1993～2015年中国南海海平面变化的初步研究  

Initial Research on Sea Level Change in the South China Sea from 1993 to 2015

作　　者：潘轶[1] 岳建平[1] 宋亚宏 彭刚跃 章鹏[1] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100

出　　处：《地理空间信息》2017年第10期9-12,共4页Geospatial Information

基　　金：国家自然科学基金资助项目(41174002)

摘　　要：利用多代卫星测高资料,采用线性回归、傅里叶变换、经验模态分解(EMD)算法等,对1993~2015年中国南海海平面变化的规律进行分析。结果表明,近23 a来,中国南海海平面总体呈现明显上升趋势,平均上升速率为2.4 mm/a,具体上升速率呈现先上升后下降趋势。中国南海海平面存在显著的年际和年代际变化,其主要变化周期有1 a,0.5 a,1.5 a,2~3 a,4~7 a,其中最显著的为1 a周期信号,夏秋季节海平面高度较高,春冬季节较低。Using multi-generation satellite altimetry data, this paper used linear regression, Fourier transform and empirical mode decomposition(EMD) algorithm to analysis the laws of the sea level change of the South Sea in China from 1993 to 2015. The results show that over the past 23 years, the South Sea level change shows an overall rising trend, rise by an average rate of 2.4 mm/a, and the specific rise rate downward after the upward trend. There are significant annual and decadal changes, the main change cycle including 1 a, 0.5 a, 1.5 a, 2~3 a, 4~7 a. The most significant signal is 1 a. The South Sea levels in summer and autumn are higher than those in spring and winter.

关 键 词：卫星测高 南海海平面变化 线性回归 傅里叶变换 EMD算法 

分 类 号：P229[天文地球—大地测量学与测量工程]