用简化的海—气耦合模式模拟大尺度海—气相互作用     

金音  孙照渤 《南京气象学院学报》1993,(1)

用一个简化的海—气耦合模式,首先模拟出了地—海—气系统从季节到年际的相互作用,随后在此基础上,试验了赤道地区海表温度正距平对印度季风的可能影响。  相似文献   

用赤道东太平洋海温预报西太平洋热带气旋年际变化的探讨   总被引：1，自引：0，他引：1       下载免费PDF全文

蒋国荣  沙文钰 《热带气象学报》1993,(3)

根据实际应用中统计预报对相关系数的基本要求,利用相关分析探讨了用赤道东太平洋海温预测西太平洋热带气旋年际变化的可行性。同时,利用谱分析方法探讨了这种预报的有效性和局限性。主要结论是:用区域(5°N—5°S,90—150°W)的平均海温预测西太平洋热带气旋的年际变化,效果比使用赤道东太平洋海温好,用前者可预测西太平洋中区各类热带气旋的年际变化,用后者只能预测西太平洋全区及中区热带气旋总体的年际变化,对达到热带风暴或台风的热带气旋的年际变化则分别是勉强能或不能预测;用赤道东太平洋海温无法预测南海热带气旋的年际变化;用赤道东太平洋海温预测西太平洋热带气旋活动实际上只对年际变化中的ENSO(3—5年)周期及准二年周期有效。  相似文献   

ENSO事件发展的时空特征   总被引：3，自引：0，他引：3       下载免费PDF全文

张秋庆  黄荣辉 《大气科学》1993,17(4):395-402

本文利用1951—1988年10°S—50°N太平洋SST资料与EOF分析方法对ENSO事件的发展过程与循环的时空特征进行了分析.分析结果表明EOF第一主分量时间系数的变化可以很好地表示SST距平变化与ENSO事件的发生.并且,第一主分量空间函数分布的变化揭示了一种ENSO事件增温是春季首先始于赤道东太平洋沿岸,随后向西传播到赤道中太平洋的增温过程;而第二主分量空间函数分布的变化揭示了另一种ENSO事件可增温首先始于赤道中太平洋,然后向东传播到赤道东太平洋的增温过程.分析结果还表明,ENSO事件的强度是强弱相间,其周期平均大约为4年左右. 本文还比较了80年代热带太平洋SST的变化及所发生的两次ENSO事件与其它年代所发生的ENSO事件的差别.  相似文献   

A GLOBAL COUPLED OCEAN-ATMOSPHERE MODEL OF SHALLOW WATER WAVE AND ITS NUMERICAL EXPERIMENTS   总被引：2，自引：0，他引：2       下载免费PDF全文

Liu Yimin  Jiang Dayong  Yang Meiyu 《Acta Meteorologica Sinica》1991,5(4):435-441

A global coupled air-sea model of shallow water wave is developed based on coupled ocean-atmospheredynamics.The coupling is realized through the air-sea interaction process that the atmosphere acts on theocean by wind stress and the ocean acts on the atmosphere with heating proportional to sea surface temperature(SST)anomaly.The equation is harotropic primitive one.Response experiments of coupling system arealso carried out SSTA in two categories of intensities.Compared with the results of AGCM simulation ex-periment in which only the dynamic change of air system is considered,it demonstrates that the air-seainteraction between the tropical ocean and the global atmosphere plays a very important role in the evolutionof climate system.The results of numerical simulation show that it is encouraging.  相似文献   

北方涛动同北半球温带大气环流的遥相关(二)——季节变化   总被引：2，自引：0，他引：2       下载免费PDF全文

吴仁广  陈烈庭 《大气科学》1991,15(6):36-45

在以前工作的基础上,本文进一步分析了各个季节北方涛动和与其相联系的北太平洋海温同北半球温带大气环流遥相关的特征,并与南方涛动和赤道太平洋海温的结果进行了比较,发现它们同北半球温带大气环流的遥相关,不仅具有很强的地区性,而且具有明显的季节变化。 冬季,北方涛动和北太平洋海温与PNA型相关非常明显,且比南方涛动和赤道太平洋海温的更密切。除PNA型外,北方涛动还同500hPa高度的亚洲-北美(ANA)流型有联系。 夏季,PNA遥相关型的表现仍然非常清楚,但位置较冬季偏酉和偏北,并在北美西海岸具有特殊的分叉现象。  相似文献   

用逐步迭代法插补海表温度的研究   总被引：1，自引：0，他引：1  

孙照渤  袁建强 《南京气象学院学报》1991,14(2):143-150

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Experimental Seasonal Forecast of Monsoon 2005 Using T170L42 AGCM on PARAM Padma     

J. Venkata Ratnam  D. R. Sikka  Akshara Kaginalkar  Amit Kesarkar  N. Jyothi  Sudipta Banerjee 《Pure and Applied Geophysics》2007,164(8-9):1641-1665

As a part of the Experimental Extended Range Monsoon Prediction Experiment, ensemble mode seasonal runs for the monsoon season of 2005 were made using the National Centre for Environmental Prediction (NCEP), T170L42 AGCM. The seasonal runs were made using six initial atmospheric conditions based on the NCEP operational analysis and with forecast monthly sea-surface temperature (SST) of the NCEP Coupled forecast system (CFS). These simulations were carried out on the PARAM Padma supercomputer of Centre for Development of Advanced Computing (C-DAC), India. The model climatology was prepared by integrating the model for ten years using climatological SST as the lower boundary. The climatology of the model compares well with the observed, in terms of the spatial distribution of rainfall over the Indian land mass. The model-simulated rainfall compares well with the Tropical Rainfall Measuring Mission (TRMM) estimates for the 2005 monsoon season. Compared to the model climatology (7.81 mm/day), the model had simulated a normal rainfall (7.75 mm/day) for the year 2005 which is in agreement with the observations (99% of long-term mean). However, the model could not capture the observed increase in September rainfall from that of a low value in August 2005. The circulation patterns simulated by the model are also comparable to the observed patterns. The ensemble mean onset is found to be nearer to the observed onset date within one pentad.  相似文献   

海温变化对台风路径的影响   总被引：8，自引：2，他引：8  

袁金南  肖伟生 《广东气象》2002,(3):1-2

在台风模式中采用周平均海温和多年的月平均海温，对一些台风个例进行了比较，分析了数值模式中影响台风路径的海温因子变化对台风移动路径的影响。  相似文献   

北太平洋海温与南宁地区后汛期降水量的关系     

何慧 《气象研究与应用》2001,22(4):13-15

利用 195 8- 1995年北太平洋月平均海面温度及南宁地区后汛期 (7～ 9月 )降雨量资料 ,分析了它们之间的相关关系。得出 :南宁地区后汛期降雨量与上年夏季至当年春季的海面温度存在相当明显的遥相关关系。对 1996- 1999年后汛期降雨量进行预测试报 ,并经 2 0 0 0年实际应用 ,得到基本相符的结论  相似文献   

The δ18O in the Guliya shallow ice core during the prevailing summer monsoons and sea-air interactions     

Zhang Xin-ping Ph.D.  Masayoshi Nakawo  Yao Tan-dong 《地理学报(英文版)》2001,11(4):438-448

The correlations of the δ¹⁸O_max in the shallow ice core from the Guliya ice cap on the Tibetan Plateau with the global sea surface temperatures (SST) and height at the 500 hPa over the Northern Hemisphere were analyzed. The correlated regions on oceans that have a significant influence on the δ¹⁸O_max in the Guliya ice core are all located in ocean currents, or convergent regions of currents. They are the eastern Equatorial Pacific, the Northern Pacific Current, the Hot Pool in the eastern Indian Ocean, the Mozambique Current, the Northern Atlantic Current, the Canary Current and the Atlantic Equatorial Current. The δ¹⁸O_max in the Guliya ice core has negative correlations with the SST located in the lower latitudes, and positive correlations with the SST in the middle latitudes. The correlated areas at the 500 hPa that have a great impact on the δ¹⁸O_max are located in the subtropical highs over the mid-low-latitude oceans and the long-wave trough area over Balkhash Lake, where there are marked negative correlations between the heights in those areas and the δ¹⁸O_max. The influencing mechanism is displayed by the diversity of the vapor origins transported to the Guliya region. The strengths of the European ridge and the ridge over Baikal Lake have notable positive correlations with the δ¹⁸O_max. The two systems indirectly influence the vapor transportation towards the Guliya region by the adjustment of long-wave trough and ridge.  相似文献