【摘要】 分析南京市国家气象站和其城市森林林区外(定点)气候站16 a的降水日记录资料,从月降水日数、各月最多一日降水量、暴雨等方面研究了南京城市森林的降水特征。结果表明:多年平均降水日数是林区少于市区7.3 d。两站各月最多一日降水强度按级分布的年变化趋势一致,且11至3月时期,各月日最大降水级可达大雨,中雨级的百分率为林区大于市区,而小雨级则相反。4~10月的各月都可能发生暴雨级降水,两测站暴雨发生的次数及雨量都无明显的差异。更多还原

【Abstract】 The daily rainfall data at two meteorological stations located at an urban site and an open area of the urban forest ecological site from 1988 to 2003 were collected.The author analyzed the rainy days and the daily maximum rainfall of each month,and rainstorms as well in past 16 years.The results showed that the normals of annual rainy days in the urban forest area were 7.3 days less than that in the urban site.During the period of November to March,a daily maximum rainfall could be heavy rain,moreover the percentage of moderate rain days in the forest area was higher than that in the urban area.However,the percentage of small rain days in the urban forest area was lower than that in the urban site.The rainstorm could happen during April to October of each year and at summer in the main,and there was no significant difference at the frequency and rainfall of rainstorm between two sites.更多还原