查询词典 geostrophic

In order to use numerical predictive products effectively, to enhance the ability of explaining middle-scale numerical predictive (MM5) model, and improe short-term disaster weather forecast, a diagnosis of a heavy snow-storm from Jan. 18 to Jan. 19, 2006 was made with the non-geostrophic wet Q-vector theory.

为了有效利用数值预报产品，提高中尺度数值预报模式MM5的释用能力，做好灾害性天气的预报，引用非地转湿Q矢量理论对2006年1月18-19日宁夏北部一次强降雪过程进行了诊断分析。

It is shown from this thesis that flow fields on synoptic maps can be decomposed into rotation and deformation fields. Geostrophic non-frictional cyclone and anticyclone vortex patterns are closed circulations around the center point, streamlines of frictional cyclone and anticyclone patterns have spiral forms around the focus point. Saddle fields have four vortex centers (two cyclones and two anticyclones) and a saddle point. Blocking high pressure and cut-off low pressure patterns consist of a vortex center and a saddle point.

本文说明了天气图上的流场可以分解为旋转场和变形场：地转无摩擦的气旋、反气旋的涡旋型式是围绕中心点的闭合环流；考虑摩擦的气旋、反气旋的流型是围绕焦点的螺旋型式；鞍型场有4个涡旋中心点（2个气旋和2个反气旋）与1个鞍点；阻塞高压和切断低压由1个涡旋中心点与1个鞍点组成。

Therefore, an un-derstanding of the maintenance of the stationary waves is a prereq-uisite for a thorough understanding of the low frequency transients.The Eliassen-Palm cross-section and the three-dimensional waveactivity flux, which was derived by Plumb (1985) for the linear quasi-geostrophic stationary waves in a zonal flow, are ...

分析结果表明，Plumb通量和EP剖面图，不仅可以用来诊断波作用在三维空间的传播、波动与纬向平均气流之间的相互作用，而且也可以用来诊断非线性作用的显著性，在利用它们对于观测资料进行诊断分析时，应当充分注意到非线性作用的影响。

This paper presents the geostrophic and gradient wind appropriate calculation formulas used on facsimile surface weather chart, puts forward a new method of sea surface wind estimating from the theoretical wind speed by establishment of the wind speed correction database. Also the application characteristics and advantages of the gradient wind calculation method on severe weather system are discussed.

为了深入探讨海面风估算方法，给出了传真地面天气图上地转风、梯度风的近似计算公式，介绍了用传真图实时计算地转风与梯度风的实现方法，提出了通过建立风速订正值库由风速理论值实时估测平均海面风速的一种新方法，并深入探讨了梯度风测风方法在强天气测风中的应用特点和优势。

The introduction of nonlinear advection into the model weakens the intensifying of maximum tangential wind with relative to the initial disturbance azimuthally wave numbers and intensity .2 An f-plane quasi-geostrophic barotropic vorticity equation model of high resolution is designed in this paper in order to investigate the characters of vorticity propagation and the effect of nonlinearity on the propagation within a typhoon circulation, wherein two mesoscale vortices coexist at different radial positions.

设计了一个高分辨率的f平面的准地转正压涡度方程模式，用以研究两个径向距离不等的中尺度涡旋共存条件下，台风环流内涡量传播的特征，以及非线性在此传播过程中的作用。10组试验的结果指出：与单涡条件相比，涡量内传的强度显著加强，涡量滞留在台风内区的时间加长，内区局域最大风速增大的现象更加清楚。

In chapter 3, the heat induced semi-geostrophic motion equations on β-plane, proper heating parameterizational schedules and standard atmosphere substraction technique are introduced to establish a model.

第三章是本文的核心部分。

First we showed that high latitude thermosphere's response to heat sources is different from that to momentumn sources, which can be generally explained by geostrophic adjustment, with the main energy of the momentumn sources remained in the local region, and the main emergy of the heat sources transported to mid and low latitude.

首先把动力气象学中大气适应的方法应用到极区热层大气，分析了热层大气对动量源和热源的不同响应机制，认为极光区加热源是引起中低纬热层大气扰动的主要因素。

Evensen G, van Leeuwen PJ (1996) Assimilation of Geosat Altimeter Data for the Agulhas Current using the Ensemble Kalman Filter with a Quasi-Geostrophic Model.

这篇文章开辟了把集合Kalman滤波真正用到数据同化的新纪元。主要是利用概论上的理论和一些简单的理想数值试验来证明了集合Kalman滤波可能性和可行性。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。