朝阳地区霜期农业气候资源特征分析

研究霜期农业气候资源变化,为朝阳地区霜期农业顺利发展、趋利避害提供科学依据。利用朝阳1953—2010年气象资料,采用倾向率、标准偏差统计方法,分析霜期光热水资源变化特征。结果表明,近58 a来,因气候变暖朝阳地区霜期缩短趋势明显,气象要素有不同的表现。与20世纪五六十年代相比,近20 a里霜期气温升高2.0℃,日照时间减少159 h,降水量增加6.6 mm,阴天日数变化平稳。光能资源丰富、气候变暖明显是朝阳地区霜期农业气候特点,霜期自然灾害发生率低对霜期设施农业发展十分有利。

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.