美国东部近岸海流观测资料的初步分析  

PRELIMINARY ANALYSIS OF THE SEA-CURRENT DATA OBSERVED AT THE SEA NEAR EAST COAST OF THE UNITED STATES

作　　者：叶英[1] 董波[1] 

机构地区：[1]海军海洋水文气象中心,北京100073

出　　处：《海洋预报》2005年第1期22-30,共9页Marine Forecasts

摘　　要：本文使用最大熵谱分析对美国东海岸28°～42°N之间的海流流速实测数据进行功率谱分析,识别在序列资料中的周期振动,探讨该海区近岸潮流以及非潮流波动的基本规律和性质.分析结果表明,美国东海岸以半日潮振动为主,低频振动也十分明显,且能量较全日潮波动的能量大.A detailed description on the basic principle of maximum entropy analysis method is introduced,and the power spectra of sea-current data observed from 28°N to 42°N on east coast of the United States are analyzed by using maximum entropy method.This study found the periodic oscillation in the time-sequence data,revealed the basic regulation and character of the tide currents and non-tide current waves in the area.The analysis results show that semi-diurnal tide waves are predominant at the sea near east coast of the United States,low-frequency oscillation is very obvious too,and their energy is larger than diurnal tide waves.

关 键 词：熵 功率谱 傅立叶变换 美国 近岸海流 波谱分析 

分 类 号：P731.21[天文地球—海洋科学]