Tides may have a very high range in bays or estuaries.
Tides, the generally twice-daily rise and fall of sea levels, are caused by Earth's rotation and the gravitational effects of the Moon and, to a lesser extent, of the Sun. Deep-sea currents, known together as the global conveyor belt, carry cold water from near the poles to every ocean and significantly influencing Earth's climate.
Surface currents are the water currents that are produced by the atmosphere's currents and its winds blowing over the surface of the water, producing wind waves, setting up through drag slow but stable circulations of water, as in the case of the ocean sustaining deep-sea ocean currents. The surface of water interacts with the atmosphere, exchanging properties such as particles and temperature, as well as currents. The ocean moderates Earth's climate and has important roles in the water, carbon, and nitrogen cycles. The water also contains salts of magnesium, calcium, potassium, and mercury, amongst many other elements, some in minute concentrations. The most abundant solid dissolved in seawater is sodium chloride. The salinity of water bodies varies widely, being lower near the surface and the mouths of large rivers and higher in the depths of the ocean however, the relative proportions of dissolved salts vary little across the oceans. the Mediterranean Sea), or certain large, nearly landlocked, saltwater lakes (e.g.
Particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. The sea commonly refers to the ocean, the wider body of seawater. Algeria, Angola, Argentina, Australia, Bahrain, Benin, Bermuda, Bolivia, Botswana, Brazil, Brunei Darussalam, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Cape Verde Islands, Central African Republic, Chad, Chile, Colombia, Comoros, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Djibouti, Ecuador, Egypt, Equatorial Guinea, Eritrea, Ethiopia, Falkland Islands (Islas Malvinas), Gabon Republic, Gambia, Germany, Ghana, Greenland, Guinea, Guinea-Bissau, Guyana, Hong Kong, Indonesia, Iraq, Israel, Japan, Jordan, Kenya, Kuwait, Laos, Lebanon, Lesotho, Liberia, Macau, Madagascar, Malawi, Malaysia, Mali, Mauritania, Mauritius, Mayotte, Mexico, Morocco, Mozambique, Namibia, New Zealand, Niger, Nigeria, Oman, Paraguay, Peru, Philippines, Puerto Rico, Qatar, Republic of the Congo, Rwanda, Saint Helena, Saint Pierre and Miquelon, Saudi Arabia, Senegal, Seychelles, Sierra Leone, Singapore, Somalia, South Africa, Suriname, Swaziland, Taiwan, Tanzania, Thailand, Togo, Tunisia, Turkey, Uganda, United Arab Emirates, United Kingdom, Vietnam, Virgin Islands (U.S.Coastal sea waves at Paracas National Reserve, Ica, PeruĪ sea is a large body of salty water.
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