干旱区生态环境知识资源中心

Using the Yinchuan new generation radar volume scan data of severe convective precipitation in 20042005, composite reflectivity images in polar coordinate were projected into the coordinate of x-y. 51 cases were studied with gray level co-occurrence matrix and the parameters of angle second moment, contrast., correlation, entropy and inverse difference moment Results show that, there are obvious differences of texture between the remote sense images of precipitation in Ningxia and south China. In the radar images of severe convective precipitation in climate and region in north-mid Part of Ningxia, the texture is not as distinct as in south China, and the definition is not very clear, the texture is weaker and thinner, the images are smoother and stable than that of south China, the features indicate that the clouds of severe convective precipitation in the climate and region in north-mid part of Ningxia are homogeneous.