Timetable of high tide and low tide in 2023

Timetable of high tide and low tide in Tianjin in 2023;

(at 1 day 16) Early tide: 0: 48; Late tide: 13: 12.

(Grade 2 and 17) Early Tide:1:36; Late tide: 14:00.

(Grade 3 and Grade 18) Early Tide: 2: 24; Late tide: 14:48.

(Grade 4, 19) Early Tide: 3:12; Late tide: 15:36.

(fifth day, twentieth day) morning tide: 4: 00; Late tide: 16:24.

(sixth day, twenty-first) morning tide: 4: 48; Late tide: 17: 12.

(Seventh, 22nd) Early Tide: 5: 36; Late tide: 18:00.

(eighth, twenty-third) morning tide: 6: 24; Late tide: 18:48.

(9th and 24th) Early Tide: 7:12; Late tide: 19:36.

(10, 25th) Early tide: 8: 00; Evening tide: 20: 24.

The spring tide is the tide with the maximum period when the sun and the moon meet (that is, the new moon and the moon). Due to the lag of the ocean, the astronomical tides of ocean tides are generally about one and a half days after the new moon and the full moon, that is, about the second, third, seventeenth and eighteenth days of the lunar calendar. At this time, the sun, the earth and the moon are in the same direction, and the gravity of the sun and the moon on the earth is superimposed, which leads to the spring tide.

Main causes of high tide and low tide:

The causes of high tide and low tide are related to both the moon and the sun. Its principle is that the moon and the sun are attractive to the earth, which is what people often hear about tidal force.

Tidal force is an integral force, which is not completely determined by gravity, but because the gravity of different parts of the earth is not exactly the same in size and direction, there will be a force difference and a direction difference, which will cause two "differences" in tidal force.

The process of tides is different every day, because the relative positions of the moon, the sun and the earth are constantly changing. This phenomenon is called tidal inequality, and there are four main phenomena: half-moon inequality, moon inequality, declination inequality and daytime inequality.