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投稿时间：2006-04-11 修订日期：2006-11-26
投稿时间：2006-04-11 修订日期：2006-11-26
中文摘要: 通过对甘南地区近40年气温变化特征分析，发现甘肃西南部年平均气温在1990年代初有暖突
变，从1980年代末开始该区域夜间开始明显变暖，到1990年代出现白天、夜间同时变暖的现
象，甘肃西南部的气温突变主要是由于1990年代后白天和夜间温度同时上升造成的。秋季气温
在1980年代末开始上升，夏季和冬季气温到1990年代初开始上升。最高、最低气温和气温日
较差的变化具有明显的季节差异。
Abstract:Based on the monthly temperature data at 7 stations in Gannan, Gansu
Province, the variation characteristics of temperature in recent 40 years were a
nalyzed. The results show that the abrupt change of the annual mean temperature
occurred in the early of 1990s, the night time temperature increased in the end
of 1980s, in the 1990s the temperature of day time and night time increased co
ncurrently, the main reason for the abrupt change of temperature in the area is co
ncurrent increase of the day time and night time temperature in the 1990s. It
is found that a quasi 8 year period is the main period of the mean temperature,
maximum temperature and minimum temperature before the mid 1980s. The mean tempera
ture of autumn began increasing from the end of 1980s, the mean temperatures of
summer and winter began increasing from the early of 1990s.The daily maximum tem
perature, daily minimum temperature and daily range of temperature vary with sea
sons.
keywords: temperature variation period abrupt change
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引用文本：
王建兵,王振国,汪治桂,2007.甘南地区近40年气温变化特征[J].气象,33(1):112-117.
Wang Jianbing,Wang Zhenguo,Wang Zhigui,2007.Analysis of Variation Characteristics of Temperaturein in Gannan, Gansu Province[J].Meteor Mon,33(1):112-117.
王建兵,王振国,汪治桂,2007.甘南地区近40年气温变化特征[J].气象,33(1):112-117.
Wang Jianbing,Wang Zhenguo,Wang Zhigui,2007.Analysis of Variation Characteristics of Temperaturein in Gannan, Gansu Province[J].Meteor Mon,33(1):112-117.