中國冬季氣溫變化的空間模態(tài)及其與大尺度環(huán)流異常的聯(lián)系

氣候變化研究進(jìn)展 ?? 2007, Vol. 03 ?? Issue (05): 266-270.

中國冬季氣溫變化的空間模態(tài)及其與大尺度環(huán)流異常的聯(lián)系

朱艷峰譚桂容王永光

國家氣候中心預(yù)測(cè)室

收稿日期:2006-10-18 修回日期:2006-10-25 出版日期:2007-09-30 發(fā)布日期:2007-09-30
通訊作者: 朱艷峰

Variation of Spatial Mode for Winter Temperature in China and Its Relationship with the Large Scale Atmospheric Circulation

Received:2006-10-18 Revised:2006-10-25 Online:2007-09-30 Published:2007-09-30

摘要/Abstract

摘要： 分析了近55 a來中國冬季氣溫變化特征及其與大尺度環(huán)流異常的關(guān)系，結(jié)果顯示：1) 中國冬季氣溫變化有兩個(gè)主要空間模態(tài)，第一模態(tài)表現(xiàn)為20世紀(jì)80年代中期以后全國一致變暖；第二模態(tài)表現(xiàn)為80年代以后東北、西北地區(qū)冬季氣溫升高，而西南、華南地區(qū)氣溫降低。2) 西伯利亞高壓變化與中國冬季氣溫變化的第一模態(tài)關(guān)系密切，當(dāng)西伯利亞高壓偏強(qiáng)時(shí)，我國大部分地區(qū)氣溫偏低，反之亦然。3) 北極濤動(dòng)（AO）與冬季氣溫變化的第二模態(tài)關(guān)系密切，它與中國冬季氣溫相關(guān)最顯著的區(qū)域主要在東北和西北地區(qū)，當(dāng)AO為正位相時(shí)，上述區(qū)域氣溫往往偏高。

關(guān)鍵詞: 冬季氣溫, 空間變化模態(tài), 大尺度環(huán)流異常

Abstract: Based on the monthly temperature at 160 stations of China and the NCEP/NCAR reanalysis data from 1951 to 2005, the variation of spatial mode for winter temperature in China and its relationship with the atmospheric circulation were studied. Results show that: 1) The winter temperature changes in China have two great modes. The first mode has an identical signal in whole China and the temperature has increased since the middle 1980s. The second mode has a seesaw pattern between northern and southern China, and shows a warming in Northeast China and Northwest China, and cooling in Southwest China and South China after the middle 1980s. 2) The Siberian High is significantly correlated to the first mode of temperature. There are strong tendencies for cold conditions over most of China associated with the strengthened Siberian High, and contrariwise. 3) Arctic Oscillation (AO) is closely associated with the second mode. There are notable tendencies for warm conditions over Northeast China, and Northwest China associated with the positive AO phase.

Key words: Variation of Winter temperature in China, spatial mode, anomalies in atmospheric circulation

中圖分類號(hào):

P423/P434

朱艷峰譚桂容王永光. 中國冬季氣溫變化的空間模態(tài)及其與大尺度環(huán)流異常的聯(lián)系[J]. 氣候變化研究進(jìn)展, 2007, 03(05): 266-270.

. Variation of Spatial Mode for Winter Temperature in China and Its Relationship with the Large Scale Atmospheric Circulation[J]. Climate Change Research, 2007, 03(05): 266-270.

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