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geostrophic model
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  地转模式
     A simple baroclinic semi geostrophic model on an equatorial β plane is employed the effects of the vertical shear of the basic zonal geostrophic flow and the variation of the basic potential temperature on the long equatorial Rossby waves . A dimensionless parameter σis introduced to represent the variation of basic potintial temperature field ,in the thermodynamics equation.
     文中应用赤道β平面近似 ,建立一个简单的斜压大气半地转模式 ,在热力学方程中引入表征基本位温场 (θ)经向分布特征的无量纲参数 σ,对线性化的扰动方程进行了频率分析 ,研究基本位温场经向非均匀分布以及基本气流垂直切变对赤道纬向超长尺度 Rossby波动的影响 ,并指出仅考虑基本气流垂直切变或者基本位温场变化的作用是不合适的。
短句来源
     LOW FREQUENCY WAVES FORCED BY LARGE SCALE TOPOGRAPHY IN THE BAROTROPIC QUASI GEOSTROPHIC MODEL
     正压准地转模式中大地形作用下的低频波
短句来源
     Firstly,three main development stages in numerical weather forecast and climate simulation research in our Institute,namely the geostrophic model development stage from 1964 to 1972,four primitive equation model one from 1973 to 1986,and model operation uses and wide application of numerical simulation from 1987 to now,has been classified since the middle 1960's.
     回顾了从60 年代中期以来,我所开展数值预报和模拟研究的三个主要发展阶段,即1964 ~1972 年间的地转模式阶段; 1973 ~1986 年间的四个原始方程模式的发展阶段;
短句来源
  “geostrophic model”译为未确定词的双语例句
     A Barotropic Quasi geostrophic Model with Large scale Orography, Friction and Heating
     含大地形、摩擦、加热的准地转正压模式
短句来源
     SOLITARY WAVES OF THE BAROTROPIC QUASI GEOSTROPHIC MODEL WITH LARGE SCALE OROGRAPHY
     含大地形的准地转正压模式的孤立波解
短句来源
     Starting from a barotropic model equations including large scale orography,friction and heat factor,by means of scale analysis and small parameter method,then a barotropic quasi geostrophic model with large scale orography,friction and heating is obtained.
     从包含大地形、摩擦及加热作用的正压模式方程组出发,通过尺度分析、小参数展开和线性化等方法,导出一个含大地形、摩擦及加热作用的准地转正压模式。
短句来源
     Starting from a modified barotropic quasi geostrophic model equation, considering the actual situation of the large orography of the Qinghai Xizang Plateau, neglecting its east west slope, the solitary waves are obtained using reductive perturbation method. The results show that the orography is an essential factor to excite Rossby solitary waves in basic flow without shear.
     该文由修正过的含大地形的准地转正压模式方程出发,考虑青藏高原大地形的实际情况,忽略其东西向地形坡度,再利用约化摄动方法,求其孤立波解,并得到结论:当基本气流无切变时,地形是产生Rossby孤立波的必要因子.
短句来源
     A two layer quasi geostrophic model forced by surface friction and radiative relaxation is used to study numerically the phenomenon of subcritical instability in baroclinic atmosphere.
     利用一个由表面摩擦和辐射张弛强迫驱动的斜压准地转两层模式作数值试验 ,来研究斜压大气中的亚临界不稳定现象。
短句来源
  相似匹配句对
     Model.
     模型的适用范围。
短句来源
     model.
     模型。
短句来源
     On the Nonlinear Slow Travelling Wave in the Semi-Geostrophic Model
     半地转模式中非线性慢行波解的研究
短句来源
     A SIMPLE QUASI-GEOSTROPHIC COUPLED OCEAN-ATMOSPHERE MODEL
     一个简单的准地转海气耦合模式
短句来源
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  geostrophic model
A detailed test of a simple nonlinear quasi-geostrophic model of stratospheric sudden warming has been performed.
      
We describe a series of sensitivity experiments with a quasi-geostrophic model of the interaction of stationary planetary waves with the mean zonal flow in the stratosphere and mesosphere.
      
Sensitivity experiments with a quasi-geostrophic model of stratospheric sudden warming
      
Barotropic-Baroclinic instability of horizontally and vertically shearing mean monsoon flow during July is investigated numerically by using a 10-layer quasi-geostrophic model.
      
A quasi-geostrophic model is applied to deduce the effect of the topographic complex on the Indian peninsula.
      
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In the long-period numerical forcast models, many factors, such as non-adiabatic heating and friction, must be considered. The object of this paper is to study the stability of long wave under the influence of these factors. A two-level quasi-geostrophic model including the effect of non-adiabatic heating, friction and horizontal austausch (1)-(3) is used. The instability criterion is given as (10). In the case of baroclinic atmosphere without these factors the criterion agrees with that of Phillips'(fig....

In the long-period numerical forcast models, many factors, such as non-adiabatic heating and friction, must be considered. The object of this paper is to study the stability of long wave under the influence of these factors. A two-level quasi-geostrophic model including the effect of non-adiabatic heating, friction and horizontal austausch (1)-(3) is used. The instability criterion is given as (10). In the case of baroclinic atmosphere without these factors the criterion agrees with that of Phillips'(fig. 1). It is found that in barotropic atmosphere the friction and horizontal austausch are purely damping factors. In baroclinic atmosphere it is, however, not so simple. With the parameter A_T=A_v=0.00213 arc~2 day~(-1),k=0.26 day~(-1),ε=1.05 arc~(-2) day~(-1), A_1~2=30.4 arc~(-2), the curves of stability criterion are given in fig. 2. We notice in the figure that for sufficiently short wave or for small wind shear, these parameters are damping factors; but for long waves (m, n<3) the minimum baroclinity for initia'e instability is smaller than that for the case without these factors. Finally, the structure of the unstable wave.is shown in fig. 4a-b. Fig. 4a is without damping factors and the other is with these factors under the same baroclinity. It may be seen that these factors decrease the instability. In the case without damping factors the disturbance starts to damp when the temperature wave and pressure wave are in phase, but in the case with damping factors the disturbance starts to damp when the phase of temperature wave is still left behind the pressure wave (fig. 4c). This is because when the phase of temperature wave is left behind the pressure wave, there is release of potential energy and this energy is used to compensate the frictional loss.

本文中采用二层线性模式讨论了地面摩擦,水平热量交换和动量交换,以及长波辐射冷却等因子对长波稳定状况的影响.并且给出了相应的温压场结构,由理论上证实了当温度波还落后于气压波时,运动就已经开始阻尼的这个事实.

Using a two-layer quasi-geostrophic model with the potential height φ at any specific time expressed as Fourier series, the nonlinear ordinary differential equations are obtained. The evolution of medium-range weather process is investigated. Some effects of the sea-land contrast and the nonlinear interaction between different wave components are considered.It is shown that the zonal circulation is transformed into meridional circulation and the polar anticyclones are created. The transformation of the...

Using a two-layer quasi-geostrophic model with the potential height φ at any specific time expressed as Fourier series, the nonlinear ordinary differential equations are obtained. The evolution of medium-range weather process is investigated. Some effects of the sea-land contrast and the nonlinear interaction between different wave components are considered.It is shown that the zonal circulation is transformed into meridional circulation and the polar anticyclones are created. The transformation of the large-scale circulation is mainly due to the development of ultra-long waves. Some effects of dynamical and thermodynamical factors are also discussed.

本文用两层准地转模式,初步考虑海陆的差异,不同尺度波动之间的非线性作用,将场用富氏级数展开,得到一组非线性常微分方程组。讨论了中期过程的演变。 得到近于纬向的环流向经向环流转变。极地高压形成等结果。而这类大型过程的转变主要是由于超长波的发展。还讨论了动力、热力因子的作用。

The response of the Northern Hemispheric multi-level model atmosphere to forcing by stationary heat sources in winter is investigated by means of a steady and quasi-geostrophic model in a spherical coordinate system.The results computed from this model show that the amplitude of stationary planetary waves responding to forcing is larger by stationary heat sources at high latitudes than by those at middle latitudes. The results also show that the larger the meridional width of stationary heat sources,...

The response of the Northern Hemispheric multi-level model atmosphere to forcing by stationary heat sources in winter is investigated by means of a steady and quasi-geostrophic model in a spherical coordinate system.The results computed from this model show that the amplitude of stationary planetary waves responding to forcing is larger by stationary heat sources at high latitudes than by those at middle latitudes. The results also show that the larger the meridional width of stationary heat sources, the larger the amplitude of stationary planetary waves responding to forcing is.

本文应用一个定常、准地转34层球坐标模式来讨论冬季北半球多层模式大气对定常热源强迫的响应. 计算结果表明:在冬季位于高纬度的定常热源强迫所产生的定常行星波的振幅要比位于中纬度的定常热源强迫所产生的定常行星波的振幅要大.计算结果也表明了热源的南北宽度愈宽,其强迫所产生的定常行星波的振幅愈大.

 
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