1959—2009年甘肅極端溫度時空變化及其與AO相關(guān)分析

doi:10.3969/2012jms.0099

首頁 > 過刊瀏覽>2013年第33卷第2期 >190-195. DOI:10.3969/2012jms.0099

1959—2009年甘肅極端溫度時空變化及其與AO相關(guān)分析
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                        10.3969/2012jms.0099
                    
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基金項目:中國氣象局干旱氣象科學(xué)研究基金項目(IAM200919)

The temporal and spatial change of extreme temperature and its association with AO index in Gansu province from 1959 to 2009

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利用1959—2009年甘肅省24個臺站的逐日最高和最低氣溫資料,運用百分位法定義了不同臺站的逐年最高溫度的極端高值、最低溫度的極端低值。研究了甘肅省51 a來極端溫度的時間變化特征;運用多元線性回歸及空間插值法分析了其空間變化特征,并運用Pearson系數(shù)分析了極端溫度與北極濤動(AO)相關(guān)關(guān)系。結(jié)果表明,甘肅省51 a最高溫度的極端高值時間變化特征總體呈增加趨勢,隴東及隴南地區(qū)增溫顯著;最低溫度的極端低值顯著增加的地區(qū)則為甘肅中部及西南部地區(qū)。最高溫度的極端高值大值區(qū)地域集中在河西走廊西部地區(qū),小值區(qū)在祁連山區(qū)及甘南高原;最低溫度的極端低值大值區(qū)集中在隴東及隴南地區(qū),小值區(qū)則在河西走廊的祁連山區(qū)。甘肅地區(qū)最低溫度的極端低值與AO的相關(guān)關(guān)系要比最高溫度的極端高值更為顯著。

Abstract:

Based on the daily maximal and minimal temperature data from 1959 to 2009 at 24 meteorological stations in Gansu province, the extremely high value of the maximal temperature and extremely low value of the minimal temperature of different stations were defined by percentile method, so as to study the temporal change of extreme temperature in Gansu province from 1959 to 2009. The spatial change of extreme temperature was researched by using the multiple linear regression method and the spatial interpolation method, and the Pearson coefficients were applied to analyze the relationship between the extreme temperature and the AO index. The results suggested that the variation characteristics of the extremely high value of the maximal temperature showed an increasing trend during 51 a in Gansu province. There had a significant increase for extremely high value of the maximal temperature in the east and the south Gansu area, as well as a significant increase for extremely low value of the minimal temperature showed in the centre and southwest of Gansu province. The values of the extremely high value of the maximal temperature were centralized in the Gansu Corridor, while the small ones were in the Qilian Mountains and Gannan plateau; the great values of the extremely low value of the minimal temperature were concentrated in the east and south Gansu area, but the small ones were in the Qilian Mountains of Gansu Corridor. The correlation between extremely low value of the minimal temperature and the AO index is more significant than that between extremely high value of the maximal temperature and the AO index.

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肖瑋鈺,王連喜,薛紅喜,吳東麗,李琪.1959—2009年甘肅極端溫度時空變化及其與AO相關(guān)分析.氣象科學(xué),2013,33(2):190-195 XIAO Weiyu, WANG Lianxi, XUE Hongxi, WU Dongli, LI Qi. The temporal and spatial change of extreme temperature and its association with AO index in Gansu province from 1959 to 2009. Journal of the Meteorological Sciences,2013,33(2):190-195

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收稿日期:2011-09-21
最后修改日期:2012-04-12
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在線發(fā)布日期: 2013-04-25
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