AgI-seeding should be done before the activation of most ice nuclei start, so as to enhance rainfall through increasing ice crystals content, and deleting super-cooled cloud water. 結果表明，該地區秋季對流云降水主要為冷云降水，冰晶是霰產(chǎn)生的主要來(lái)源，冰霰自動(dòng)轉化是霰產(chǎn)生的最主要方式，冰晶與霰的碰并又促進(jìn)了霰的進(jìn)一步增長(cháng)，霰是云中過(guò)冷水消耗的主要因素。
Ice particles collide with super-cooled water to form graupel and hail particles, and the hail particles grow between the ascending and sinking currents. 冰晶碰并過(guò)冷水形成霰和冰雹，冰雹粒子在氣流循環(huán)處生長(cháng)。
