排序方式： 共有8条查询结果，搜索用时 15 毫秒
1
1.
Case experiments of monthly predictions of eight winter months during 1976-1977 and 1982-1983 El Nino events are performed by using a three-layer anomalous filtered model (AFM), in which transient Rossby waves are filtered. The results show that this model predicts successfully the large-scale patterns of the monthly mean surface temperature anomalies. The correlation coefficients between observations and predictions are basically higher than those of persistence predictions. By comparison with the anomalous general circulation model (AGCM) the AFM gives almost the identical results, but the computation time required for running the AFM is nearly 100 times less than that required for running the AGCM. It is also shown that the results of the three-layer model are better than those of the one-layer model. In the meanwhile, four seasonal forecasts are also carried out by using the same model. It seems that the AFM possesses potential ability in predicting large-scale circulation anomalies.On the basis of 相似文献
2.
3.
NUMERICAL EXPERIMENT OF THE INFLUENCES OF HEAT AND WIND STRESS ON THE EQUATORIAL OCEAN CIRCULATION 总被引：1，自引：0，他引：1 
下载免费PDF全文
下载免费PDF全文 A time-dependent linear model on the equatorial beta plane is developed in this paper.Its verticalstructure consists of two active layers with equal density and temperature above the thermocline and aquasi-stationary layer with constant density below the thermocline.The results of nurnericat experiments show that the direct influence of heat on the equatorial ocean ismuch smaller than that of wind stress.Nevertheless,through the tropical ocean-atmosphere interaction,the change of wind stress resulting from the thermal forcing may set a determinant effect on the equilibriumand anomalous development of the ocean-almosphere circulation. 相似文献
4.
冷锋过境时的边界层阵风结构分析 总被引：7，自引：2，他引：7
本文对冷锋过境时强风条件下平均风速、阵风、阵风系数、阵风谱、水平和垂直自相关进行了计算和分析。证明在强风条件下各层最大风速可以通过平均风速乘以各层的大于1的阵风系数求得。并且指出,该阵风系数随高度呈负指数规律变化。 阵风谱和自相关函数的计算结果表明,所有大气湍流统计量都与高度有关。320米以下各层阵风谱的含能区均在20秒到20分钟周期范围内,呈现出多峰值现象,而且含能区的峰频随高度明显地向低频方向移动。湍流总动能随高度的分布不是单一性减小的,而且在30米和150米高度附近出现两个极大值。阵风的水平自相关和 相似文献
5.
本文以温盐剖面数据为基础，应用σ坐标下地转流方程诊断分析了西北太平洋上层旬平均流。结果表明，西边界流等强流系的诊断结果虽然强度偏弱，但流径和季节变化规律与观测事实大致相符。弱流区的诊断结果往往被噪音污染。 相似文献
6.
本文用海—气耦合三层距平滤波模式(AFM)作了1976—1977以及1982—1983两个EINino事件年冬季八个月预报个例实验。其结果表明,该模式成功地预报了大尺度月地表温度距平场,预报与实况的相关系数基本上都超过了惯性预报。与距平大气环流模式(AGCM)相比,两者的结果相差不大,但AFM可节省近一百倍的计算时间。与此同时,我们还作了季节预报试验,即提前三个月作月预报,完成了1977年2月、3月和1983年2月、3月四个试验例子。结果表明,用该模式作大尺度环流的季节异常预报的潜力是存在的。最后,结合本文的结果,我们把提出距平滤波模式以来近十年的工作作了小结,对模式的预报能力作了评价。 相似文献
8.
1