动量通量

太平洋海&气水平动量通量的时空分布特征

The features of the spatial-temporal distribution on the . air-sea momentum flux over the Pacific

尽管这样对潜热、CO2、动量通量的测量基本通过测试，可以适用于基础研究，但是经常发现特定的风矢量违背基本假设条件。

Despite this fact , measurements of latent heat - , CO_ 2 - and momentum flux in general fulfill the quality test criteria to an extend that the results can be regarded as suitable for fundamental research , whereby usually certain wind sectors have been found violating basic assumptions .

在一维交错网格上基于SALE算法的速度重映策略，提出了3种动量通量的改进算法：①采用迎风斜率加修补的SUR方法；

Based on the velocity remapping strategy of the SALE algorithm , three methods are proposed to improve the accuracy and monotonicity of momentum flux calculation on a 1D staggered grid : the SUR method which employs the upwind-type slope and a repairing procedure ;

动量通量和摩擦速度随风速增加。

The momentum flux and friction velocity increase with speed .

动量通量同样还受到全日和半日潮汐波的调制，在夏季其反相关性较弱。

Momentum fluxes are also strongly modulated by diurnal and semi-diurnal tides .

沙尘天气时湍流动量通量与晴天时明显不同。

The momentum fluxes are obviously different in dust and sand weather from clear day .

动量通量与背景风存在很强的反相关性，无论是随季节的变化还是当地时的变化。

Momentum fluxes are strongly anti-correlated with background wind on both seasonal and nocturnal time scale .

森林冠层内耗散系数和动量通量随大气稳定度有明显变化。

Variations of the dissipation coefficient and momentum flux with atmospheric stability are found within forest CL.

地表热力非均匀性对区域平均风速和动量通量分布无明显影响，但边界层内的局地流动性状和湍流动量输送情况有系统性的改变。

However , local flow pattern and property of turbulent momentum transfer changed systematically in heterogeneous conditions .

纬向动量通量表现出与能量相似的时间变化趋势。

Zonal momentum fluxes exhibit a similar temporal behavior to that seen in the gravity wave energy density .

计算结果表明：最大向北的动量通量与热量通量位于平流层。

The computed results show that the poleward momentum and heat flux in the stratosphere has a maximum , respectively .

冠层下层的动量通量和耗散系数分别与上层的量有好的正相关；

The momentum flux and dissipation coefficient in the lower CL are positive correlated obviously with the corresponding variables in the upper CL.

结果表明，冠层上动量通量向下传输，而冠层内大多向上传输；

The results show that above the canopy kinetic momentum was transported downwards , while within the canopy it was transported upwards .

有助于对登陆台风的风场和湍流动量通量时空分布及机理的进一步认识。

It will be of great assistance in understanding of wind fields and space-time distributions and change mechanism of turbulence fluxes for a landing TC .

冬季北半球地形与定常热源强迫所产生的定常行星波及其动量通量、热量通量的计算

The computation of the momentum and heat fluxes due to stationary planetary waves responding to forcing by the northern hemispheric topography and stationary heat sources in winter

运用动量通量守恒定律，推导了轴心动压随靶距变化的关系式，并用试验作了验证。

The relationship that is obtained between the axial shaft line velocity and the forget distance by the law of conservation of momentum is verified with the experiment .

空气动力学粗糙度在众多的包含动量通量、显热通量和潜热通量的陆面-大气模式中，是一个非常重要的参数。

Aerodynamic roughness length is an important parameterization in " land surface atmosphere " models , including the momentum flux , sensible heat flux and latent heat flux .

结果表明，在冬季，包络地形方案对低纬地区的温度场和风场的预报略有改进，对总涡旋动量通量的模拟也较好。

Results show that the introduction of this scheme improves predictions of zonal temperature and wind fields in tropical troposphere , and simulates better the total eddy angular momentum flux .

雾体爆发性增强时，地面垂直动量通量和向下长波辐射通量密度增大，净辐射趋于零。

Both the vertical momentum and downward longwave radiation fluxes increased significantly at the beginning of the burst stage , and the net radiation fluxes approached zero at the same time .

讨论了两种辐射计算方案的结果差别对纬向环流变化的作用，以及研究经向涡动动量通量在东亚季风形成过程中的作用。

The influence is studied of the difference between the two radiation calculation scheme results on zonal circulation changes , together with the effect of meridional eddy momentum flux on the establishment of East Asian Monsoon .

变分法与涡动相关法给出的动量通量日变化都呈现多峰型，动量输送在白天和夜间较大，而日出和傍晚前后较小，与草原上风速的日变化特征相吻合。

The momentum fluxes by VTand EC both have many apices , and smaller at dawn and dusk than the rest of a day , whichacts in accord with the diurnal variation of the wind speed in grassland .

在中高风速下，再计算动量通量的相对误差较小，其他情况下再计算动量、感热和潜热通量的相对误差最高能达到50%左右；

The relative error of recalculated momentum flux is smaller in the middle-high wind speed range , but the largest relative error of recalculated momentum , sensible and latent heat fluxes are about 50 % in the other conditions .

海面飞沫热通量能显著地增强台风强度，增大海面风速和海面动量通量以及海面波高；同时海面飞沫热通量直接影响着海气界面的总热量和水汽通量，显著地增大海气界面的潜热和水汽通量。

Incorporating sea spray heat flux substantially strengthens the typhoon system , and increases surface wind and wave height . It also influences air-sea heat fluxes directly , and significantly increases the air-sea latent heat and water vapor fluxes .

本文应用3维EOF方法对19501979年间太平洋海气水平动量通量进行了分析，分别得到了空间分布、季节变化及年际变化结构特征。

In this paper , a three dimensional EOF technique is applied to analyse the space-time structure of the air-sea momentum flux over the Pacific in the period of 1950-1979 . The characters of the spatial distribution , and the seasonal and interannual variations are obtained .

采样速率为每秒1次和11次，数字量记录。计算了湍流动量通量和热通量的日变化，以及湍流风速的统计量和功率谱。

The turbulent fluxes of momentum and heat , and statistics and spectra of wind speed fluctuations were calculated from the digital data sampled at rate of both 1s ~ ( - 1 ) and 11s ~ ( - 1 ) , using eddy correlation and FFT method .

结果表明，西风爆发过程与其他天气过程相比，无论是大气向海洋输送的动量通量，还是海洋向大气输送的感热通量和潜热通量，其值都是最大的。

The results show that both the momentum flux transferred from the atmosphere to the-ocean and the sensible heat flux and the latent neat flux transferred from the ocean to the atmosphere for the westerly burst are larger than that for the stationary weather and the strong convection weather .

本文分析了用IAP两层大气环流模式模拟的海表动量和热量通量，并将其同Han等和Esbensen等的气候资料比较。

The sea surface heat and momentum fluxes simulated by using the IAP Two-Level Atmospheric General Circulation Model are analyzed in this paper .

海表动量和热量通量的数值模拟

Numerical Simulation of Sea Surface Momentum and Heat Fluxes

湍流通量在干湿期转换中有突变现象，干期的动量和热量通量均大于湿期，热源强度以感热为主，占80%。

The sensible heat dominates in the dry period , making up 80 % of the total heating ;

根据这些风、温高频测量值，用几种不同的计算方法计算了湍流能量和动量、热量通量。

Three sorts of different methods for calculating the turbulent energy and the turbulent fluxes of heat and momentum are introduced .