气候与水文

石羊河流域≥10 ℃积温时空变化特征

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  • 1 甘肃省武威市气象局,甘肃 武威 733099;  中国气象局兰州干旱气象研究所,甘肃 兰州 730020
杨晓玲(1971-),女,甘肃省人,理学硕士,高级工程师,研究方向为天气预报及气候变化.E-mail:wwqxj6150343@163.com

收稿日期: 2019-06-25

  修回日期: 2019-09-30

  网络出版日期: 2020-05-25

基金资助

国家自然基金(41775107,41305134);甘肃省气象局第八批“十人计划”;武威市科研项目(WW190103)资助

Spatial and temporal change characteristics of ≥10 accumulative temperature in Shiyang River Basin

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  • Wuwei Meteorological Bureau of Gansu Province,Wuwei 733099,Gansu,China;Lanzhou Institute of Arid Meteorology,CMA,Lanzhou 730020,Gansu China

Received date: 2019-06-25

  Revised date: 2019-09-30

  Online published: 2020-05-25

摘要

利用19602017年石羊河流域5个气象站逐日平均气温资料,采用滑动平均方法,确定了≥10 ℃积温的界限;通过运用多元线性回归、均方差 (σ)、线性趋势系数、累计距平和信噪比等方法,分析了石羊河流域≥10 ℃积温的时空变化特征。结果表明:石羊河流域≥10 ℃积温具有明显地域特征,≥10 ℃积温的均值和极值均为荒漠区高于绿洲平原区,绿洲平原区高于山区,≥10 ℃积温的空间分布与所受天气系统以及经、纬度和海拔高度的关系非常密切。≥10 ℃积温正常年份最多,概率超过65%,依次向两端迅速递减。年、年代≥10 ℃积温呈显著升高趋势。≥10 ℃积温主要在59月,7月为高峰值。≥10 ℃积温气候突变全流域、民勤和天祝在1996年,永昌、凉州和古浪在1997年。石羊河流域≥10 ℃积温升高使喜凉作物种植面积缩小,生育期缩短,不利于高产的形成;而使喜温作物种植面积扩大,生育期延长,有利于高产和高品质的形成。本研究将对现代农业结构规划、农作物品种调整以及农业的定量化评估具有重要意义。

本文引用格式

杨晓玲, 丁文魁, 孙占峰, 王鹤龄 .

石羊河流域≥10 ℃积温时空变化特征[J]. 干旱区地理, 2020 , 43(3) : 584 -591 . DOI: 10.12118/j.issn.1000-6060.2020.03.04

Abstract

Accumulative temperature is an important climate resource and crop growth and development index.In this paper,using daily average temperatures of five meteorological stations in Shiyang River Basin,Gansu Province,China during 1960-2017,acumulative ≥10 temperature was determined using the sliding average method.Spatiotemporal changes in acumulative 10 temperature were analyzed via multiple linear regression,mean square deviation (σ),linear trend coefficient,cumulative anomaly,and signal-to-noise ratio methods.The results showed that the acumulative 10 temperature of Shiyang River Basin has obvious regional characteristics.In the desert area,the average and extreme values of acumulative 10 temperature were higher than those in the oasis plain,and the temperature in the oasis plain was higher than that in the mountainous area.The regional distribution of acumulative 10 temperature was closely related to the weather system,longitude,latitude,and altitude.In normal years,acumulative 10 temperature was the most common,the probability of which exceeded 65%,which was the ends of decline.Annual and decadal acumulative 10 temperatures showed a significant upward trend.The acumulative 10 temperature mainly occurs from May to September,with the highest peak in July.Abrupt changes in acumulative 10 temperature occurred in the entire basin,including Minqin and Tianzhu in 1996,and Liangzhou,Yongchang,and Gulang in 1997.When the acumulative 10 temperature in the Shiyang River Basin rises,the planting zones decrease and the growth period becomes shorter,which is not favorable for the high yields of cool-weather crops and while it is favorable for the warm-weather crops.This paper revealed new pattern of heat resources and its impacts on agriculture in Shiyang River Basin.This is very important for modern agricultural planning,crop variety adjustment,and agricultural quantitative evaluation.

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