地转风

地转风原则的判定方法及其在天气分析中的应用

Judgement of Geostrophic Wind Principle and Its Application In Weather Analysis

从二维地转风到三维涡旋运动

From 2-D geostrophic wind to 3-D vortex motions

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 .

用6个环流指数中的地转风V和大尺度平均温度t可以建立其与温度距平之间的一个统计模式，利用此模式，能解释哈尔滨1951&2002年温度变化方差的77.3%。

Moreover , a successful statistical model can be established with only one of the six indices and large-scale mean temperature . Using the model , 77.3 % of the total variance in the temperature anomaly between 1951 and 2002 can be reconstructed .

中尺度降水区分别与非地转风涡度极值密集区相对应。

Maximum areas of ageostrophic vorticity of upper air jet correspond to mesoscale terrain .

地转风适应过程的数值试验研究

A numerical simulation of the geostrophic adjustment process

连云港外海东北大风与地转风的关系

The relationship between the Northeast strong wind and the geostrophic wind over the sea off Lianyungang harbour

考虑地面的降温率是时间的函数。地转风为常数。

The surface temperature is considered to be a function of time , while the geostrophic wind is held constant .

非地转风在有限区动能的收支中也起着十分重要的作用。

The ageostrophic wind plays a very important part in the kinetic energy budget in limited areas in East Asia .

利用此模式我们还考察了对流卷的形成对地表热通量和地转风切变值的大小依赖关系。

We also investigated how the rolls relate to the surface heat fluxes and the magnitude of the geostrophic wind shear .

全球纬向平均的简化经向运动方程精度检验结果证明中高纬地区以地转风平衡为主，低纬以该简化关系为主。

For the case of global-zonal average , the results confirm that geotropic approximation is applicable in higher latitudes and the gradient balance approximation in lower latitudes .

热力场与螺旋度有内在联系，地面相对螺旋度可视为地转风或实际风引起温度平流的一个量度。

There exists inherent relationship between atmospheric temperature and helicity , and the surface relative helicity can be used to measure the temperature advection caused by geostrophic flow .

通过对结果的分析，发现用此方法得到的诊断风场比地转风场更接近实际，特别是急流区。

The calculated results show that the calculated diagnostic wind fields are more similar to climatology than the geostrophic wind fields , especially , in the jet stream area .

例如375毫巴上单纯非地转风的流场的反气旋涡旋，适应后可建立起对流层暖性、平流层是冷性的高压系统。

For example , a non-geostrophic vortex in wind field on the 375 mb level can result in a high with the warm center in the troposphere and the cold center in the stratosphere .

结果表明，无论冬夏，用海平面气压场诊断出的海面风场与观测到的海面风场很接近，而与地转风场有很明显的区别。

Results show that the diagnosed sea surface winds from the sea surface pressure fields are very close to the observations both in winter and in summer , and they are quite different from the geostrophic winds .

通过计算变形向量、锋生函数及非地转风的分布，发现在锋生函数中变形项所起作用比散度项和倾斜项要早、要大，对台风温带变性有重要的作用。

After calculation of every items distribution of frontogenesis function , it was found that in the early stage of raining the effects of transfiguration item on frontogenesis function was earlier , larger than the others , played important role to typhoon 's transition .

概述惯性圆，地转，梯度风，旋转风。

Recapped inertial circles , geostrophy , gradient wind , and cyclostrophic wind .

本文指出次天气尺度低空急流的超地转特征主要是由变压风叠加在地转风场上所致。

The article presents that the supergeostrophic wind of subsynoptic scale low-level jet stream is mainly caused by the isallobaric wind superimposing on the geostrophic wind field .