【摘要】 以同期(1988～2001年)南京市的远郊林区空旷地定位观测点与市内气象站的气温观测为依据,南京市常年(1961～1990年)气温资料作基准,研究近14年来南京市平均气温的概况。用月均温的变幅、月际差和年、季均温值的年际变化来说明南京城市森林的近期气温特点。结果表明:林区同期的3种温度的平均值及年较差都低于市区;四季长度比市区的秋、冬季各长1候,夏季短2候。与常年气温相比,近14年冬季呈增温的趋势,但市区比林区更明显。更多还原

【Abstract】 Based on the normal temperature at the urban Nanjing(1960～1990),the variation of air temperature in the urban forest of Nanjing is analyzed using data measured daily at two meteorological observing stations(an urban site and an open site of the ecological station) from 1988 to 2001.It was also described by the normals,annual range,monthtomonth difference,amplitude of the monthly variation etc.During the past 14 years the means of the air temperature in an open site of the urban forest are always lower than the urban site in the monthly means(0.2～1.5 ℃) and annual ranges(0.2～0.6 ℃).The annual variations of the air temperature at two site have analogy with the normal temperature,it is the hottest in July and the coldest in January.The yeartoyear variations of the annual and seasonal means and the abnormal phenomena of the monthly means are analogy at two sites.The cooling effect of the forest area is more remarkable in the nighttime than that in the daytime.更多还原