对流性降水

用积云参数及数值预报产品作对流性降水量模拟试验

An Experiment of Simulating Convective Precipitation with Cumulus Parameters and NWP Products

2004年大同市6月～8月对流性降水天气气候特点及预报

Climatic Feature and Forecast of Convective Precipitation during June-August 2004 in Datong

模拟结果表明：初始CCN对对流性降水影响较大。

The result indicates : initial CCN has great influence on convectional precipitation .

初始云滴浓度（CCN）对对流性降水作用的数值试验

The numerical test of initial cloud droplet concentration ( CCN ) effect on convectional precipitation

结果表明：不同对流性降水方案对不同月份、不同区域的降水模拟效果差别较大，采用Kuo方案和Grell方案时模拟的降水效果要好于BM方案；

The result shows that different convective schemes made large differences in the simulation of rainfall for different months and regions , the schemes of Kuo and Grell exhibited better performance than the scheme of BM ;

为提高雷达定量测量降水的精度，利用武汉CINRAD/SA雷达反射率数据，研究提出了对流性降水和层状云降水自动分类算法（ACSS）。

To increase the accuracy of radar rainfall estimation , an automatic convective / stratiform precipitation classification algorithm based on radar reflectivity data at the Wuhan radar station is proposed .

最后分别建立了对流性降水与台风降水的Z-I关系，以修正宁波夏季的降水估计值。

Finally , in order to improve the precipitation estimate in summer in Ningbo , the relationships between Z and I under convective and typhoon weather cases are established respectively .

介绍了多普勒雷达速度PPI产品图像定性识别方法，分析了与对流性降水云体有关的图像特征：①冷暖平流与大尺度辐合辐散运动相结合的零速度线；

The qualitative identification methods of Doppler radar velocity PPI pictures are introduced . The related image features of convective rainfall clouds are analyzed : ① the zero-velocity lines in the wind field related to large-scale convergence or divergence in combination with cold or warm advection ;

用雷达反射率作对流性降水和层状云降水自动分类

Automatic Convective / Stratiform Cloud Precipitation Classification Based on Radar Reflectivity

相对于地闪发生位置的对流性降水空间分布；

The spatial distribution of rainfall relative to the CG lightning location ;

初始冰核浓度对冷云对流性降水影响的数值试验

The numerical test of initial ice nuclei concentration effect on cold cloud convectional precipitation

对流层下部深厚不稳定层结是对流性降水所必须的热力层结条件；

The unstable stratification in the lower troposphere was a necessary thermal stratification condition for convective precipitation ;

结果表明：3个时次层状云降水在像素数量上及对总降水量的贡献上均比对流性降水大；

Results show that stratiformis precipitation occupied more area and contributed more rainfall to the total than convective precipitation at the three times .

本文利用二维滞弹性非静力平衡云模式〔1〕，通过改变初始冰核浓度，研究其对冷云对流性降水的影响。

A two-dimensional anelastic non-hydrostatic equilibrium cloud model has been used to simulate initial ice nuclei concentration affecting on cold cloud convective precipitation in this paper .

但是必须注意到，这种方法存在滤波发散的风险。并且在实际应用中，对流性降水产生的剧烈上升、下沉气流使得风场信息表现为非线性。

But it must be noted that , this approach has the risk of filter divergence and in the practical application , the updraft and downdraft producing from convective precipitation makes wind fields exhibiting nonlinear .

与此同时，暖湿的西南夏季风十分活跃，二者在中国南方地区产生强烈相互作用，结果在冷空气南侧形成大范围的对流性降水。

And meanwhile , the warm , humid southwest summer monsoon flow was also very active , the both met over the southern China , producing a vast area of the convective precipitation south of the cold air .

与实测的降水比较分析中可以看到，这种方法对提高估测区域性降水的精度都有效果；对于强对流性降水区域，只须用拟合法得到的地面反射率因子值估测地面降水即可。

Compared with gauges records , the proposed method shows its capability to improve the precision of precipitation estimation in a regional scale , however , for the case of intensive convective precipitation , only the LSM is applicable .

低层的气旋性环流和高层的反气旋性环流相配合，有利于形成低层辐合，高层辐散，使得气旋附近的上升气流得以维持和加强，从而为对流性降水提供了必要条件。

Low-level cyclone circulation with high-level anti cyclone circulation , is helpful to form low-level convergence and high-level divergence , and make the rising airflow nearby cyclone keep and strengthen so that have offered necessity condition for convection precipitation .

该个例雨水的形成主要是暖雨过程，冰相微物理过程对该对流性强降水过程的发展和演变有重要的促进作用。

The warm cloud process was the main developing process in the rain formation of this event , but the ice phase microphysical processes can greatly speed the rain formation .

对无亮带、反射率因子值较大而且越低仰角值越大的反射率因子垂直廓线的区域，对应地面上常有对流性强降水出现。

Intensive convective precipitation usually occurred over the regions that VPRs detected together with no bright band , the big reflectivity factors , and the bigger reflectivity factors , the lower elevation angles .

利用对地闪的观测估算对流性天气中的降水

Estimation of Rainfall in Convective Weather System by Using CG Lightning Data

地闪与对流性天气系统中降水关系的分析

The relationship between cloud to ground lightning and precipitation in the convective weather

从视热源和视水汽汇分析表明本次降水和、云对流活跃，以对流性降水为主。

Analysis of apparent heat source and apparent moist sink suggest that cumulus convection activities were active , and the convective rainfall dominated .