莫拉克 作文

台风来之前出现雷暴主要是台前飑线.
不少台风外围都有台前飑线,在台风还没来之前就已经出现狂风暴雨,但这种狂风暴雨持续时间短,属于阵性.并伴有雷暴和冰雹.
元旦快乐!

小题1:C
小题2:A

Use NCEP1 ° * 1 ° material for "at" the typhoon rainfall process is a mild wet false potential vorticity (MPV). Results show that: the false quite a temperature isoline concentration near the development and heavy to scroll. Low-level MPV for typhoon heavy consumption of the advection forecast has good indication, rainfall center with negative MPV center has good corresponding relation, precipitation area commonly at MPV is negative, the confrontation areas. MPV1 low-rise negative, high-level for rainfall to occur, MPV1 concentration and regional rainfall has good corresponding relation, MPV1 from negative to positive transition, precipitation gradually. MPV2 from negative to positive correspond to the transition of precipitation, its positive range corresponding to the scope of rainfall, rainfall intensity values.