摘要
分析上海市奉贤区1959—2007年四季初终期及初终期间隔日数的基本气候特征及变化趋势。结果表明:春季初日在1990年代前呈小幅波动,进入2000年以后呈明显的提早趋势,夏季初日呈明显的逐年代提早的趋势,秋季初日进入1990年代后呈逐年代推迟趋势,冬季初日气候倾向不明显;春季初终期间隔日数年代际气候倾向不明显,夏季则表现出逐年代延长的趋势,秋季和冬季分别自1990年代和1980年代后呈现出逐年代缩短趋势。在此基础上分析了四季初终期及间隔日数变化与主要作物、果树物候期和产量的相关关系。气温的上升是影响四季初终期及间隔日数变化的基本因素。
Based on the analysis of the first day and the last day of four seasons and the duration from the first day to the last day in the seasons in Fengxian District of Shanghai from 1959 to 2007,the changes in these basic climatic characteristics and the trend were analyzed.The results showed that the first day of the spring was in a state of little fluctuation before the 1990s,but it has seemed to be significantly earlier since 2000.The first day of the summer became earlier gradually with decades.The first day of the autumn had trends to be postponed since the 1990s.The first day of the winter had no obvious climatic changes.The duration from the first day to the last day of the spring had no obvious climatic trends,but they have been prolonged for summer since the 1960s.The duration of the autumn(since the 1990s) and the winter(since the 1980s) had the tendency to be shortened.On the basis of the above analysis,the relationships between these variables and the phonological phase and yield on main crops and fruit tree in Fengxian were analyzed.The changes of the first day and the last day and the duration of four seasons were mainly influenced by the significant increase of air temperature.
出处
《大气科学研究与应用》
2008年第2期106-112,共7页
Atmospheric Science Research and Application
