| 词条 | Land and water hemispheres | ||||||||||||||||||||||||
| 释义 |
| align = right | direction = horizontal | width = 180 | image1 = hemisphere land.png | width1 = 180 | alt1 = The Land Hemisphere | caption1 = The Land Hemisphere | image2 = hemisphere water.png | width2 = 180 | alt2 = The Water Hemisphere | caption2 = The Water Hemisphere }}{{multiple image | align = right | direction = horizontal | width = 180 | footer = Land Hemisphere top, Water Hemisphere bottom | footer_align = center | image3 = hemispheres land water1.png | width3 = 180 | alt3 = Land Hemisphere top, Water Hemisphere bottom | image4 = hemispheres land water2.png | width4 = 180 | alt4 = Land Hemisphere top, Water Hemisphere bottom }} The land and water hemispheres of Earth, sometimes capitalised as 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. Determinations of the hemispheres vary slightly. One determination places the centre of the Land Hemisphere at {{Coord|47|13|N|1|32|W|format=dms|type:landmark_region:FR_scale:10000|display=inline}} (in the city of Nantes, France).[1] The center of the water hemisphere is the antipodal point of the center of the land hemisphere, and is therefore located at {{coord|47|13|S|178|28|E|format=dms|type:landmark_region:FR_scale:10000|display=inline}}, near New Zealand's Bounty Islands in the Pacific Ocean.[1] An alternative assignment determines the centre of the Land Hemisphere to be at {{coord|47.411667|N|2.620833|W|format=dms|type:landmark_region:FR_scale:10000|display=inline}} (in île Dumet near Saint-Nazaire, France).[2][3] Distribution of continentsThe Land Hemisphere has the substantial majority of the planet's land, including Europe, Africa, North America, nearly all of Asia and most of South America. However, even in the Land Hemisphere, the ocean area still slightly exceeds the land area. The Land hemisphere is almost identical to the hemisphere containing the greatest human population.[4] The Water Hemisphere has only about one-eighth of the world's land,[1] including Australia, New Zealand, Hawaii, the Maritime Southeast Asia, and the Southern Cone of the Americas. Antarctica is solely within the water hemisphere, though sources differ as to whether it is considered land for the purposes of calculation. Most of the Pacific Ocean and the Indian Ocean are on the water hemisphere. Proportionately, the Water Hemisphere is approximately 89% water, 6% dry land and 5% polar ice cap.[1] The table below follows the assignments of Alphonse Berget of land to the two hemispheres.[2]
See also
References1. ^1 2 3 {{cite journal |last=Boggs |first=Samuel Whittemore |date=December 1945 |title=This Hemisphere |journal=Journal of Geography |volume=44 |issue=9 |pages=345–355 |doi=10.1080/00221344508986498}} {{Hemispheres of the Earth}}2. ^1 {{cite journal |first=Alphonse |last=Berget |title=Répartition géographique des Océans (détermination du pôle continental) |publisher=Annales de l'Institut océanographique |language=French |date=1913 |volume=V |series=10 |url=https://archive.org/stream/annalesdelinstit05instuoft#page/n587/mode/2up/}} 3. ^{{cite web|url=http://www.france-secret.com/dumet_art.htm |archiveurl=https://web.archive.org/web/20131110192441/http://www.france-secret.com/dumet_art.htm |archivedate=10 November 2013 |title=L’ILE DUMET: LE NOMBRIL DU MONDE |work=France Secret |language=French |deadurl=yes |df= }} 4. ^{{cite web|title=How Much of Humanity is on Your Side of World?|url=http://brilliantmaps.com/human-hemisphere/|website=Brilliant Maps|accessdate=12 December 2016|date=27 September 2015}} 3 : Physical geography|Hemispheres of Earth|Oceans |
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