Coupling Characteristics of Zonal and Meridional Sea Level Change Revealed by Satellite Altimetry Data and Their Response to ENSO Events

详细信息   

• 责任者：Yu Zhaoyuan (Key Laboratory of VGE ; Ministry of Education ; Nanj ing Normal University ; Nanj ing 210046 ; China) ; Yuan Linwang
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(8)
• 关键词：海平面变化 ; sea-level changes ; 厄尔尼诺现象 ; El Nino ; 卫星测量 ; satellite measurements
• 页码：p.1972-1982
• 图表：6 illus., 1 table, 33 refs.
• 分类号：2100
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

Abstract Principle Tensor Analysis of Rank 3 Method （PTA3） was applied to Equatorial Pacific satellite altimetry data during 1993 to 2008. The coupling process of the zonal and meridional sea level changes were reconstructed by the first two principle tensor components and compared using the longtidue and latitude components indexes during six typical periods when different kinds of ENSO events occured. The multi-scale energy coherence and phase relations between temporal index of each princple tensor and MEI series revealed that both zonal and meridional sea level changes are strongly impacted by the El Nino Modoki. Differences exist in coupling scale, the energy resonance relations and phase relations. Reconstructed spatial patterns of both zonal and meridional sea level changes suggest that the location of high and low sea level, the amplitude oftidal waves, the distribution patterns and spatial range of the high- and low-valule areas are different among kinds of ENSO events. Most of the classical El Nino perform as the East Pacific type, while the El Nino Modoki is usually shown as the Middle Pacific type. To some extent, differences in cyclical characteristics, regularity and direction of their trajectories could be used for classification of different types of ENSO events.