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- Hydrosphere abstract "The hydrosphere (from Greek ὕδωρ - hydōr, "water" and σφαῖρα - sphaira, "sphere") in physical geography describes the combined mass of water found on, under, and over the surface of a planet. Igor Shiklomanov, the man selected by the United Nations to do its world inventory of water resources, estimated that there are 1386 million cubic kilometres of water on earth. This includes water in liquid and frozen forms in groundwaters, glaciers, oceans, lakes and streams. Saline water account for 97.5% of this amount. Fresh water accounts for only 2.5%. Of this fresh water 68.7% is in the "form of ice and permanent snow cover in the Arctic, the Antarctic, and in the mountainous regions. Next, 29.9% exists as fresh groundwaters. Only 0.26% of the total amount of fresh waters on the Earth are concentrated in lakes, reservoirs and river systems where they are most easily accessible for our economic needs and absolutely vital for water ecosystems." The total mass of the Earth's hydrosphere is about 1.4 × 1018 tonnes, which is about 0.023% of the Earth's total mass. About 20 × 1012 tonnes of this is in the Earth's atmosphere (the volume of one tonne of water is approximately 1 cubic metre). Approximately 75% of the Earth's surface, an area of some 361 million square kilometers (139.5 million square miles), is covered by ocean. The average salinity of the Earth's oceans is about 35 grams of salt per kilogram of sea water (3.5%)".
- Hydrosphere thumbnail World_water_distribution.png?width=300.
- Hydrosphere wikiPageExternalLink index.html.
- Hydrosphere wikiPageID "145753".
- Hydrosphere wikiPageRevisionID "604803572".
- Hydrosphere hasPhotoCollection Hydrosphere.
- Hydrosphere subject Category:Aquatic_ecology.
- Hydrosphere subject Category:Hydrology.
- Hydrosphere subject Category:Physical_geography.
- Hydrosphere subject Category:Structure_of_the_Earth.
- Hydrosphere subject Category:Water.
- Hydrosphere comment "The hydrosphere (from Greek ὕδωρ - hydōr, "water" and σφαῖρα - sphaira, "sphere") in physical geography describes the combined mass of water found on, under, and over the surface of a planet. Igor Shiklomanov, the man selected by the United Nations to do its world inventory of water resources, estimated that there are 1386 million cubic kilometres of water on earth. This includes water in liquid and frozen forms in groundwaters, glaciers, oceans, lakes and streams.".
- Hydrosphere label "Hidrosfera".
- Hydrosphere label "Hidrosfera".
- Hydrosphere label "Hydrosfeer".
- Hydrosphere label "Hydrosfera".
- Hydrosphere label "Hydrosphere".
- Hydrosphere label "Hydrosphäre".
- Hydrosphere label "Hydrosphère".
- Hydrosphere label "Idrosfera".
- Hydrosphere label "Гидросфера".
- Hydrosphere label "غلاف الأرض المائي".
- Hydrosphere label "水圈".
- Hydrosphere label "水圏".
- Hydrosphere sameAs Hydrosféra.
- Hydrosphere sameAs Hydrosphäre.
- Hydrosphere sameAs Υδρόσφαιρα.
- Hydrosphere sameAs Hidrosfera.
- Hydrosphere sameAs Hidrosfera.
- Hydrosphere sameAs Hydrosphère.
- Hydrosphere sameAs Hidrosfer.
- Hydrosphere sameAs Idrosfera.
- Hydrosphere sameAs 水圏.
- Hydrosphere sameAs 수권.
- Hydrosphere sameAs Hydrosfeer.
- Hydrosphere sameAs Hydrosfera.
- Hydrosphere sameAs Hidrosfera.
- Hydrosphere sameAs m.012k1d.
- Hydrosphere sameAs Q83169.
- Hydrosphere sameAs Q83169.
- Hydrosphere wasDerivedFrom Hydrosphere?oldid=604803572.
- Hydrosphere depiction World_water_distribution.png.
- Hydrosphere isPrimaryTopicOf Hydrosphere.
