| 应用数字滤波消除潮位短周期波动对确定海平面变化趋势的影响 |
| |
| 引用本文： | 杨清书,沈焕庭.应用数字滤波消除潮位短周期波动对确定海平面变化趋势的影响[J].水科学进展,1998,9(4):356-360. |
| |
| 作者姓名： | 杨清书 沈焕庭 |
| |
| 作者单位： | 1.广州中山大学河口海岸研究所 广州510275; |
| |
| 摘 要： | 由一元线性回归分析的正则方程计算表明,在验潮记录较短的客观条件下,验潮序列中的周期波动对确定海平面变化趋势的影响是显着的.着重讨论采用数字滤波方法消除周期小于4年的短周期波动对确定海平面变化趋势的影响,并设计了最平滤波器,其通带截止频率对应的周期为4年,即应用最平滤波器对月均验潮序列进行低通滤波,基本上可消除周期小于4年的短周期波动对确定海平面变化趋势的影响.
|
| 关 键 词： | 短序列 周期波动 海平面 数字滤波 |
| 收稿时间： | 1997-04-30 |
Elimination of the Influence of High Frequency Components on the Determination of Secular Trends of Sea Level Changes |
| |
| Yang Qingshu,Shen Huanting,Liu Xingcheng.Elimination of the Influence of High Frequency Components on the Determination of Secular Trends of Sea Level Changes[J].Advances in Water Science,1998,9(4):356-360. |
| |
| Authors: | Yang Qingshu Shen Huanting Liu Xingcheng |
| |
| Institution: | 1.Institute of Estuarine & Coastal Research, Zhongshan University, Guangzhou 510275;2.Institute of Estuarine & Coastal Research, East China Normal University, Shanghai 200062 |
| |
| Abstract: | The normal equation of linear regression is used to calculate the effects of high frequency components on the determination of secular trend of relative sea level(RSL).It shows that the periodic variation components(with period from several months to 18.61 years)have significant effects on the determination of secular trend of the short-time gaugerecords.The maximum flat filter which cut-off period is 4-year has been designed to filter out the high frequency components(with period less than 4 years)of monthly mean sea level.Secular trends of RSL are determ ined by the linear regression of low-passed gauge records. |
| |
| Keywords: | short time series periodic variation sea level change digital filtering |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
