semidiurnal tide

The lunar atmospheric semidiurnal tide at middle and lower thermosphere ( MLT) over Wuhan has seasonal and height variations. Both of the eastward and northward components of the lunar atmospheric semidiurnal tide reach the maximum values in January, and during July-August, there is secondary peak.

武汉中层和低热层的大气太阴半日潮汐有季节变化，东向和北向分量均在1月份有最大值，在7-8月份期间，有次最大值。

It is also found that the dominant tidal wave in the East China Sea is semidiurnal tide components especially M_2, while it in the South China Sea is diurnal tide components.

在东中国海基本以半日潮为主，尤其是M2占优，而在南海基本以全日潮为主。

The following main conclusions are gotten as follows: 1. The lunar atmospheric semidiurnal tide at middle and lower-thermosphere over Wuhan varies with season and height.

得出的主要结论有：1、武汉中层和低热层中大气太阴半日潮汐随季节和高度变化。

Mean low water of ordinary spring tide The diurnal springs correspond to the semidiurnal neaps and vice versa.

平均一般大潮低潮面全日潮大潮对应于半日潮小潮，反之亦然。

The semidiurnal tide reaches its maximun amplitude 24 m/ s at about 93 km at the beginning of April.

半日潮的最大值24m/s出现在4月初约93km处。

A tentative regression analysis of lowest normal low water in the semidiurnal tide areas

半日潮区理论深度基准面回归分析初探