涡度

降水方程中，因子辐散风选中的最多，其次为Q矢量散度和涡度。

In precipitation forecasting equations , the first chosen factor is the divergence wind , and then the divergence and vorticity of Q vector .

我国南方MCC的涡度、水汽和热量收支平衡

The Vorticity , Heat , Moisture Budget Evolution of MCC over South China

基于涡度相关技术估算植被/大气间净CO2交换量中的不确定性

Uncertainties in long-term studies of net ecosystem co_2 exchange with the atmosphere based on eddy covariance technique on quantity

利用涡度相关法对黄土塬区小麦地CO2通量季节变化进行了研究。

The seasonal variation of CO2 flux in a winter wheat field of the Loess Plateau was studied using an eddy covariance method .

基于涡度相关技术，于2004年生长季对三江平原稻田CO2通量进行了观测。

The CO2 flux of the rice field of Sanjiang plain were measured during the growing season in2004 , based on eddy correlation system .

本文还将该四阶半离散中心迎风格式与涡度-流函数方法相结合，有效地求解了二维不可压Euler方程组和Navier-Stokes方程组。

Combining the semi-discrete central-upwind scheme with the Vorticity-Stream method , 2D incompressible Euler and Navier-Stokes equations are solved effectively .

我们针对这一缺陷，提出了专门用于转向异常路径的一个预测方案，在涡度场EOF展开的基础上，结合逐步判别，建立一个回归模型。

Aiming at the limitation , a predicting scheme was developed especially for singularity recurvature track .

并且用该全型涡度方程严格证明了倾斜涡度发展（SVD）理论。

Based upon this equation , the theory of Slantwise Vorticity Development ( SVD ) proposed by Wu et al .

结果表明，（20~30°N，115~125°E）区域内500hPa负涡度的增加对应着西太平洋副热带高压的西伸过程。

Results indicate that the increase of the negative vorticity in key area agrees with the westward extension of western Pacific Subtropical High .

利用全型垂直涡度倾向方程，讨论了空间非均匀非绝热加热（Q）对副热带高压形态变异的影响。

Based upon the complete form of vertical vorticity tendency equation , the effect of spatially nonuniform heating on the formation and variation of subtropical high is discussed in this study .

涡度和散度场的客观分析清楚地展示出MCC的中－α尺度环流。

The objective analysis revealed distinctly the meso α scale circulations associated with the MCC on the vorticity and divergence fields .

以华北平原冬小麦农田尺度为研究对象，采用涡度相关技术，研究冬小麦灌浆期瞬态CO2通量日变化特征及其与农田热量平衡各分量的关系。

The diurnal variation of instantaneous carbon dioxide flux and the relationship between it and components of farmland energy balance during grain filling stage of winter wheat by eddy correlation technique were studied .

向北的扰动涡度输送在45°N上空达极大值，因此它对中纬度西风和纬向平均急流的维持起着重要作用。

The northward vorticity transfer by the large-scale eddies reaches its maximum value over 45 ° N , so that it may play an important role both for the maintenance of the mean zonal westerlies and its jet in the middle latitude .

同时，在MCC转化为MCSs时，x方向的水平涡度逐渐发展成在雨区南部正，北部负的配置，这种配置有利于上升运动的发展和MCSs的形成。

Moreover , the horizontal vorticity of x-direction gradually develops into the configuration that is positive in southern rain area and minus in the north .

本次研究中利用石英C轴组构与主应变比值的方法以及石英C轴组构与斜列颗粒形态的方法，测量了郯庐断裂带南段晚期韧性剪切带的运动学涡度。

This paper used two approaches such as quartz C-axis fabrics and strain ratios , oblique grain shapes and quartz C-axis fabrics to measure kinematic vorticity numbers of the late ductile shear zone in southern segment of the Tancheng & Lujiang ( Tan-Lu ) fault zone .

推导了同心球间旋转流动的Navier-Stokes方程的流函数-涡度形式，给出了静态奇异点的条件，并计算出解分支。

Velocity-stream function form of the Navier-stokes equations for the flow between two concentric rotating spheres is deduced , and detection conditions of singular point and solution branches are given .

结果表明：暴雨产生在θe线陡立密集区附近，θe线陡立密集区附近对流稳定度较小，有利于湿斜压涡度发展；

The results show that the rainstorm occurred in the neighbourhood of the stiff and dense section of the moist isentropes , where the convective degree of stability is so small that it is beneficial to the development of moist baroclinic vorticity .

而慢过程在零级近似下是地转风，流场具有水平无辐散性质，在一级近似下是类似Rossby波的慢波，运动满足位涡度守恒的条件。

Under the first approximation , there exist the slower waves as Rossby waves and their motions satisfy the condition similar to that of potential vorticity conservation .

将涡度方程及绝热方程分离变量，化成非线性常微分方程组，以Runge-Kutta法在电子计算机上进行数值积分。

The vorticity equation and adiabatic equation are converted into a set of nonlinear ordinary differential equations which have been integrated on the electronic computer by using the Runge-Kutta method .

结果表明，两个时期的动量场存在明显差异，而水热场差异不大，Q1和Q2以及涡度收支也存在明显差异。

The results showed that significant differences were found in the momentum field , Q1 and Q2 , as well as the vorticity budget in the two periods . However not much difference was observed in the heat and moisture fields .

用一个带有地形项的f平面准地转正压涡度方程，实施5组积分时间长度为72h的试验，研究了中尺度地形对涡旋自组织的影响。

In order to investigate the effect of meso-scale topography on vortex self-organization , five numerical experiments , whose integral time is 72 hours , are performed using a f-plane quasi-geostrophic barotropic vorticity equation model with a topographic term .

MCC在低空急流中心前方的风速梯度区中形成并发展；MCC形成阶段，中层出现暖中心并且气旋性涡度增大，辐合辐散运动随高度交替出现，量级相当，上升运动的层次较厚。

The warm core occurs , the cyclone vorticity increases and the divergence alternates with height in the middle-level at the forming stage of MCC , and the levels of ascending motion are thick .

结果表明：（1）LTC在陆上长久维持过程中，其低层正涡度衰减缓慢并保持一定强度。STC登陆后正涡度减弱较快。

The results have shown that ( 1 ) LTC would keep its positive vorticity a stronger value in lower level and decay slowly while STC would decrease quickly after landfall .

本文首先设计了一个极坐标系正压涡度方程的半谱模式、一个准地转格点模式对涡旋Rossby波传播和热带气旋强度变化进行了较为系统的研究。

Firstly , this paper designs a polar coordinate barotropic vorticity equation semi-spectral model and a quasi-geostrophic grid model in order to research the propagation of vortex Rossby waves and tropical cyclone intensity change entirely .

从含Ekman摩擦的二层非线性准地转斜压涡度方程出发，提出了一种新的广义能量作为Lyapunov函数，导出了非线性斜压亚临界稳定性判据。

Starting from a two-layer nonlinear quasi-geostrophic baroclinic vorticity equation containing Ekman friction , a new generalized energy is proposed to act as Lyapunov function and thus a new criterion of nonlinear baroclinic subcritical instability containing two inequalities is obtained .

但在经向超长波时，则涡度方程中存在辐散项，这一结果与Matsuno得到的在热带存在Rossby波和惯性-重力波混合的情况是一致的。

While for meridional ultra-long wave the vorticity equation has a divergence term . This result agrees with that of Matsuno who obtained the mixed Rossby-gravity wave in the dry tropical atmosphere .

此外，移出高原且方向向东的MCSs主要决定于等压面高度、散度、涡度和假相当位温这4个物理量值。

Further more , the eastward-moving MCSs that has already moved out of the Plateau mainly depends on four physical values of constant pressure surface height , divergent , vortex and the potential pseudo-equivalent temperature .

500hPa层持续的高空正涡度平流以及700hPa低层暖平流非常有利于低涡的维持；

The maintain positive vorticity advection in the middle troposphere and the warm advection in the lower troposphere take advantage of the vortex development and maintain ;

运用非静力平衡中尺度模式WRF（V2.03），对2004年14号台风云娜在登陆后产生强降水的过程进行了42h模拟，并对螺旋云雨带的涡度场结构进行了分析。

Using the non-hydrostatic model WRF ( V2.03 ), we simulated the process of heavy rain and analyzed the structure of typhoon RANANUIM ( 2004 ) 's vorticity field .

台风螺旋云雨带的形成与维持，可以用涡旋Rossby波理论来解释：可以通过改变局地相对涡度径向梯度分布，从而沿台风径向激发出局地涡旋Rossby波。

The spiral cloud and rain band of typhoon , whose origination and maintain can be explained with the vortex Rossby-wave theory and can produce " local vortex Rossby-wave " through changing gradient distribution pattern of local relative vorticity along outward direction of typhoon .