1950～2010年PDO对北太平洋地区海平面变化影响的量化与评估

发布时间：2018-06-14 19:40

本文选题：太平洋年代际涛动 + 区域海平面变化　；参考：《海洋科学》2017年04期

【摘要】：本文研究和估计了1950~2010年不同太平洋年代际涛动(Pacific decadal oscillation,PDO)事件对北太平洋地区的海平面上升趋势所造成的影响。研究使用了SODA(Simple Ocean Data Assimilation)的海表面高度(sea surface height,SSH)数据资料,通过多元线性回归方法,分离了由PDO事件所引起的海表面高度变化(PDO-SSH),以此分析PDO事件对海平面变化所造成的影响。结果表明,PDO-SSH所引起的海表面变化趋势的空间分布,及其对区域海平面变化的遮掩效果,和对应时期内PDO信号的振幅和周期有着紧密的关系。进一步的分析表明,PDO事件对北太平洋地区SSH变化所造成的影响是不均匀的,在东西太平洋有着相反的变化趋势。1960~1989年,具有较长数据时间长度的PDO信号对海平面变化的影响,要强于高度计投入使用后的时期的表现,而受其影响最重的海域出现在赤道西太平洋海域、阿留申群岛及北美沿岸地区,PDO-SSH在上述地区SSH的占比甚至高达60%。
[Abstract]:This paper studies and estimates the effects of Pacific decadal Oscillation (PDO) events on the sea-level rise trend in the North Pacific from 1950 to 2010. The data of sea surface height (sea surface height) based on simple Ocean data assimilation (SODAO) were used to separate the sea surface height change (PDO-SSH) caused by PDO events by multivariate linear regression method, so as to analyze the influence of PDO events on sea level change. The results show that the spatial distribution of the trend of sea surface change induced by PDO-SSH and its masking effect on regional sea level change are closely related to the amplitude and period of PDO signal in the corresponding period. Further analysis shows that the impact of PDO events on SSH changes in the North Pacific region is uneven, and that in the East and West Pacific, PDO signals with a longer data duration have an opposite trend of variation. The effects of PDO signals with a longer data duration on sea level changes are observed in the East and West Pacific. In order to outperform the performance of the altimeter after it was put into use, the most affected sea area appears in the western equatorial Pacific Ocean. The proportion of PDO-SSH in the Aleutian Islands and the North American coastal area is even as high as 60%.
【作者单位】：中国科学院海洋研究所海洋环流与波动重点实验室;青岛海洋科学与技术国家实验室海洋动力过程与气候功能实验室;中国科学院大学;
【基金】：国家自然科学基金项目(41376028);国家自然科学基金创新研究群体项目(41421005) 国家重点基础研究发展973计划(2012CB956000) 中国科学院百人计划(Y32109101L) 遥感科学国家重点实验室开放研究基金(OFSLRSS201504) 青岛市创业创新领军人才计划(13-CX-26) 国家自然科学基金-山东省-海洋科学研究中心联合资助项目(U1406401) 山东省自然科学基金(ZR2014DQ027)~~
【分类号】：P731.23

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