基本气流

基本气流对赤道Rossby波和重力波的影响

The effects of basic flow on the equatorial Rossby waves and gravity waves

基本气流在垂直方向的切变也不能导致Kel-vin波发生不稳定，只能导致Kelvin波的相速度发生Doppler频移效应。

The vertical shear in the basic flow does not lead to the instability of Kelvin wave but to Doppler frequency shifting of its phase velocity .

该文从f平面线性无粘的二维Boussinesq方程组出发，通过求取函数的极小值，提出了从实测风场资料中提取基本气流的方案。

A f plane approximation , linear and nonviscous two dimensional Boussinesq equations is used to extract basic flow from observational wind field by determining functional minimum .

基本气流含有经圈环流的斜压不稳定充要条件为：K~2<2F和（Usk+Vs1）~2>U0k~2.因而，对纯经向基流也可以出现斜压不稳定。

The sufficient and necessary conditions of baroclinic instability of the basic flow including meridional circulation are K2 < 2F and ( Usk + Vsl ) 2 > c2k2.The baroclinic instability can occur in only meridional flows .

本文应用WKB方法研究了在弱非均匀层结大气中，当基本气流具有弱垂直切变时，重力惯性内波的稳定性问题。

This paper discusses the stability of internal inertial gravity wave in the heterogeneous stratified atmosphere when basic flow appears to be weak vertical shear by the WKB method .

本文从观测事实、理论与数值试验来研究基本气流在ENSO事件对北半球冬季大气环流影响中的作用。

Role of basic flow in the influence of the ENSO event on the winter circulation over the Northern Hemisphere is investigated from the observational facts , the theory and the numerical experiments in this paper .

本文在半地转近似下，采用相平面方法讨论了纬向基本气流对线性和非线性地形Rossby波的稳定性及解的性质的影响。

The effects of zonal flow on the stability of linear and nonlinear orograph-ic Rossby waves and their solutions by adopting the phase plane method under the semi-geostrophic approximation are discussed in this paper .

波射线的分析表明，在纬向基本气流为常数的情况下，辐散风作用下的低频Rossby波从初始位置到反射纬度的传播路径表现为一段光滑的大弧；

Rossby wave ray analysis indicates that for the constant zonal basic flow , the path along which Rossby wave with divergent wind propagates from initial location to reflection latitude is regarded as a piece of smooth arc .

ELNino事件中低纬[]SST是异常经圈环流产生的重要外强迫源，但其影响程度受基本气流和[]SST及[]SST的季节变化和年际差异的影响甚大。

El Nino-related ] [ SST in the low latitude is an important outer-forcing source for anomaly meridinal circulation , which is affected by seasonal variation of basic air flow and [ ] SST , and interannual and interdecadal changes of [ ] SST .

另外本文还分析了基本气流水平结构的变化对正压不稳定能量转换的影响，定性地解释了急流附近定常Rossby波列强度的变化。

In addition , the effect of the horizental struture variations of basic flow on the conversion of the barotropic instability energy is analyzed in this paper too , and the variations of the stationay Rossby wave train intensity near jet is explained .

为了解决观测和理论研究中的一些问题以及更好地了解热带大气动力学，有必要进一步研究基本气流的变化对大气中赤道Rossby波动的影响。

In order to tackle the questions arising from the observations and theoretical studies , and to better understand tropical atmospheric dynamics , it is necessary to investigate further the effects of the varying basic states of the atmosphere upon the equatorial trapped nonlinear Rossby waves .

因此本文认为40&50天低频振荡是全球尺度的现象，它是一涉及到热带对流加热、赤道Kelvin波、亦道Rossby波、二维Rossby波列以及基本气流等动力学相互作用的过程。

Finally . it is suggested that 40-50 day oscillation of the global scale is a dynamical process of interaction associated with the tropical convection , the equatorial Kelvin and Rossby waves , the two dimensional Rossby wavetrains in the middle and high latitudes and the basic flow .

初值问题的研究发现中高纬大气30－60d振荡呈纬向三波模态发展，与初始扰动和基本气流的冬、夏差别无关。

The investigation on the initial value problem reveals that the atmospheric 30-60 day periodic oscillation develops stably on the zonal 3-wave mode , and is independent of the initial disturbance as well as the discrepancy of the basic currents between winter and summer .

以平直西风为基本气流的扰动方程中不出现这种现象。

This does not happen in a purely zonal basic current .

基本气流和大地形对于正压波动的作用

The effects of basic flow and topography on the barotropic disturbances

正压大气中热带强迫响应和冬季基本气流的相互作用

Interactions of tropical forcing responses and wintertime basic flow in BAROTROPIC ATMOSPHERE

基本气流在局域流型演化过程中的作用

Effect of the Basic Current on Evolutional Characteristics of Local Flow Patterns

低层基本气流对台风的引导作用

The steering effect of the lower tropospheric basic currents on the typhoon movement

本文考虑了基本气流的作用。

The effects of the basic current are considered .

基本气流的垂直切变作用下的低纬低频波

The Effect of Vertical Shear of Basic Flow on Low-Frequency Waves in Tropics

一个诊断基本气流中波动的新物理量&Eliassen-Palm通量

A new physical flux for diagnosing wave on the basic flow eliassen-palm flux

本文主要研究了斜压基本气流中中尺度对称型扰动发展的问题，旨在揭示中尺度扰动发展的内在本质。

The effects of baroclinic basic flow on a paralleled mesoscale disturbance development are researched .

并着重讨论了有限振幅扰动波包与纬向基本气流之间的能量输运过程。

The energy transfer process between finite-amplitude disturbance wave ensemble and zonal mean flow is described .

用实测风场资料提取基本气流

Extracting basic flow from observational wind

东风波天气区域分布与基本气流垂直切变的关系

The Relationship between the Weather in an Easterly Wave and the Vertical Shear of Basic Air Flow

东南亚基本气流与台风发生的一些事实的统计与分析

A preliminarily statistic and synoptic study about the basic currents over southeastern Asia and the initiation of typhoons

分析表明，赤道西风是印度洋低纬地区的一支重要的基本气流。

It shows that these equatorial westerlies are an important basic current in the low latitudes in Indian Ocean .

采用无基本气流的无辐散正压模式模拟了双热带气旋的运动。

The motion of binary tropical cyclones is numerically simulated using a nondivergent , barotropic model with no basic flow .

台风涡旋有沿基本气流绝对涡度梯度方向的次级运动分量。

The vortex has a secondorder dynamic component in the direction of the gradient of absolute vorticity of the steering flow .

作者利用该EliassenPalm通量关系对2002年12月一次寒潮过程中200hPa等压面上纬向基本气流的发展演变进行了诊断分析。

The relation is applied to diagnosing the evolution of the basic zonal flow at 200 hPa in a cold wave .