Study on the Future Climate Change and Its Influence on the Growth Stage and Yield of Wheat in Weifang City

In order to study the trend of climate change in the future in Weifang,and analyze the impact of climate change on the local wheat production,the air temperature and precipitation in Weifang from 2021 to 2050 were simulated by using the regional climate model PRECIS.And then put the meteorological data into the crop model to simulate the growth of wheat under climate change conditions in the future.The results showed that there would be a trend of rising temperature and increasing precipitation in Weifang in the future.Climate warming would result in growth period of wheat to be ahead of schedule and yield reduction.If taking into account the effect of CO2,the yield of wheat would increase.

Analysis on the Impact of Facility Agriculture Development on Climate Change in Weifang

[Objective] The research aimed to study the influence of facility agriculture development on the climate variation in Weifang. [Method] Shouguang was selected as the representative station of greenhouse shed planting zone. By using the precipitation, temperature and relative humidity, etc. in Weifang City during 1961-2010, the climatic variation situations in the whole city and the greenhouse shed planting zone were analyzed. The variation trend and evolution characteristics of climate in the different seasons before and after the facility agriculture plantation were contrasted and analyzed. [Result] The annual rainfall and relative humidity presented the declining trend in the whole city in recent 50 years. The annual average, maximum and minimum temperatures all presented the rising trend. Since the large-scale plantation of greenhouse shed, the declining range of annual rainfall in the greenhouse shed planting zone was lower than that in the whole city, and the declining range of relative humidity was obviously higher than that in the whole city. The rising ranges of annual average, maximum and minimum temperatures were higher than that in the whole city. [Conclusion] The research provided the theory basis for the development of facility agriculture.

Study on Climate Change Tendency in the Future in Weifang

The air temperature and precipitation in Weifang during 2021 -2050 were simulated by using the regional climate mode PRECIS. The trend of climate change was analyzed by using 5-year moving average and linear trend estimation. The results showed that in the future, the mean, maximum and minimum temperatures in Weifang all would rise, and annual precipitation would increase. In addition, both high temperature days and rainstorm days would increase.

Application of the Regulations on Drawing of a Safe Firing Area Map in Weather Modification Operation

Technology for safe firing area maps was introduced firstly,and then potential danger after the launching of shells by an antiaircraft gun and a rocket was analyzed.Finally,problems in the process of applying the regulations and their solutions were discussed.The application of safe firing area maps can provide technical support for the efficient development of weather modification operation.

Changing Features of Sunshine Duration and Effects on Greenhouse Production in Shouguang City

Based on data of monthly sunshine duration in Shouguang City during 1961-2013,changing features of sunshine duration and effects on greenhouse production in Shouguang City were analyzed by using linear tendency method,M-K mutation test and Molet wavelet analysis. The results show that in Shouguang City,sunshine duration in a year and each season reduced obviously from 1961 to 2013,and sunshine duration in a year and autumn changed suddenly in the 1990s,while sunshine duration in winter and spring changed suddenly in the 1980s. There existed obvious periodic variations of sunshine duration in a year and various seasons from 1961 to 2013. The reduction of sunshine duration and the increase of cloudy days resulted in the decrease in the yield of crops in solar greenhouses,so some effective measures should be taken to enhance the light intensity and time in solar greenhouses to promote crop growth.

The Interannual and Interdecadal Variations of Tropical Cyclone Affecting Shandong Province

Based on tropical cyclone yearbook data from 1949 to 2006, climate characteristics, such as interdecadal variation, period of tropical cyclone frequency, rainstorm and strong wind, intensity characteristics, were analyzed. Main results were as follows： tropical cyclone affecting Shanalong Province was mainly from the last ten-day of July to the last ten-day of August, and its interdecadal variation was obvious. The marked periodic variation of every 2.4 and 5 years was found according to power spectrum analysis. It showed obvious weakening tendency about tropical cyclone＇s intensity by using Kendall test. It also showed that August was the strongest month among a year for rainstorm frequency and intensity, and flood disaster was more easily to occur during this month. It was distinct for frequency＇s interdecadal variation of tropical cyclone causing rainstorm and strong wind. Marked period was existed about annual average precipitation and strong wind. At the same time, the cause of the variation was discussed.

Study on Occurrence Rule, Reason and Defense Measures of the Thunderstorm in Liaocheng in the Past 50 Years

[ Objective] The research aimed to study occurrence rule, reason and defense measures of the thunderstorm in Liaocheng in the past 50 years. [Method] By using meteorological observation records at 8 observatories of Uaocheng during 1963 -2012, occurrence rule of the thunderstorm was studied. Occurrence reason and defense measures were also analyzed. [ Result] Annual thunderstorm days presented decreasing trend in Liaocheng. The earliest thunderstorm occurred in February, while the latest thunderstorm occurred in November. Thunderstorm mainly appeared in June, July and August, which occupied 77.6% of that in whole year. Thunderstorm days among each county had small difference. Thunderstorm days in Dong＇e County reached the minimum, which was related to local underlying surface. Occurrence reason of the thunderstorm was analyzed from objective and subjective aspects. By combining the actual situation of Liaocheng, corresponding prevention countermeasures were put forward. [Conclusion] The research could provide reference basis for thunderstorm disaster prevention and reduction in Liaocheng.