暴雨

Through analysis of potential vorticity in isobaric surface field, in high-troposphere a positive potential vorticity disturbance before rainstorm generation;positive potential vorticity disturbance in high-troposphere downward, form one vertical disturbance column, now corresponding precipitation develop stage;When near ground arises negative potential vorticity disturbance, precipitation also weaken.

通过对等压面的位涡分析，发现在暴雨发生发展时，在对流层高层有正位涡向下扰动，在暴雨的发展鼎盛阶段，从对流层中高层到地面形成一个垂直扰动柱；位涡柱对地面气旋的发展有较好的指示性，位涡柱形成时刻前后降水达到最强；当近地面出现负的位涡扰动时，降水随之减弱。

Heavy rain occurred on May 8, necessitating the issuance of the first Rainstorm Red Warning and Landslip Warning in the year.

五月八日香港出现暴雨，天文台在当日发出了本年首次的红色暴雨警告和山泥倾泻警告。

It is also shown that one of the most important reasons of the heavy rain amplification is the cold air which spreads to south from midlatitude in the lower troposphere and transports into the typhoon low pressure. The study of PV on isentropic surface shows the active state of the midlatitude cold air. The tropopause folding, which means that high PV spreads downward from the upper troposphere or stratosphere, helps the releasing of potential instability energy and the development of rainstorm.

分析表明：对流层低层中高纬度冷空气扩散南下在台风低压环流区附近的"侵入"作用是此次特大暴雨过程的最重要的原因之一；等熵面位涡的分析进一步说明了中高纬地区冷空气的活动状况；对流层高层或平流层低层高位涡的下传有利于位势不稳定能量的释放，使得暴雨增幅。

Surveying several processes of rainfall, using the automatic hydrocone type ombrometer, analyzing the rainfall character in Dalian, drawing the frequency curve, especially, analyzing the time character of the storm, finding the time character of the storm, moreover, and the rainfall pattern is concerned.

利用安置在大连理工大学校园内的虹吸式自计雨量计，监测了数十场降雨过程，分析了大连市降雨的特点，计算并绘制出频率曲线，尤其对造成危害性较强的暴雨进行了时间特性的分析，结果得出了大连市暴雨的年、月、日以及短历时的时间特性，同时对雨型特点也进行了初步的分析。

The method of seeking for the statistical parameters of Pearson Ⅲ distribution with maximal likelihood methodis recommended to ascertain the urban storm intensity formula .

本文根据极大似然法推求统计参数的理论，提出在推求城市暴雨强度公式时可以采用极大似然法计算皮尔逊Ⅲ型分布统计参数的方法，经推求浙江省暴雨强度公式的实践检验，证明该方法是可行的

Such asymmetry might be caused by both the environmental wind field and the structure of Typhoon AERE itself,and was favorable to AERE at maintaining its southwestward movement.

本文分析了戴云山脉地形对台风暴雨的作用，以及德化、安溪、南安和永春一带台风暴雨多发的原因。2、登陆福建台风的不对称结构对其移动路径和所造成的天气有重要的影响。

Based on NCEP and other observational datasets, a severe heavy rainfall process occurred in the south of china during June 18-19,1998 was investigated. The first diagnostic analyses show that the strong rainfall are produced by vortex, shear line and upper and lower jets, stationary front. The condition of high energy, saturation, potential instability is propitious to the form and maintenance of this rainfall.

采用NCEP全球谱模式和常规观测资料对98年6月18～19日华南暴雨的影响系统及其可能机制进行了初步诊断分析，发现这次强降水过程是受低槽、低涡、切变线、高、低空急流和地面静止锋共同影响造成的，该地区维持高能、饱和、潜在不稳定的环境，有利于暴雨的产生。

Topographically, they are mainly along the south of the mountains, namely windward slopes and the areas in front of the mountains.

全省全年及前后汛期持续性暴雨次数的年代际变化相似；但从年际变化看，前汛期与全年发生持续性暴雨次数呈正相关关系，而后汛期与之则呈现一定的反相关关系。

In addition,the development of vertical motion also improved the cyclonic activity with γ scale,and would strengthen the intensity of precipitation.

同时，垂直运动的发展，促使中γ尺度气旋的活跃活动使得暴雨过程中的降水强度得到显著加强，也是暴雨强度增强的主要原因。

Torrential rain have been pounding much of Mexico for days, triggering mudslides in the western state of Michoacan that killed at least a dozen people, causing rivers to break their banks and setting off flooding in the capital and nearby states.

暴雨已连续在墨西哥下了几天，在西部墨西哥州发生的几次泥石流已杀死至少十二人，暴雨形成了河流摧毁他们的银行并且在首都附近的一些州还形成了洪水。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了