查询词典 frontogenesis

P R Quasi-geostrophic frontogenesis over topography Journal of the Atmospheric Sciences , 20,null

吴国雄%蔡雅萍%唐晓菁湿位涡和倾斜涡度发展气象学报， 1995，4

In the research and analysis of this Meiyu front system, several new views are suggested which are different from previous results, for example, the problems concerning the cut-off of high potential vorticity region, the formation mechanism of Jianghuai shear lines, the frontogenesis mechanism of Meiyu front in different positions, the affection to potential vorticity coming from air mass change.

7在对梅雨锋进行研究和分析过程中，对以前一些科学家所做的某些工作和结论做了进一步分析，提出了几点新见解。如高位涡区南下切断问题、江淮切变线形成机制问题、梅雨锋不同位置的锋生机制问题、质量变化对位涡的影响等。

The variations of fronts in the southeast Indian Ocean are analyzed in eddy kinetic energy and thermohaline properties, and the frontogenesis of oceanic fronts is also discussed preliminarily.

极锋区的东向输送流幅宽达4.3个纬度，大于SAF的输送，其间有多个速度峰值，反映了该断面的PF2和PF1具有较大的南北摆动幅度，甚至可能分裂为多个锋。

The strong westerly jet in the upper troposphere is linked to the Mongolia cyclone and frontogenesis at low level which can cause strong wind and further provides the dynamic factor for the increased DWF in Beijing.

春季对流层高层的东亚西风急流增强能使低空的蒙古气旋加强和锋生，从而引起地面大风，为沙尘天气频次的增加提供动力条件。

This indicates that the importance of surface friction on the structure of front in boundary layer. Probably this is the first time that the structure similar to the gravity current is obtained in deformation frontogenesis model. On the problem of moist physical processes on the frontal rainbands, by using the explicit cloud physical scheme in cloud model the interactions of cloud scale processes with the frontogenetical circulation are studied emphatically.

在湿物理过程对锋面的影响以及锋面雨带产生问题上，利用云模式的显式云物理方案处理湿物理过程，在考虑到大尺度气流影响的情况下，着重研究中尺度和云尺度过程与锋生环流的相互作用，讨论了变形场锋生条件下锋面雨带的发生发展规律。

The development mechanisms of backflow precipitation are analyzed with the reasonable simulation results. The results show that dynamical frontogenesis plays a very important role in the development of backflow snowstorm. The frontogenetical secondary circulation directly causes the snowstorm.

在回流暴雪形成与发展的过程中，动力锋生机制发挥了重要作用；其产生的锋面次级环流是造成这次暴雪的主要原因；降水过程中，雨雪相态的转变与温度廊线有直接关系，随着降水由雨转为雪，雪水混合比增大迅速且其高度有所降低。

By 1999, computer systems and software had finally become sophisticated enough to allow for the ability to underlay on the same workstation satellite imagery, radar imagery, and model-derived fields such as atmospheric thickness and frontogenesis in combination with surface observations to make for the best possible surface analysis.

到1999年计算机系统和软件终于可以胜任以下工作：为工作站提供支持、卫星图象、雷达成象和诸如大气厚度和锋生作用的建模。

As the application of the intermediate models is concerned, the works applying the intermediate models to investigate the topographic boundary layer, frontogenesis and low-level frontal structures, and the boundary layer jet are summarized in this article. It is mainly focused on the dynamic characteristics of the Ekman layer and its effect on the low-level structure and circulation of the weather systems illustrated by the models. It is shown that the intermediate boundary-layer models have great potential in illustrating the low level structures of the weather and climate systems as they are coupled with the free atmospheric models.

对于这些Ekman边界层近似理论模型的进一步应用问题，主要回顾和总结了利用上述模型探讨地形边界层结构、大气锋生过程、低层锋面结构和环流以及边界层日变化、低空急流形成等动力学问题的研究，并对这些研究所揭示的Ekman层动力学特征及其对自由大气低层运动的影响进行了分析，结果表明，这些Ekman边界层近似模型可以较好地揭示大气边界层动力学特征，在大气边界层动力学及其与自由大气相互作用的研究上具有重要价值。

Bannon P R A Semi-geostrophic model of frontogenesis over topography Cont Atmos Phys , 1984,null

赵思雄 1998年7月长江流域特大洪水期间暴雨特征的分析研究气候与环境研究， 1998，4

This doctoral dissertation is composed of several parts: At beginning, the frontal structure, the effects of diabatic heating and orography, the dynamics of frontal circulation and the mesoscale systems associated with front are reviewed. Several problems based on the review are brought forward. First, at present, the semigeostrophic frontogenesis theory is the most appropriate basic framework for the general explanation of the frontogenetic process. However, the comparison between semigeostrophic theory and the observation have revealed some inconsistencies. The newly observational facts increase the inconsistencies.

本博士论文主要由如下几部分组成，首先对锋面结构、地形和非绝热加热对锋的影响、锋生环流及锋面附近中尺度系统动力学问题的历史与现状进行了综述，在此基础上提出需要进行研究的若干问题：(1)、半地转锋生理论直到今天仍是解释锋生过程的最合适的理论框架，但是通过与观测事实比较，人们发现半地转理论不能对许多锋面观测特征给出令人满意的回答，新的观测事实使问题更加突出，这就向人们提出：是什么原因导致半地转理论与实际观测的不符？

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐