| 火山活动对于北大西洋涛动的激发作用 |
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| 引用本文： | 曲维政,朱小洁,赵进平,杜凌,邓声贵,黄菲.火山活动对于北大西洋涛动的激发作用[J].海洋学报,2010,32(2):54-65. |
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| 作者姓名： | 曲维政 朱小洁 赵进平 杜凌 邓声贵 黄菲 |
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| 作者单位： | 中国海洋大学 海洋环境学院,山东 青岛266100 |
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| 基金项目： | 国家自然科学基金(40875041;40631006;40975038)。 |
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| 摘 要： | 为了探索北大西洋涛动形成的大尺度大气物理场背景条件和外部强迫因子,通过对比分析、相关分析和环流系统温压场垂直结构分析得到:(1)强火山活动指数距平与冰岛低压和亚速尔高压海平面气压场(SLP)距平总体相关函数符号相反,强火山活动指数与冰岛低压SLP为反相关,与亚速尔高压SLP为正相关,就是说火山活动指数异常引起了高纬度冰岛低压和中低纬度亚速尔高压海平面气压场相反的变化趋势,形成高低纬之间海平面气压场反相振荡;(2)夏季7月亚速尔高压对流层中下层至海平面,温度距平中心和位势高度距平中心距平符号大致正正相对负负相对,说明夏季亚速尔高压为深厚暖性系统,低层温度升高亚速尔高压加强,低层温度降低亚速尔高压减弱,所以火山活动指数与亚速尔高压SLP均呈反相关关系;冬季1月对流层中下层至海平面,温度距平和位势高度距平符号大致正负相对,说明冬季亚速尔高压为浅薄系统,低层温度升高亚速尔高压减弱,低层温度降低亚速尔高压加强,所以火山活动指数与亚速尔高压SLP均呈正相关关系;(3)冬季1月冰岛低压对流层中下层至海平面,温度距平中心和位势高度距平中心距平符号大致正正相对负负相对,说明冬季冰岛低压为深厚冷性系统,低层温度升高冰岛低压减弱,低层温度降低冰岛低压加深,所以火山活动指数与冰岛低压SLP均呈反相关关系;夏季7月对流层中下层至海平面,温度距平和位势高度距平符号大致正负相对,说明夏季冰岛低压为浅薄系统,低层温度升高冰岛低压减弱,低层温度降低冰岛低压加深,所以火山活动指数与冰岛低压SLP均呈正相关关系;(4).由于对流层中下层至海平面冰岛低压和亚速尔高压冬、夏季温压场结构特点基本相反,火山活动指数异常在两个环流系统中引起了相反响应,导致高低纬之间海平面气压场反相振荡,形成了影响广泛的著名的北大西洋涛动现象。
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| 关 键 词： | 北大西洋涛动 亚速尔高压 冰岛低压 火山活动 温压场垂直分布中图文分类号:P732文献标志码:A |
| 收稿时间： | 2009/3/22 0:00:00 |
| 修稿时间： | 2009/8/27 0:00:00 |
Stimulation of the North Atlantic Oscillation by volcano activities |
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| QU Wei-zheng,ZHU Xiao-jie,ZHAO Jin-ping,DU Ling,DENG Sheng-gui and HUANG Fei.Stimulation of the North Atlantic Oscillation by volcano activities[J].Acta Oceanologica Sinica (in Chinese),2010,32(2):54-65. |
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| Authors: | QU Wei-zheng ZHU Xiao-jie ZHAO Jin-ping DU Ling DENG Sheng-gui and HUANG Fei |
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| Institution: | College of Environment Oceanography,China Ocen University of China, Qingdao 266100,China |
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| Abstract: | Based on the correlation analysis and the analysis of vertical structure of temperature and geopotential field in Icelandic low and Azores high, we found that the Volcanic Explosive Index (VEI) anomaly for volcano eruption above category 5 shows negative correlation with sea level pressure (SLP) in Icelandic low, and positive correlation with SLP in Azores high. From the analysis of the vertical atmospheric structure, it is found that in summer, the Azores high is a deep warm core system and the Icelandic low is a shallow system. Therefore, the VEI shows negative correlation with the SLP in Azores high and positive correlation with SLP in Icelandic low. While in winter, the Azores high is a shallow system and the Icelandic low is a deep cold core system. Hence, the VEI shows positive correlation with the SLP in Azores high and negative correlation with SLP in Icelandic low. Considering the phase shift of the temperature and geopotential height field between summer and winter in Icelandic low and Azores high, the anomaly VEI causes opposite responses in the two circulation system, forms opposite phase SLP oscillation in middle and high latitude, and hence stimulated the famous North Atlantic Oscillation. |
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| Keywords: | North Atlantic Oscillation Azores high Icelandic low volcano activities temperature geopotential field |
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