In order to take prevention measures of erosion timely,analysis on the temporal characteristics of rainfall erosivity of Datong City is conducted by using Richardson rainfall erosivity method,climate tendency coefficient,precipitation concentration index and cumulative percent analysis method.

Forecast system for spring sandstorm climate trend in Ningxia;

Based on daily maximum and minimum temperature data of 234 stations in China during the period of 1955—2005,the spatial and temporal features of trends of annual and seasonal extreme temperatures are studied by using modern statistical diagnostic methods such as the computation of trend coefficients.

WT5BZ]The trends of temperature and precipitation in the north of the Northeast China are studied by using the trend coefficient based on the 1951～1999 data over 6 stations in Heilongjiang Province.

The causes that total cloud amount from the two datasets(ISCCP D2 product and ground observation) over China have difference,and the quantitative results on spatial-distribution difference of total cloud amount and the trend of climate change,are helpful to further study on the cloud amount,radiation balance,and the promotion of climate models\' performances.