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Land and water hemispheres

The land hemisphere and water hemisphere are the hemispheres of Earth containing the largest possible total areas of land and ocean, respectively. By definition (assuming that the entire surface can be classed as either "land" or "ocean"), the two hemispheres do not overlap.

Land hemisphere
Water hemisphere
Front-view equal-area maps of each hemisphere
Side-view equal-area maps (land hemisphere top, water hemisphere bottom)

Determinations of the hemispheres vary slightly. One determination places the centre of the land hemisphere at 47°13′N 1°32′W / 47.217°N 1.533°W / 47.217; -1.533 (in the city of Nantes, France).[1] The centre of the water hemisphere is the antipode of the centre of the land hemisphere, and is therefore located at 47°13′S 178°28′E / 47.217°S 178.467°E / -47.217; 178.467 (near New Zealand's Bounty Islands in the Pacific Ocean).

An alternative assignment determines the centre of the land hemisphere to be at 47°24′42″N 2°37′15″W / 47.411667°N 2.620833°W / 47.411667; -2.620833 (in Île Dumet [fr] near Piriac-sur-Mer, France).[2][3] The centre of the water hemisphere is located at 47°24′42″S 177°22′45″E / 47.411667°S 177.379167°E / -47.411667; 177.379167 (also near New Zealand's Bounty Islands in the Pacific Ocean). In comparison the geographic center of the Pacific Ocean, the main ocean of the water hemisphere, is further north-east, in eastern Kiribati south of Kiritimati, just west from Starbuck Island at 4°58′S 158°45′W / 4.97°S 158.75°W / -4.97; -158.75.[4] The oceanic pole of inaccessibility, known as Point Nemo and for being the so-called spacecraft cemetery, lies east at 49°01′38″S 123°26′04″W / 49.0273°S 123.4345°W / -49.0273; -123.4345 (Oceanic Pole of Inaccessibility).

Distribution of geographical features edit

The land hemisphere has the substantial majority of the planet's land (80.1 percent), including nearly all of Asia (with Maritime Southeast Asia being the only notable exception) and most of South America. Africa, Europe, and North America are solely within the land hemisphere. However, even in the land hemisphere, the water area still slightly exceeds the land area (with 53 percent water to 47 percent land). This hemisphere is almost identical to the hemisphere containing the greatest human population.[5] The land hemisphere also contains most of Earth's inland waters, including the African Great Lakes, Eurasia's Caspian Sea, the Great Lakes of North America, and Lake Baikal in Siberia.

The water hemisphere has only about one-fifth of the world's land, including Easter Island, the Hawaiian Islands, other Pacific islands, Maritime Southeast Asia, the southern tip of the Indochinese Peninsula, the southern portion of the Malay Peninsula, the Ryukyu Islands, Taiwan, and the Southern Cone of the Americas. Antarctica, Australia, and Zealandia are solely within the water hemisphere. Some sources[1] further divide land into "dry land" and "ice cap". Antarctica provides the water hemisphere with the majority of Earth's ice.

Most of the Pacific Ocean and the Indian Ocean, and the whole Southern Ocean, are in the water hemisphere. Proportionately, the water hemisphere is approximately 89 percent water (almost all pertaining to the World Ocean), 6 percent dry land and 5 percent polar ice cap.[1]

The table below shows Alphonse Berget's estimates of the land area in each continent in the land and water hemispheres.[2]

Continent Land hemisphere
km2 (sq mi)
Water hemisphere
km2 (sq mi)
Africa 29,818,400 (11,512,949) 0 (0)
Americas 34,955,670 (13,496,460) 3,391,010 (1,309,276)
Antarctica 0 (0) 13,120,000 (5,065,660)
Asia 40,897,241 (15,790,513) 3,245,649 (1,253,152)
Europe 9,732,250 (3,757,643) 0 (0)
Oceania 0 (0) 8,958,630 (3,458,946)
Total land area 115,403,561 (44,557,564) 28,715,289 (11,087,035)

See also edit

References edit

  1. ^ a b c Boggs, Samuel Whittemore (December 1945). "This Hemisphere". Journal of Geography. 44 (9): 345–355. doi:10.1080/00221344508986498.
  2. ^ a b Berget, Alphonse (1913). "Répartition géographique des Océans (détermination du pôle continental)". Annales de l'Institut océanographique. 10 (in French). V.
  3. ^ . France Secret (in French). Archived from the original on 10 November 2013.
  4. ^ "International Journal of Oceans and Oceanography, Volume 15 Number 1, 2021, Determining the Areas and Geographical Centers of Pacific Ocean and its Northern and Southern Halves, pp 25-31, Arjun Tan". Research India Publications. Retrieved 2022-07-18.
  5. ^ "How Much of Humanity is on Your Side of World?". Brilliant Maps. 27 September 2015. Retrieved 12 December 2016.

land, water, hemispheres, land, hemisphere, water, hemisphere, hemispheres, earth, containing, largest, possible, total, areas, land, ocean, respectively, definition, assuming, that, entire, surface, classed, either, land, ocean, hemispheres, overlap, land, he. The land hemisphere and water hemisphere are the hemispheres of Earth containing the largest possible total areas of land and ocean respectively By definition assuming that the entire surface can be classed as either land or ocean the two hemispheres do not overlap Land hemisphereWater hemisphereFront view equal area maps of each hemisphere Side view equal area maps land hemisphere top water hemisphere bottom Determinations of the hemispheres vary slightly One determination places the centre of the land hemisphere at 47 13 N 1 32 W 47 217 N 1 533 W 47 217 1 533 in the city of Nantes France 1 The centre of the water hemisphere is the antipode of the centre of the land hemisphere and is therefore located at 47 13 S 178 28 E 47 217 S 178 467 E 47 217 178 467 near New Zealand s Bounty Islands in the Pacific Ocean An alternative assignment determines the centre of the land hemisphere to be at 47 24 42 N 2 37 15 W 47 411667 N 2 620833 W 47 411667 2 620833 in Ile Dumet fr near Piriac sur Mer France 2 3 The centre of the water hemisphere is located at 47 24 42 S 177 22 45 E 47 411667 S 177 379167 E 47 411667 177 379167 also near New Zealand s Bounty Islands in the Pacific Ocean In comparison the geographic center of the Pacific Ocean the main ocean of the water hemisphere is further north east in eastern Kiribati south of Kiritimati just west from Starbuck Island at 4 58 S 158 45 W 4 97 S 158 75 W 4 97 158 75 4 The oceanic pole of inaccessibility known as Point Nemo and for being the so called spacecraft cemetery lies east at 49 01 38 S 123 26 04 W 49 0273 S 123 4345 W 49 0273 123 4345 Oceanic Pole of Inaccessibility Distribution of geographical features editThe land hemisphere has the substantial majority of the planet s land 80 1 percent including nearly all of Asia with Maritime Southeast Asia being the only notable exception and most of South America Africa Europe and North America are solely within the land hemisphere However even in the land hemisphere the water area still slightly exceeds the land area with 53 percent water to 47 percent land This hemisphere is almost identical to the hemisphere containing the greatest human population 5 The land hemisphere also contains most of Earth s inland waters including the African Great Lakes Eurasia s Caspian Sea the Great Lakes of North America and Lake Baikal in Siberia The water hemisphere has only about one fifth of the world s land including Easter Island the Hawaiian Islands other Pacific islands Maritime Southeast Asia the southern tip of the Indochinese Peninsula the southern portion of the Malay Peninsula the Ryukyu Islands Taiwan and the Southern Cone of the Americas Antarctica Australia and Zealandia are solely within the water hemisphere Some sources 1 further divide land into dry land and ice cap Antarctica provides the water hemisphere with the majority of Earth s ice Most of the Pacific Ocean and the Indian Ocean and the whole Southern Ocean are in the water hemisphere Proportionately the water hemisphere is approximately 89 percent water almost all pertaining to the World Ocean 6 percent dry land and 5 percent polar ice cap 1 The table below shows Alphonse Berget s estimates of the land area in each continent in the land and water hemispheres 2 Continent Land hemispherekm2 sq mi Water hemispherekm2 sq mi Africa 29 818 400 11 512 949 0 0 Americas 34 955 670 13 496 460 3 391 010 1 309 276 Antarctica 0 0 13 120 000 5 065 660 Asia 40 897 241 15 790 513 3 245 649 1 253 152 Europe 9 732 250 3 757 643 0 0 Oceania 0 0 8 958 630 3 458 946 Total land area 115 403 561 44 557 564 28 715 289 11 087 035 See also editGeographical centre of Earth Ocean worldReferences edit a b c Boggs Samuel Whittemore December 1945 This Hemisphere Journal of Geography 44 9 345 355 doi 10 1080 00221344508986498 a b Berget Alphonse 1913 Repartition geographique des Oceans determination du pole continental Annales de l Institut oceanographique 10 in French V L ILE DUMET LE NOMBRIL DU MONDE France Secret in French Archived from the original on 10 November 2013 International Journal of Oceans and Oceanography Volume 15 Number 1 2021 Determining the Areas and Geographical Centers of Pacific Ocean and its Northern and Southern Halves pp 25 31 Arjun Tan Research India Publications Retrieved 2022 07 18 How Much of Humanity is on Your Side of World Brilliant Maps 27 September 2015 Retrieved 12 December 2016 Retrieved from https en wikipedia org w index php title Land and water hemispheres amp oldid 1189014299, wikipedia, wiki, book, books, library,

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