【摘要】 定西地区降水少气候干燥，夏秋雨水集中，与东部地区相比，有利人工增雨的云水资源相对不够丰富。但在某些特定环流条件下，定西地区具有形成自然降水的水汽，且降水云系的过冷水区相对较好，存在播云增雨的潜力。更多还原

【Abstract】 The cloud and water resouce used to nicrease precipitation artificially in DingXi is not rich because of dry climate,short and centralized preciptation,compared with easterm region.But there is steam that can form nature rainfall and a quite good supercooled water area of rainfall cloud system that exists potential of seeding cloud and increasing precipitation .更多还原