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Most water in Earth's atmosphere and crust comes from saline seawater, while fresh water accounts for nearly 1% of the total. The vast bulk of the water on Earth is saline or salt water, with an average salinity of 35‰ (or 3.5%, roughly equivalent to 34 grams of salts in 1 kg of seawater), though this varies slightly according to the amount of runoff received from surrounding land.
The entire ocean, containing 97% of Earth's water, spans 70.8% of Earth's surface, [8] making it Earth's global ocean or world ocean. [23] [25] This makes Earth, along with its vibrant hydrosphere a "water world" [43] [44] or "ocean world", [45] [46] particularly in Earth's early history when the ocean is thought to have possibly covered Earth ...
The remaining 30% is ground water, 1% surface water (covering only 2.8% of Earth's land) [198] and other small forms of fresh water deposits such as permafrost, water vapor in the atmosphere, biological binding, etc. [199] [200]
Strictly speaking, a sea is a body of water (generally a division of the world ocean) partly or fully enclosed by land, [4] though "the sea" refers also to the oceans. Saline water covers approximately 361,000,000 km 2 (139,000,000 sq mi) and is customarily divided into several principal oceans and smaller seas, with the ocean covering ...
The lake covers nearly 14,000 acres (57 km 2) with 190 miles (310 km) of shoreline touching three counties. [6] The lake is an average of 23 feet (7.0 m) deep with an estimated volume of 1.35 × 10 10 cubic feet (3.82 × 10 8 m 3 ).
Coordinates: 1]: Basin countries: List of bordering countries (not drainage basin), ports: Surface area: 85,133,000 km 2 (32,870,000 sq mi) [2] North Atlantic: 41,490,000 km 2 (16,020,000 sq mi), South Atlantic 40,270,000 km 2 (15,550,000 sq mi) [3]: Average depth: 3,646 m (11,962 ft) [3]: Max. depth: Puerto Rico Trench 8,376 m (27,480 ft) [4]: Water volume: 310,410,900 km 3 (74,471,500 cu mi ...
Water vapor thus has a scale height a fraction of that of the bulk atmosphere, [21] [22] [23] as the water condenses and exits, primarily in the troposphere, the lowest layer of the atmosphere. [24] Carbon dioxide (CO 2) and methane, being well-mixed in the atmosphere, tend to rise above water vapour.
Water vapor concentration for this gas mixture is 0.4%. Water vapor is a greenhouse gas in the Earth's atmosphere, responsible for 70% of the known absorption of incoming sunlight, particularly in the infrared region, and about 60% of the atmospheric absorption of thermal radiation by the Earth known as the greenhouse effect. [25]