general rainfall
1.The results of numerical experiment are consistent with statistic analysis results. The SST anomaly of the equatorial eastern Pacific and west wind drift region both have influence on the general circulation and summer rainfall in North China, and the influence is nonlinear, which is not only manifested through the intensity change of anomaly of general circulation and summer rainfall in North China, but also through the spatial distribution pattern of the anomaly.
2.Baced on the general circulation background, synoptic-climatological cause and external forcing predictor of rainfall of Yunnan in May, the composite model of the long-term weather process of Yunnan in May for rainfall and the optimum subset regression model of rank statistics applied for dryness and wetness forecasting are presented.
4.The distribution of LRGR summer mean rainfall was determined by the obstructing effect and two stronger ascending airflow that come from Bengal Bay and South Sea and converge around corresponding windward slopes; the general circulation distribution in meridional section is equal, which showed the passing-effect of LRGR.
5.By analysis of the path, the gale disaster, and the general circulation of typhoon Inbudo, it shows that ① the subtropical high moves westwards and leads the typhoon to move westwards for a stable period, ② the gale disaster is due to the rise of the pressure gradient between the subtropical high and the typhoon, ③ the southwest jetstream in tropic brought abundant vapor and instability energy to Guangxi is the main reason of the heavy rainfall.
6.The results indicated that the REE tracer technology has high precision to quantify the spatial-temporal process of soil erosion; In earlier rainfall course, the development degree of sheet and nil erosion was general equation; Otherwise in the following course, the rill erosion was dominant in the total erosion, its average erosion acceleration and the average erosion rate was 15 and 9 times of sheet erosion, respectively; In the end of experiment, the rill erosion took up 90% of total erosion amount; The section of slope bottom occupying about 1/3 slope area was active erosion segment in this experiment.
