降水

Besides, another reason of the heavy rain may be that the kinetic energy perturbation is released concentrically in South China.

在对大气低频扰动动能的分析中也发现，华南前汛期降水伴随着低频扰动动能在该地区的集中释放。

In terms of the synoptic environment and precipitation characteristics, there were some common characteristics in these two cases. For instance, warm and moist air with the conditional instability atmosphere in the lower troposphere, it was associated with the highest equivalent potential temperature gradient and strong moisture contrast to below 700 hPa. The lower-level convergence was the major produced mechanism of MCS and the low-level southwesterly flow generated convective instability.

从综观环境条件与降水特徵显示，两个案共通特徵包括（1）低对流层属暖湿条件性不稳定大气，（2）最大相当位温梯度以及水气梯度分布於700 hPa以下，（3）低层辐合均为个案中MCS之重要激发机制，（4）有明显低层西南喷流，大气呈现对流性不稳定状态，（5）中层短波槽线的移入，以及（6）高层辐散分流场的存在，提供MCS发展的有利环境条件。

The results showed that extremely cold rain and snow weather of Sichuan Basin was related well to the variations of water vapor、 frontogenetic function of Yangtze River Basin. at the mid-lower level of the troposphere, especially at 700 hPa level, there was water vapor convergence exiting lastly in Sichuan Basin for long time. And the time of convergence of water vapor was congruous with of cold air in Sichuan basin, and provided the water vapor conditions for the occurrence of low-temperature disaster.

结果表明：四川盆地的低温雨雪天气与南来的水汽变化及长江流域的锋生作用有密切关系，在对流层中低层700hPa上，四川盆地长时间存在稳定的水汽辐合区，水汽辐合的时段基本与盆地冷空气活动时间段一致，这为低温降水的发生提供了水汽条件。

Using the technique of ridge film mulching and furrow seeding in western Liaoning can improve the utilization ratio of natural precipitation to prohibit soil water evaporation, conserver soil water and increase yield of corn.

在辽西风沙半干旱雨养农业区采用垄膜沟种技术，可有效提高自然降水利用率，达到保水增墒、减少无效蒸发，提高玉米产量的作用。

Using the technique of ridge film mulching and furrow seeding in western Liaoning can improve the Utilization Ratio of natural precipitation to prohibit soil water evaporation, conserver soil moisture and increase yield of corn.

在辽西风沙半干旱雨养农业区采用垄膜沟种种植技术，可有效提高自然降水利用率，达到保水增墒、减少无效蒸发，提高玉米产量的作用。

This paper makes an analysis of the Doppler speed charts of clear weather and the echoes of large-area precipitation. It also singles out the Doppler speed charts of typical wind fields. In addition, this paper analyzes Doppler radars detecting process of the strong convection current weather system. It also conducts a thorough analysis of Doppler echo features of some hazardous weather, such as cell storm and downward storms. Based on this research and analysis, the paper reaches some important conclusions concerning the detecting methods using Doppler radar and the analysis of the information gathered by Doppler radar.

本文通过分析晴空和大面积降水回波的多普勒速度图像，归纳总结出了典型风场的多普勒速度图象，并着重分析了多普勒雷达对严重危害飞行安全的强对流天气系统的探测，特别是深入分析了超级单体风暴、下击暴流等灾害性天气的多普勒回波特征，得出了多普勒雷达对灾害性天气进行探测的方法、雷达资料分析应用等方面许多有益的结论。

The effect of the relative humidity, especially in the low level, is the most significant to simulation of the strong convective systems.

初始湿度场的改变，尤其是低层湿度场的改变对降水和强对流系统的发生、发展的模拟影响最大。

The minimum potential region of water vapor transport vector correspond to intense heavy rainfall region, and the water vapor convergence of the heavy rain region is supplied by the hemisphere scale water vapor transport, indicating that even for a regional severe flood it must gain water vapor supply from very extensive regions.

水汽通量的势函数极小值区对应强降水区，并且暴雨区的水汽辐合是由半球尺度的水汽输送造成，这表明，即使对于该年背景的区域性大暴雨/洪水，它也必须从极大范围地区获得水汽供应。1999年水汽辐合的中心位置较1998年偏东偏南，这使得1999年降水较1998年偏南。

Stationary and nonstationsary coupled oscillation regions are located over the western and eastern Pacific, respectively Thus, the interdacadal variations for intensity and period of these coupled interannual oscillations are closely related to PDO

西太平洋地区海温的耦合振荡作用区域是时间稳定的，而东太平洋地区海温的耦合振荡作用区域存在时变性因此PDO对夏季江淮地区降水和太平洋海温年际藕合振荡的强度和周期的年代际变化有重要影响。

During the PDO warm phase, however, there is a significant tropospheric biennial oscillation for the coupled interannual oscillations over these regions In addition , it seems to have a stronger correlation with the SST of the tropical eastern Pacific summer.

结果表明PDO冷暖位相中夏季江淮地区降水量与太平洋海温年际耦合振荡周期和强度均存在显著差异PDO冷位相中，夏季江淮地区降水与前期冬季西南太平洋和同期夏季黑潮区海温在7~8a时间尺度上的耦合最显著，而在PDO暖位相中，与这些地区海温呈现极显著的准2a耦合振荡，并且与同期夏季赤道东太平洋地区海温的准2a耦合振荡也迅速加强。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。