中國東部氣溫異常型與海表溫度異常模關(guān)系的診斷

doi:10.3969/2013jms.0051

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中國東部氣溫異常型與海表溫度異常模關(guān)系的診斷
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                        10.3969/2013jms.0051
                    
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基金項目:公益性行業(yè)(氣象)科研專項(GYHY200906016);國家重點基礎(chǔ)研究發(fā)展計劃項目(973計劃)項目(2012CB955903);江蘇省高校自然科學(xué)重大項目(13KJA170002)

Relationship between anomalous pattern of air temperature in eastern China and sea surface temperature anomaly mode

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基于國家氣候中心整編的160站常規(guī)觀測氣溫資料和HADLEY中心的海表溫度資料,應(yīng)用最大協(xié)方差分析方法,診斷了中國東部各季節(jié)氣溫異常型和前期海表溫度異常(SSTA)模的關(guān)系,并重點分析冬季氣溫與SSTA模的最佳耦合模態(tài)及海溫異常對大氣環(huán)流的影響.結(jié)果表明:中國東部四季氣溫異常型與前期海盆SSTA模的顯著耦合關(guān)系表現(xiàn)出不同的特征.超前6個月的熱帶太平洋第二模和南印度洋第二模與東部地區(qū)冬季氣溫一致變化型耦合關(guān)系最佳.西南冷東北暖的氣溫異常型與超前4個月熱帶大西洋一致增暖模有最佳耦合關(guān)系.大氣環(huán)流對與全區(qū)氣溫一致偏冷型對應(yīng)的SSTA模的回歸表現(xiàn)為:西伯利亞高壓和阿留申低壓增強,東亞大槽加深,中緯度西風(fēng)加強.對與氣溫西南冷東北暖型對應(yīng)的SSTA模的回歸表現(xiàn)為:西伯利亞高壓和阿留申低壓略有增強,東亞大槽槽區(qū)附近位勢升高,大槽變淺,槽線偏向西南,東部40 °N以北風(fēng)速加強,以南風(fēng)速減弱.

Abstract:

Based on the conventional observation data of temperature from 160 stations reorganized by the National Climate Center and the sea surface temperature data from HADLEY center, the relationship between the season,al anomalous pattern of temperature in eastern China and the sea surface temperature anomalies(SSTA) mode at early stage is diagnosed by maximum covariance analysis method moreover, the influence of the best coupling mode of winter temperature and SSTA mode, as well as sea surface temperature anomalies on atmospheric circulation is emphasized to analyze. The results show that the significant coupling patterns between the seasonal temperature anomaly in eastern China and the SSTA mode at early stage exhibit different features. The second modes of the southern Indian Ocean and the tropical Pacific El Niño mode which appeared 6 months earlier have the most significant coupling relation with the consistent variation pattern of winter temperature over eastern China. The winter temperature anomalous type with warm northeast and cold south west is most significantly coupled with the consistent warming mode over the tropical Atlantic leading by 4 months. The regression of atmospheric circulation on the SSTA patterns corresponding to the consistent cold types shows that the Siberian High and the Aleutian Low enhance, the East Asian trough deepens and the mid-latitude westerlies strengthen. Regression on SSTA mode corresponding to southwest cold-northeast warm type shows that the Siberian High and the Aleutian Low enhance slightly, Arctic sea level pressure reduces, mid-latitude potential raises, East Asian trough swallows, trough line turns to the southwest, zonal wind in the north of 40 °N in eastern China increases, but it weakens in the south.

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關(guān)惠戈,余錦華.中國東部氣溫異常型與海表溫度異常模關(guān)系的診斷.氣象科學(xué),2014,34(6):656-665 GUAN Huige, YU Jinhua. Relationship between anomalous pattern of air temperature in eastern China and sea surface temperature anomaly mode. Journal of the Meteorological Sciences,2014,34(6):656-665

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收稿日期:2013-03-05
最后修改日期:2013-05-30
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在線發(fā)布日期: 2015-01-14
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