Agro-climatic Resources Characteristics Analysis during Frost Season in Chaoyang City

To study the agro-climate resources changes in frost season,is to provide a scientific basis for the successful agriculture development in frost season in Chaoyang city,and to promote the favorable and avoid the unfavorable climatic resources.Based on meteorological data in Chaoyang city during 1953-2010,using the trend rate,the standard deviation statistical methods to analyze the light,heat and water resources variations.The results showed that: in the past 58 years,due to climate warming,trend of frost season shortening was obvious,and meteorological elements had different performances.Compared to data in 1950 s and 1960 s,in this nearly 20 years,temperatures in frost season increased by 2.0 ℃;sunshine time reduced by 159 h;precipitation increased by 6.6 mm;and cloudy day number changed smoothly.Rich solar energy resources,evident global warming are the agro-climatic characteristics in frost season and low natural disasters rate in frost season are very favorable to facility agriculture development.