February 2009 10 Quanzhou high tide time

The fluctuation of tides is only related to the movement relationship between the earth and the moon and the observation position. The high tide during the day is called tide, and the high tide at night is called sunseeker. There are four types of tides, namely diurnal tide, semidiurnal tide, semidiurnal tide and semidiurnal tide. A semidiurnal tide means that the period of a tide is half a day, that is to say, there are two high tides and two low tides in a day, and a diurnal tide means that the period of a tide is one. The tidal cycle is different at different latitudes.

There is a popular method to calculate the high tide in the north, that is, the high tide on a certain day is two hours after the high tide on the previous day.

Grasping the law and time of seawater ebb and flow is very important for taking the coastline, which is related to the difficulty of the route and even whether some places can cross it.

The law of seawater fluctuation is: there are two high tides every day, with an interval of 12 hours. The high tide generally lasts for more than an hour before the low tide begins, and the low tide time is at least between the two high tides.

The time of high tide is different every day, and it is repeated every 15 days. Therefore, the climax of the next day was delayed by 0.8 hours (48 minutes) compared with the previous day. The daily high tide time can be calculated according to the lunar calendar date, and the calculation formula is as follows:

The first to fifteenth day of the lunar calendar: high tide time = date *0.8.

Lunar calendar 16 to 30: high tide time = (date-15)*0.8.

Mastering this rule, it should not be difficult to remember this formula. Here are some practical examples to illustrate this formula:

1) 2000/12/31Impulse Journey: The lunar calendar date is the sixth day, so the high tide time is 6*0.8=4.8, which means that the high tide time is 4: 48 in the morning and evening, so the time we take the coastline is after the low tide. Relatively speaking,

2) 200110/28, dignified and strong, leading the team to bend: lunar calendar date 12, so the high tide time is 12*0.8=9.6, which means the high tide time is 9: 36 in the morning and 9: 30 in the evening. And I took the same route in 2002/11.On the 18th day of the lunar calendar, the high tide time was (18- 15)*0.8=2.4, which means that the high tide time was at 2: 24 in the morning and afternoon, just in time for the low tide.

You may wish to recall your previous experience of walking the coastline and verify the formula; Calculate before going to the coastline next time, and you will be able to hit the road with clear thinking!

(Note: This formula is based on hearsay and my own experience, which needs further confirmation, especially how long the climax lasts. It's really hard to observe and judge. In addition, the size of the wind and waves will also have a certain impact on the difficulty of walking along the coastline. )