长江流域资源与环境 >> 2010, Vol. 19 >> Issue (2): 169-.

• 自然资源 • 上一篇    下一篇

南京市不同时间尺度温度变化特征

倪敏莉1, 2|张佳华2*|申双和1   

  1. (1.南京信息工程大学应用气象学院|江苏 |南京 |210044;2.中国气象科学研究院遥感与气候信息开放实验室|北京 |100081)
  • 出版日期:2010-02-20

STUDY OF TEMPERATURE CHANGES ON DIFFERENT TIME SCALE IN NANJING CITY

NI Minli1,2|ZHANG Jiahua2|SHEN Shuanghe1   

  1. (1. College of Applied Meteorology, Nanjing University of Information Science &|Technology, Nanjing 210044, China|2.Laboratory for Remote Sensing and Climate Information Sciences,Chinese Academy of Meteorological Sciences, Beijing 100081, China)
  • Online:2010-02-20

摘要:

利用南京市1951~2005年的气温资料,研究了南京市不同时间尺度的气温变化特征。结果表明:1951~2005年,南京市温度的年变化呈现上升趋势,年平均最高温度的上升幅度较年平均最低温度高,温度日较差(DTR)的年平均值为下降趋势,1992年可作为近55a南京地区冷暖期的转折点。温度的季节变化也多数呈现上升趋势,四季的平均气温增暖幅度最大是春季,最小的是夏季;四季的平均最高气温与平均最低气温多数都表现为上升的趋势,只有夏季的平均最高温度表现为下降的趋势。因此,近55a南京市在温度总体呈现上升趋势的情况下,夏季有变凉的趋势。四季的DTR的变化中,只有春季为上升趋势,其余季节都是下降的趋势。极端年份的日平均温度变化趋势基本一致,但各年份的DTR变化趋势却不相同。

关键词: 南京市/气温变化/温度日较差(DTR)/近55年/ 不同时间尺度

Abstract:

This paper explored the urban temperature variation in Nanjing City of southern China in past 55 years.The observed meteorological data during 1951 to 2005,including average mean temperature,maximum temperature,and minimum temperature in annual,seasonal and daily time scales,have been used to study the characteristics of temperature changes in different time scales in Nanjing City.The linear statistical method was used to analyze the temperature change trend by the time scale.The results show that,the temperature increased with years,but diurnal temperature range (DTR) decreased with years.And the average maximum annual temperature increased more quickly than the average minimum annual temperature.The year of 1992 could be a turning point of coldwarm period in Nanjing City in recent 55 years.The temperature of four seasons mostly increased,the linear trend of average temperature increased at 0.33 ℃/10a in the spring,0.05 ℃/10a in the summer,0.18℃/10a in the autumn,and 0.27 ℃/10a in the winter,respectively.The increase amplitude of temperature was highest in spring and lowest in summer.The average maximum and minimum temperature of four reasons also increased mostly,while the average maximum temperature of summer decreased.Therefore,the temperature generally increased in Nanjing city in recent 55 years,however,the summer showed the trend of becoming cool.The DTR increased in spring and decreased in the other season.The trends of daily average temperature changes in extreme years were basically consistent,while the the change of DTR were different in 1955 and 2005.

Key words: Nanjing City/ air temperature change/ DTR, last 55 years/ different time scale

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