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根据大气运动流函数/速度势定义的北方涛动指数及其应用
Northern Oscillation Index Defined Based on Stream Function and Velocity Potential of Atmospheric Movement and Its Application
【摘要】 将水平风速分解为无辐散(有旋)分量和辐散(无旋)分量,然后将北太平洋高压(NPH)中心处一点(35°N,130°W)和西太平洋低压处Darwin站(10°S,130°E)之间的流函数距平/速度势距平之差定义为北方涛动指数(NOI),分析了该指数与其他一些传统指数的相关性和差异,并讨论了该指数在气候过程分析中的若干应用。
【Abstract】 The horizontal wind velocity can be decomposed into nondivergent (rotational) component and divergent (irrotational) component, and the Northern Oscillation index (NOI) is defined as the difference between the stream function/velocity potential anomalies at the North Pacific high center (35 N,130 W) and the Darwin station (the western Pacific low) (10 S, 130 E). In this paper, the correlation and difference between NOI and other traditional indices are analyzed,and some applications of NOI in analyzing climatic process are discussed.
【关键词】 流函数;
速度势;
北方涛动指数;
气候变异;
【Key words】 <Keyword>stream function; velocity potential; Northern Oscillation index; climate variability;
【Key words】 <Keyword>stream function; velocity potential; Northern Oscillation index; climate variability;
【基金】 国家自然科学基金项目———太平洋-印度洋暖池动力学及海-气相互作用(40231012);国家科技部国际合作项目———太平洋-印度洋暖池的Argo观测和研究(2002CB714001)
- 【文献出处】 海洋科学进展 ,Advances in Marine Science , 编辑部邮箱 ,2005年03期
- 【分类号】P732.6
- 【被引频次】1
- 【下载频次】172