暖湿
1.Some results are concluded: (1) The climate bef ore 12 ka BP was colder and drier than that in Holocene;
4.genus of large brown long-billed wading birds found in warm swampy regions of the Western Hemisphere: courlan; limpkin.
5.Meanwhile, the compensatory eddy potential energy also enhances the upward motion of anomaly warm air that leads to cumulus convective activities and ensuing latent heat release. This builds a positive feedback process and results in the rapid growth of eddy kinetic energy and marine storm genesis.
6.The annual precipitation has a fluctuation change trend, the precipitation increases obviously in winter, the summer precipitation and the annual precipitation increase slowly, in each age the maximum precipitation in winter, summer, autumn and the maximum annual precipitation all appear at the beginning of 21st century in which the air temperature is warmer, the climate has a change trend from dry and warm to wet and warm.
7.This precipitation was fed by a low-level jet which carried warm, moist air near the surface from Texas and Oklahoma into the frontal region over Nebraska, South Dakota, and Iowa.
8.The southeast low-air jet accompanying the tropical cyclone transported plenty of heat and moisture for the storm, the low-level heating and wetting weakeed the stability of the air, and the weak cool air intruded from the low-level and stimulated the convection, thus leading to the heavy storm.
9.The converted greater eddy potential energy, along with the secondary one made by cumulus heating, is further transferred to eddy kinetic energy via upward motion of anomaly warm air, hence enhancing the growth of eddy kinetic energy.
10.It has been found that (1) the first rainfall is mainly caused by the cold air from west; (2) the convection systems over the Qinghai-Xizang Plateau have direct impact on the rainfall；(3) the moisture transport from the Indochina Peninsula through the south-western China provides a necessary condition for the first rainfall.
