native sea

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Crater Lake National Park In Oregon, USA
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Havasu Falls In Arizona, USA
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Florida beach, U.S.A 😳

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In the process of moisture circulation, the quality of water changes: during evaporation, salty seawater turns into fresh, and polluted seawater is purified. Part of the water is used to hydrate rocks and is excluded from the cycle.

The sea level is rising, the reasons for which include the melting of continental glaciers and the thermal expansion of water caused by global warming.

A gulf is a part of the sea that goes deep into the land, but has a free exchange of water with the main part of the sea. The hydrological and hydrochemical conditions of the bay are identical to the conditions of the sea, of which they are a part.

High tide occurs when the Moon passes through the meridian of a given place. The same thing happens simultaneously on the opposite side of the Earth. So, if the Moon passes through the zero meridian, then the tides are observed on the 0° and 180° meridians, and the ebb tides are 90° long in both hemispheres.

The surface of the seas is in constant motion. In ancient times, the causes of these phenomena were explained by the actions of the deities: the anger of Poseidon, the games of the Nereids, the monsters of Scylla and Charybdis. Sea water movements are very complex.

On average, with a temperature change of 1 °C, the speed of sound changes by 4.4 m/s, with an increase in salinity by 1 ‰ — by 1.2 m/s, with an increase in depth by 100 m — by 1.75 m/s.

The speed of sound in water does not depend on its frequency and height and ranges from 1,450 m/s to 1,570 m/s, and with increasing temperature, salinity, and pressure (i.e., depth), this value increases, but most under the influence of temperature.

Depending on the number of continents whose shores the sea washes, internal seas are divided into intercontinental (Mediterranean and Red Seas) and intracontinental (Yellow, White, Black Seas, etc.).

There are different classifications of seas. Classification under maritime law does not coincide with oceanographic classification.