摘要
计算半日潮特征海域平均大潮高潮面的关键在于,一是应有足够长时段且满足精度的潮汐实测或预报数据;二是应尽可能准确选定大潮时刻高潮位。针对大潮时刻高潮位在时间选取上的困难,从月相物理意义出发,证明了当日月黄经差值约为0°时,大潮时刻对应月相朔;当日月黄经差值约为180°时,大潮时刻对应月相望。提出并实现了顾及半日潮龄值及逐时日、月黄经差的平均大潮高潮面计算方法。
The key to the calculation of mean high water springs at semidiurnal tide sea waters,is the tide observation or prediction data in the adequate period of time,along with the possible exact selection of high water springs.In order to solve the difficulty of selecting the time of spring tide,the difference between ecliptic longitude of the sun and ecliptic longitude of the moon is calculated. It is proved that the time of spring tide corresponds to the newmoon when the ecliptic-longitude difference of the day is about 0°,and the full moon when the difference is about 180°. Thus a practical algorithm for calculating the mean high water springs at semidiurnal tide sea waters is developed in this paper.
出处
《海洋测绘》
CSCD
2016年第2期21-25,共5页
Hydrographic Surveying and Charting
基金
国家自然科学基金(41474012
41374108
41476087
41576105)
国家重大科学仪器设备开发专项(2011YQ12004503)
国防973计划(613219)
关键词
海岸线
半日潮
平均大潮高潮面
月相
半日潮龄
日黄经
月黄经
coastline
semidiurnal tide
mean high water spring
phase of the moon
age of semidiurnal tide
ecliptic longitude of the sun
ecliptic longitude of the moon
