Localization Applications of 3D-GIS Artificial Weather Modification Operational Command System in Fuxin, China

Based on the command and management requirements of weather modification operations in Fuxin City, China, a new generation of three-dimensional operation command system platform for new artificial weather modification was developed and developed using modern communication network technology. The system uses integrated three-dimensional geographic information system (3D-GIS), global positioning system (GPS) positioning and virtual reality technology to calculate, analyze and process the new basic geographic information and weather modification information vector data, generate real-time weather modification operations and guide products in Fuxin area, and realize the impact on labor. The three-dimensional, comprehensive and effective management of basic weather information, early warning and forecast information, disaster prevention and mitigation information and other decision support information provides technical support for scientifically and effectively managing and directing weather modification operations.

Research on Thunderstorm Forecasting in Fuxin, China Based on Physical Diagnostic Parameters

Thunderstorms are very spectacular super-long-range discharge processes in the atmosphere, which can cause tremendous damage in an instant, often leading to casualties, resulting in damage to buildings, power supply systems, communication equipment and forest fires, causing major economic losses. In order to successfully predict thunderstorms, and many economic losses can be avoided. Using the observation data of two county stations in Yimeng County and Zhangwu County from June to August 2009-2015, 40 typical thunderstorm weather processes were selected, and 15 convective parameters related to thunderstorm activities were calculated. After statistical analysis, there are seven convective parameters with significant correlation with thunderstorm activity: convective affective potential energy (CAPE), 850 hPa specific humidity, 700 hPa specific humidity, 850 hPa false equivalent temperature, maximum rising speed, strong weather threat index (SWEAT) and zero degree height (ZH), and the correlation is greater than 0.3. We determined the forecast threshold of the above forecasting factors, calculated the fitting rate and conducted a test report. We used the pup product to establish a short-term proximity indicator for thunderstorm warning. Three products with combined reflectivity, vertical integrated liquid water content and echo top height were selected as warning indicators for thunderstorms. The above research results were used to forecast the thunderstorm weather from June to August in the year of 2015 and 2016. The forecast accuracy rate is more than 85%. In summary, the above methods have reference value and indicative significance for the forecast and warning of thunderstorm weather in Fuxin City, China.

Impact of Climate Warming and Drying on Crop Growing Season in Northwestern Liaoning

Based on the observation data of the average temperature and precipitation of 8 national meteorological stations in the northwest region of Liaoning Province from April to October during 1961-2015,methods such as linear trend estimation,moving average,standard deviation and Mann-Kendall test are used to analyze the characteristics of average temperature and precipitation during the crop growing season in northwestern Liaoning.The results show that the average temperature during the crop growing season in the study area showed an upward trend,and the climate tendency rate was 0.193 ℃/10 a( P < 0.01).The largest contribution rate to temperature increase was in September,with a climate tendency rate of 0.27 ℃/10 a;the smallest contribution rate to the temperature increase was in July,with a climate tendency rate of 0.10 ℃/10 a.The warming trend was the most obvious in the second base year,with a climate tendency rate of 0.413 ℃/10 a( P < 0.01).The temperature was the lowest in the 1970s and the highest in the 2010s.The warming trend changed suddenly in 1996,and the sudden change reached a significant level of α = 0.05 after 2002.Precipitation was generally decreased,and the climate tendency rate was -7.68 mm/10 a.The decrease in precipitation was the most in July,and the climate tendency rate was -12.08 mm/10 a.The average temperature in the four base years failed to pass the correlation significance test.Among them,it showed an increasing trend in the second and third base year and a decreasing trend in the first and fourth base year.Rainfall was the highest in the 1960s and the lowest in the 1980s.After the abrupt change in 2002,precipitation decreased significantly.The research results provide reference for effective utilization of climate resources,rational adjustment of agricultural planting structure,and improvement of ecological environment quality.

Application of Cloud Precipitation Analysis System in Weather Modification in Fuxin

Based on Cloud Precipitation Analysis System(CPAS),the potential for weather modification during the four types of typical precipitation processes in Fuxin area in 2019 was analyzed,and the model forecast products before weather modification operation and the surface rainfall were compared.