冬季北太平洋風(fēng)暴軸異常及其與東亞大氣環(huán)流的關(guān)系

doi:10.3969/2012jms.0175

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冬季北太平洋風(fēng)暴軸異常及其與東亞大氣環(huán)流的關(guān)系
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                        10.3969/2012jms.0175
                    
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基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目（41075070）；公益性行業(yè)（氣象）科研專項(xiàng)（GYHY201306028）；江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程（PAPD）

Storm track anomaly over the north Pacific in winter and its relation with atmospheric circulation over east Asia

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利用NCEP/NCAR逐日再分析資料，應(yīng)用濾波方差、相關(guān)分析、合成分析等研究了1963年冬季至2011年冬季北太平洋風(fēng)暴軸的時(shí)空演變特征，并探討了風(fēng)暴軸活動(dòng)強(qiáng)弱與東亞—北太平洋大氣環(huán)流的關(guān)系。結(jié)果表明：與1980s后期風(fēng)暴軸活動(dòng)顯著增強(qiáng)相比，近10 a來(lái)風(fēng)暴軸活動(dòng)又進(jìn)入較氣候平均水平偏低的階段，且風(fēng)暴軸主體位置有著向東北、西南兩側(cè)的振蕩現(xiàn)象。風(fēng)暴軸活動(dòng)強(qiáng)（弱）年，東亞地區(qū)近地面溫度偏高（低）、對(duì)流層低層阿留申低壓和西伯利亞高壓偏弱（強(qiáng)）、中國(guó)東部及日本上空850 hPa北風(fēng)減弱（加強(qiáng)）；對(duì)流層中層?xùn)|亞大槽減弱北縮（加深南進(jìn)）、對(duì)流層高層西風(fēng)急流減弱（加強(qiáng)）。風(fēng)暴軸活動(dòng)與冬季影響中國(guó)的冷空氣活動(dòng)次數(shù)相關(guān)關(guān)系顯著。

Abstract:

Based on the NCEP/NCAR daily analysis data, this paper analyzes the temporal and spatial evolution characteristics of storm track over the north Pacific in winter from 1963 to 2011 and the relationship between the strength of the storm tracks and atmospheric circulation over east Asia and the north Pacific by filter variance,correlation and composite analysis methods. The results indicate that the storm track activity has become weaker in recent ten years compared to the significant strengthening years of late 1980s, with the location of main body north-eastwarding and south-west warding. It is also revealed that in the years when the storm track activity is strong (weak), the near surface temperature is anomalously high (low) in east Asia; the Aleutian low and Siberian high are reduced (enhanced) and the northerlies become weaker (stronger) at 850 hPa over east China and Japan in the lower troposphere; the east Asia trough weakens (strengthens) and retreats (extends) northward (southward) in the mid-troposphere, while in the higher troposphere, the westerly jet becomes weaker (stronger). The storm track activity is closely related to the frequency of cold air activity in China.

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顧沛澍,朱偉軍,劉鳴彥,高潔,曾鼎文.冬季北太平洋風(fēng)暴軸異常及其與東亞大氣環(huán)流的關(guān)系.氣象科學(xué),2013,33(6):610-618 GU Peishu, ZHU Weijun, LIU Mingyan, GAO Jie, ZENG Dingwen. Storm track anomaly over the north Pacific in winter and its relation with atmospheric circulation over east Asia. Journal of the Meteorological Sciences,2013,33(6):610-618

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收稿日期:2012-09-15
最后修改日期:2012-11-16
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在線發(fā)布日期: 2013-12-27
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抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说