Study of Cryosphere, Atmosphere, Ocean Interaction in the Global Climate System

全球气候系统中冰冻圈、大气、海洋相互作用研究

基本信息

批准号：
01460055
负责人：
YASUNARI Tetsuzo
金额：
$ 2.18万
依托单位：
Institute of Geoscience, University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460055/
关键词：
Monsoon Enso Q^<13>O Climate System Atmosphere Ocean Interaction Cryosphere Interaction El Nino ENSO 大気・海洋担互作用雪氷大気海洋 ABO 担互作用 QBO

项目摘要

The role of the Asian summer monsoon on the interannual variability of the global climate system particularly relevant to the ENSO time scales is discussed, by examining the statistical and dynamical links between the Asian summer monsoon, the atmosphere/ocean system in the tropics and the westerly flow regimes in the extratropics.The Asian monsoon, the ocean and the atmosphere in the tropical Pacific are tightly linked together as one climate system, named here as the MAOS (Monsoon and the Coupled Atmosphere/Ocean System). The MAOS prominently shows the biennial oscillatory nature which tends to have anomalous states starting in the northern summer monsoon season and persisting for about one year (Yasunari, 1990a : 1991).The anomalous state of the MAOS produces the anomalous atmospheric circulation over the subtropics and the extratropics of the north Pacific during summer through the early winter, through the modulation of the subtropical high and the stationary Rossby wave propagati … More on mechanism. In the mid winter, this anomalous circulation over the north Pacific is evolved to the hemispheric winter anomalous circulation with wavenumber-one and/or-two structure.The anomalous circulation over Eurasia associated with this hemispheric anomalous flow regime seems to provide a favorable condition for the extensive (or diminished) snow cover area over central Asia, which in turn is responsible for the reversed anomalous state of the next Asian summer monsoon and the MAOS. That is, the biennial nature of the climate system in the northern hemisphere may be due, at least partly, to this two-way interactions between the tropics and the extratropics. In these, processes, the Asian monsoon plays a key role as a transmitter of climate signals between the tropics and the extratropics through the land/atmosphere/ocean interaction in the seasonal cycle.In addition, it is strongly suggested that the North Atlantic Oscillation (NAO), in reality, plays a crucial role in the timing of the occurrence of the ENSO event, by stochastically amplifying or damping the biennial oscillation of this coupled climate system. That is, the more or less irregular ENSO cycle may result from this interaction between the MAOS and the NAO, where the former seems to have the nature of an almost-intransitive climate system, while the latter seems to represent the more chaotic nature of the westerly flow regime. Less

通过检查亚洲夏季季风，热带和西方流动方案的大气和西方流动状况，亚洲人和西方流动系统的统计和动态联系，讨论亚洲夏季季风之间的统计和动态联系，讨论亚洲夏季季风之间的统计和动态联系，从而，讨论了亚洲人的统计和动态连接，从而，亚洲人和西方人的气氛是亚洲人的海洋和西方的，这是亚洲奇异的链接，而是在亚洲人的气氛中，请按照海洋和西方的气氛，讨论了亚洲夏季季风的际变化，从而讨论了与ENSO时间量表的年际变化。 MAOS（季风和耦合气氛/海洋系统）。毛泽华州突出显示了每两年一次的振荡性质，这种振荡性倾向于从北部夏季季风季节开始异常状态，并持续了大约一年（Yasunari，1990a：1991：1991）。毛主义的异常状态。异常的异常气氛可在北方的夏季和夏季通过冬季的冬季播放，从而产生异常的大气循环。固定的Rossby Wave宣传…更多关于机制的信息。在冬季中期，这个北太平洋上的异常圆将演变为半球冬季异常圆，带有波数 - 一个和/or-two结构。欧亚大陆上的异常圆圈与该半球异常流动相关的欧亚大陆上的异常圆圈似乎为在境内覆盖了境内的广泛（或下降），这是一个对境内造成的（或降低）的有利状况，这是一个负责的境地，这是一个责任的行动，这是在Asia上的行动，而这是在ASIA上的行动。季风和毛泽东。也就是说，北半球气候系统的每两年一次的性质可能至少部分归因于热带与热带地区之间的这种双向相互作用。在这些过程中，亚洲季风是在季节性周期中通过土地/大气/海洋互动之间通过土地/气氛/海洋互动之间气候信号的发射器发射的关键作用。此外，强烈表明，北大西洋振荡（NAO）在现实中起着至关重要的作用。这种耦合气候系统的双年展振荡。也就是说，MAOS和NAO之间的这种相互作用可能或多或少不规则的ENSO循环可能导致前者的性质几乎是侵入性气候系统的性质，而后者似乎代表了西方流动状态的更混乱的性质。