致了北半球高纬度地区从对流层到平流层纬向平均纬向流和欧亚上空极锋急流减弱,而副热带急流加强,这造成了AO减弱和东亚冬季风加强。
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  • 收稿日期:  2013-08-14
  • 修回日期:  2013-10-23

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