论文部分内容阅读
本文介绍了美国南、北达科他州人工影响天气研究的概况。１９７６年以来，北达科他州的人工影响云计划即为催化夏季对流云，以此达到抑制冰雹和增加降水量的双重目的，此项目是联邦政府与州的合作计划的一部分，同业务活动相配合；它包括物理和统计评估研究，以及数值云模拟研究。统计分析表明、预期的播撒目的基本得以实现；物理研究包括飞机和雷达观测，及加强示踪物实验，重点研究播撒剂的输送、扩散以及冰核活化过程；模式研究模拟播撒实验，以此指导这一过程和播撒效果的研究。本文对１９８９年北达科他雷暴计划这一着重于物理数值模拟研究的外场验给出了简要的介绍。
This article presents an overview of anthropogenic weather studies in South and North Dakota, USA. The artefacts of North Dakota since 1976 have catalyzed the summer convective cloud, which has the dual purpose of inhibiting hail and increasing precipitation as part of a federal government-state partnership that matches business activities ; It includes physical and statistical assessment studies, and numerical cloud simulation studies. The statistical analysis shows that the expected sowing purpose is basically achieved. The physical research includes the observation of aircraft and radar, and the strengthening of tracer experiments, focusing on the transmission, diffusion and activation of ice nuclei. The model study simulates the spreading experiment to guide This process and the study of spreading effects. This article gives a brief introduction to the 1989 North Dakota thunderstorm program, an outfield field that focuses on physical numerical simulation.