DENSITY OF OCEAN WATER FULL

When the leading edge of the incoming tide forms a wave/ waves of water that travel up a river or a narrow bay against the direction of the river or bay’s current, it is called a tidal bore. Tidal Boreīest-Selling Courses Loved by IAS aspirants Tidal ranges are much less than the average during this period. Unusual high and low tides occur during this time.Īphelion: It is the position where the earth is farthest from the sun (around July 4 th). Perihelion: It is the position where the earth is closest to the sun (around January 3 rd). Tidal ranges will be much less than the average during this period. During this period, unusually high and low tides occur.Īpogee: When the moon’s orbit is farthest from the earth, it is called an apogee. Perigee: When the moon’s orbit is closest to the Earth, it is called a perigee. They also occur twice in a month- during the first quarter moon and the last quarter moon. The tides during this period will be lower than the normal which are called the neap tides. Thus, the gravitational forces of the sun and the moon tend to counteract one another.

Neap Tides: Normally after seven days of a spring tide, the sun and the moon become at a right angle to each other concerning the earth.

DENSITY OF OCEAN WATER FULL

They occur twice a month on the full moon (Poornima) and the other on the new moon (Amavasya). Spring Tides: When the sun, the moon, and the earth are in a straight line, the height of the tide will be higher than normal.

Tides based on the sun, the moon, and the earth’s positions They generally occur along the west coast of North America.ī. Mixed Tide: Tides having variations in height are known as mixed tides.Diurnal Tides: Only one high tide and one low tide each day.Semi-diurnal Tide: They are the most common tidal pattern, featuring two high tides and two low tides each day.It is the period between high tide and low tide during which water flows away from the shore. Ebb Tide is the receding or outgoing tide.It is thus the period between a low tide and a high tide (i.e., the rising time).A flow tide or a flood tide is a rising tide or incoming tide which results in a high tide.The regular interval between two high or two low tides is 12 hours and 25 minutes.Īlso read: Deep Water Circulation Flow Tide and Ebb Tide.When the tide is channeled between islands or into bays and estuaries, they are termed Tidal Currents.The highest tides in the world occur in the Bay of Fundi in Canada.Sun’s gravitational pull and the centrifugal force due to the rotation of the earth are the other forces that act along with the moon’s gravitational pull.The moon’s gravitational pull to a great extent is the major cause of the occurrence of tides (the moon’s gravitational attraction is more effective on the Earth than that of the sun).Note: The water movements that are caused by the meteorological effects like the said above are called surges and they are not regular like tides.They are vertical movements of water and are different from movements of ocean water caused by meteorological effects like the winds and atmospheric pressure changes.Tides are the periodical rise and fall of sea levels, once or twice a day, caused by the combined effects of the gravitational forces exerted by the sun, the moon, and the rotation of the earth.A wave has two major parts: the raised part is called the crest while the low point is called the trough.In a wave, the movement of each water particle is circular.The size and strength of waves depend on factors like wind speed, duration, and fetch (the distance over which the wind blows).This energy for the waves is provided by the wind.They are the energy, not the water as such, which moves across the ocean surface.Waves are a kind of horizontal movements of the ocean water.Waves are nothing but oscillatory movements that result in the rise and fall of water’s surface.Waves and ocean currents are horizontal movements of ocean waters while the tide is a kind of vertical movement of the ocean water.

Density of ocean water