J4 ›› 2008, Vol. 26 ›› Issue (1): 8-12.

• 论文 • 上一篇    下一篇

西北地区热量资源对气候变化的响应特征

孙兰东1, 2 ,刘德祥2   

  1. 1. 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室, 中国气象局干旱气候变化
    与减灾重点开放实验室,甘肃 兰州 730020; 2. 兰州区域气候中心,甘肃 兰州 730020
  • 收稿日期:2007-10-29 修回日期:2008-02-04 出版日期:2008-03-31 发布日期:2008-03-31
  • 作者简介:孙兰东(1968 - ) ,女,河南叶县人,高级工程师,从事气候变化及影响评估工作. E - mail: sldlydia@yahoo. com. cn
  • 基金资助:

    中国气象局气候变化专项“气候变化对祁连山区冰雪水资源影响的研究”(CCSF2007 - 26)和中国气象局业务轨道建设项目“气象灾害风险区划- 沙尘暴区划”共同资助

Character istics of Hea t Resources in Respon se to Clima te Change in Northwest Ch ina

SUN Landong1,2 Dexiang1, 2   

  1. 1. Institute of A rid M eteorology, CMA; Key Laboratory of A rid Clim atic Change and Reducing D isaster
    of Gansu Province; Key Open Laboratory of A rid Clim ate Change and D isaster Reduction of CMA, Lanzhou 730020, China;2. Lanzhou Regional Clim ate Center, Lanzhou 730020, China
  • Received:2007-10-29 Revised:2008-02-04 Online:2008-03-31 Published:2008-03-31

摘要:

基于西北5省(区) 150个测站1961~2003年历年日平均气温,引入气候趋势系数和气候倾向率,对< 0 ℃负积温、> 0 ℃和> 10 ℃积温对气候变化的响应特征进行分析。采用EOF分解后的时间系数,利用小波和M - K分析方法,对< 0 ℃负积温、> 0 ℃和> 10 ℃积温的时间演变特征进行分析。结果表明:西北地区< 0 ℃负积温表现为全区一致增加趋势,平均气候倾向率为52. 9 ℃/10 a,增长最快; > 0 ℃积温的平均气候倾向率为50. 7 ℃/10 a,西北地区> 10 ℃积温的平均气候倾向率为49. 3 ℃/10 a,增长最慢。< 0 ℃负积温、> 0 ℃和> 10 ℃积温均从1986年开始增加,在1995年后增加趋势更加明显。1987年是负积温显著增温的突变年份, > 0 ℃积温在1996年前后发生突变, > 10℃积温在1995年前后发生变。小波分析结果呈现出< 0 ℃负积温存在准6 a和准9 a的振荡周期;> 0 ℃和> 10 ℃积温存在准8 a变化周期。

关键词: 西北地, 积温, 小波分析, 气候倾向率

Abstract:

on the daily average temperature of 150 weather stations in northwest China from 1961 to 2003, the characteristics ofthe < 0 ℃ , > 0 ℃ and > 10 ℃accumulated temperature in response to climate change have been analyzed by using climatic tenden2cy coefficient and climatic tendency quotiety. The interannual change of < 0 ℃ , > 0 ℃ and > 10 ℃ accumulated temperature have been analyzed based on the time coefficient from EOF bymeans ofwavelet analysis andMann Kendallmethod. The results show that < 0 ℃, > 0 ℃ and > 10 ℃ accumulated temperature p resented increasing trend in Northwestern China, and the mean climatic tend2
ency quotieties of < 0 ℃ negative accumulated temperature, > 0 ℃ and > 10 ℃accumulated temperature are 52. 9 ℃/10 a, 50. 7℃/10 a, 49. 3 ℃/10 a,respectively.

Key words: China, accumulated temperature, wavelet analysis, climatic tendency quotiety

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