天水市1961-2010年积温变化特征

Variation characteristics of accumulated temperature from 1961 to 2010 in Tianshui City

运用天水市7个国家基本(一般)气象站1961-2010年温度资料,借助于气候变化率、Mann-kendall等方法,对该地近50年农业气候热量资源变化规律进行了分析。结果表明:1961-2010年,该地年平均气温、年平均最低气温呈明显上升趋势;≥0℃的积温及≥0℃的日数、≥5℃的积温及≥5℃的日数、≥10℃的积温及≥10℃日数均有明显增加趋势;<0℃的积温及<0℃的日数呈减少趋势。气温升高、正积温及其天数增加和负积温及其天数减少有利于农业生产。建议根据气候变化,科学调整种植结构,充分利用农业气候热量资源。

Based on date of temperature in seven weather stations,we analyzed the variation law of accumulated temperature in Tianshui from 1961 to 2010 using the rate of climate change and Mann-kendall.The results showed that the annual mean temperature,average maximum temperature and average minimum temperature had gone up.The quantitative value of ≥0℃ accumulated temperature and the days above ≥0℃,the quantitative value of ≥5℃ accumulated temperature and the days above ≥5℃ and the quantitative value of ≥10℃ accumulated temperature and the days above ≥10℃ had increased.The quantitative value of 0℃ negative accumulated temperature and the days below 0℃ had decreased.The condition of temperature rising,positive accumulated temperature and its days increasing and negative accumulated temperature and its days decreasing were good for agriculture production.We should adjust the structure of plant according to climate change and make full use of agrometerological heat resources.