noun
solar tide
Technical term in oceanography and astronomy for tides caused by the gravitational pull of the Sun.
太陽潮は月による潮汐と比べて小さい。
The solar tide is smaller compared to the tide caused by the moon.
Refers to the lunar tide, the tide caused by the Moon's gravity, as opposed to the solar tide.
Compound of 太陽 (taiyō, 'sun') and 潮 (chō, 'tide').