青藏高原地表溫度對(duì)華北汛期降水變化的影響

doi:10.3969/2012jms.00**

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青藏高原地表溫度對(duì)華北汛期降水變化的影響
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                        10.3969/2012jms.00**
                    
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中圖分類號(hào):P461
基金項(xiàng)目:本文由國(guó)家科技部社會(huì)公益項(xiàng)目（編號(hào)：2002DIB20067）和中國(guó)博士后基金（編號(hào)：2004036410）及江蘇省博士后基金共同資助

THE EFFECTS OF TIBETAN PLATEAU SURFACE TEMPERATURE ON THE PRECIPITATION OVER NORTH CHINA DURING RAINY SEASON

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利用1980-2001年青藏高原月平均地表溫度、1961～2001年我國(guó)160站月降水以及NECP／NCAR再分析月平均高度場(chǎng)資料，分析了華北地區(qū)汛期降水與青藏高原地表溫度的關(guān)系，結(jié)果表明華北地區(qū)汛期降水與青藏高原5～6月地表溫度具有顯著的正相關(guān)。相關(guān)場(chǎng)的正值中心位于高原的東北部和西南部地區(qū)。華北地區(qū)汛期降水偏少年，青藏高原前期5～6月地溫以負(fù)距平為主且距平值較??；相反，降水偏多年，青藏高原前期5～6月地溫以正距平為主且距平值較大。EOF和SVD分析表明，青藏高原5～6月地溫和華北地區(qū)汛期降水的第一典型場(chǎng)都表現(xiàn)出大體一致的變化特點(diǎn)。此外，診斷分析得到，青藏高原5～6月地溫偏高年，7～8月西太平洋副熱帶高壓的強(qiáng)度偏強(qiáng)，位置偏北；地溫偏低年，西太平洋副熱帶高壓的強(qiáng)度偏弱，位置偏南。

Abstract:

The relationship between the rainfall during rainy season over North China and the surface temperature over Tibetan Plateau is analyzed by virtue of the monthly surface temperature over Tibetan Plateau from 1980 to 2001,Monthly NCEP/NCAR reanalysis geopotential height and precipitation at 160 stations of North China from 1961 to 2001.The results show that the notable interrelation is present in the relationship between rainfall during rainy season over North China and the surface temperature during May and June over Tibetan Plateau. The positive center of interrelation fields is located in Northeast and Southwest in Tibetan Plateau. The negative anomaly occupies a dominant position with minor absolute value for drought rainy season over North China,in contrast,the positive anomaly is principal with larger value for flood rainy season over North China . The analyses by EOF and SVD methods indicate that the first pairs of singular grounds of Tibetan Plateau's surface temperature during May and June and the precipitation during rainy season over North China display roughly consistent anomaly change. Furthermore,the diagnostic results present that West Pacific Subtropical High goes stronger and is situated in the northern side during rainy season over North China when the surface temperature over Tibetan Plateau during May and June becomes higher,the opposite is true when the surface temperature over Tibetan Plateau during May and June becomes lower.

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余錦華,榮艷淑,任健.青藏高原地表溫度對(duì)華北汛期降水變化的影響.氣象科學(xué),2005,(6):579-586 Yu Jinhua, Rong Yanshu, Ren Jian. THE EFFECTS OF TIBETAN PLATEAU SURFACE TEMPERATURE ON THE PRECIPITATION OVER NORTH CHINA DURING RAINY SEASON. Journal of the Meteorological Sciences,2005,(6):579-586

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