排序方式: 共有20条查询结果,搜索用时 93 毫秒
11.
冬季亚洲大陆冷高压形成和发展的物理机制研究 总被引:1,自引:0,他引:1
本文根据一个两层全球大气环流的谱模式,对大陆冷高压的形成和发展过程的一些物理机制进行了分析探讨,并作了有无地形的对比试验。分析结果指出,对流层大气的辐射冷却和地面感热造成了对流层低层的大陆冷源,以及地形性动力下沉运动控制了高压中心的位置。分析还指出,大陆冷高压形成后,受平流作用向南侵袭,冷高压的移动路径和南侵所达到的纬度与地形作用有关;冬季海面的感热输送使大陆高压入海变性。 相似文献
12.
利用由两层准地转模式简化的低谱模式,得知相当正压结构Rrossby波为平衡态,讨论了具有相当正压结构的Rossby波存在所需条件;并以定常Rossby波(相当正压结构)为基态,导出反映高低层Rossby波位相变化的振荡方程,指出高低层位相差的变化与垂直切交流的扰动、平均层上流函数和热成风流函数波动部分振幅扰动(A’和B’)的关系,说明相当正压结构和斜医结构的Rossby波是相互转换的。 相似文献
13.
14.
By using a linear and stationary atmospheric model (Luo and Jiang, 1994, Zebiak and Cane,1987) and the initial data coming from Zebiak and Cane (1987), the influence of interaction between shift of warm pool and that of the equatorial convergence zone (ITCZ and SPCZ ) on atmospheric surface stream field and divergence field during 82/83 ENSO is analysed by numerical experiments.The results show that SPCZ is more important than ITCZ in developing phase and mature phase of warm event.The interaction of warm Pool and SPCZ is stronger than that of warm pool and ITCZ in the two phases.SPCZ is as important as ITCZ in the initial phase and decline phase of warm event. 相似文献
15.
By using the symmetric equations of atmospheric dynamics in y-z plane with vertical and horizontal shear of wind, the nonlinear ordinary differential equation is derived with the method of travelling wave.Its stability is discussed by using the theory of nonlinear stability and the KDV equation is solved. The effects of linear CISK, nonlinear CISK, inertial stability and vertical shear of wind on the amplitude and the width of isolated inertial gravitational wave are discussed. In order to understand deeply the formation and development of meso-scale synoptic systems, such as the squall line, MCC, the cold surge of Asia high and typhoon, the factors of development of the isolated inertial gravity wave are analysed. 相似文献
16.
17.
18.
19.
台风内核与外围能量发展的物理因子 总被引:2,自引:1,他引:2
利用Anthes关于台风的区域划分以及物理量特征尺度的结果,采用尺度分析方法导出了台风不同区域的控制方程组,又用WKB方法得到各区的波能量方程并进行了讨论。指出影响台风发展的物理因子在各区的异同点:各区都有非定常因子;同时,台风内核及外围中层对流层的因子有涡度和切向风的垂直变化,外围边界层有热成风及其偏差,外围流出层有水平位温梯度,这些因子与重力波适当的移向相配合,可使台风能量发展,强度增大。 相似文献
20.