Polar regions of Earth

Northern Hemisphere permafrost (permanently frozen ground) in purple

The polar regions of Earth, also known as Earth's frigid zones, are the regions of Earth surrounding its geographical poles (the North and South Poles). These regions are dominated by Earth's polar ice caps, the northern resting on the Arctic Ocean and the southern on the continent of Antarctica.

Terrestrial polar regions

Definitions

The Arctic has various definitions, including the region north of the Arctic Circle (currently Epoch 2010 at 66°33'44" N), or the region north of 60° north latitude, or the region from the North Pole south to the timberline. The Antarctic is usually defined as south of 60° south latitude, or the continent of Antarctica. The 1959 Antarctic Treaty uses the former definition.

The two polar regions are distinguished from the other two climatic and biomatic belts of Earth, a tropics belt near the equator, and two middle latitude regions located between the tropics and polar regions.

Climate

Polar regions receive less intense solar radiation than the other parts of Earth because the sun's energy arrives at an oblique angle, spreading over a larger area, and also travels a longer distance through the Earth's atmosphere in which it may be absorbed, scattered or reflected, which is the same thing that causes winters to be colder than the rest of the year in temperate areas.

The axial tilt of the Earth has a major effect on climate of the polar regions. Since the polar regions are the farthest from the equator, they receive the least amount of sunlight and are therefore frigid. The large amount of ice and snow also reflects a large part of what little sunlight the Polar regions receive, contributing to the cold. Polar regions are characterized by the polar climate, extremely cold temperatures, heavy glaciation wherever there is sufficient precipitation to form permanent ice, and extreme variations in daylight hours, with twenty-four hours of daylight in summer, and complete darkness at mid-winter.

Circumpolar Arctic region

North polar region polar bears

There are many settlements in Earth's north polar region. Countries with claims to Arctic regions are: the United States (Alaska), Canada, Denmark (Greenland), Norway, Finland, Sweden, Iceland, and Russia. Arctic circumpolar populations often share more in common with each other than with other populations within their national boundaries. As such, the northern polar region is diverse in human settlements and cultures.

Antarctica and the Southern sea

South polar region penguin

The southern polar region has no permanent human habitation. McMurdo Station is the largest research station in Antarctica, run by the United States. Other notable stations include Palmer Station and Amundsen–Scott South Pole Station (United States), Esperanza Base and Marambio Base (Argentina), Scott Base (New Zealand), and Vostok Station (Russia).

While there are no indigenous human cultures, there is a complex ecosystem, especially along Antarctica's coastal zones. Coastal upwelling provides abundant nutrients which feeds krill, a type of marine crustacea, which in turn feeds a complex of living creatures from penguins to blue whales.

References

External links

Regions of Africa
North	Mediterranean Gibraltar Arc Greater Middle East MENA Middle East Maghreb Barbary Coast Barbara Ancient Libya Atlas Mountains (Middle Atlas) Sahara Western Sahara Sahel Eastern Mediterranean Egypt Upper Egypt Middle Egypt Lower Egypt Cataracts of the Nile Bashmur Nubia Lower Nubia Nile Valley Nile Delta Darfur Gulf of Aqaba Sub-Saharan
East	Aethiopia Swahili coast East African Rift Great Rift Valley Afar Triangle Danakil Desert Danakil Alps Albertine Rift Virunga Mountains Gregory Rift Valley Southern Rift Valley Rift Valley lakes African Great Lakes Mittelafrika Horn of Africa Ethiopian Highlands Gulf of Aden Gulf of Tadjoura Sudan (region) Sudanian Savanna East African montane forests Sub-Saharan
Central	Negroland Guinea region Gulf of Guinea Cape Lopez Mayombe Igboland Mbaise Maputaland Pool Malebo Congo Basin Chad Basin Congolese rainforests Ouaddaï highlands Ennedi Plateau Sub-Saharan
West	Pepper Coast Gold Coast Slave Coast Ivory Coast Cape Palmas Cape Mesurado Negroland Guinea region Gulf of Guinea Sudanian Savanna Niger Basin Guinean Forests of West Africa Sudan (region) Niger Delta Inner Niger Delta Sub-Saharan
South	Madagascar Central Highlands (Madagascar) Northern Highlands Rhodesia North South Thembuland Succulent Karoo Nama Karoo Bushveld Highveld Fynbos Cape Floristic Region Kalahari Desert Okavango Delta False Bay Hydra Bay Sub-Saharan
Anglophone Africa Francophone Africa Lusophone Africa Arabophone Africa Sub-Saharan Africa Tropical Africa Islands

Regions of North America
Canada	Eastern Canada Western Canada Canadian Prairies Northern Canada Atlantic Canada French Canada English Canada Acadia Acadian Peninsula Quebec City–Windsor Corridor Peace River Country Cypress Hills Palliser's Triangle Canadian Shield Interior Alaska-Yukon lowland taiga Newfoundland (island) Vancouver island Gulf Islands Strait of Georgia Canadian Arctic Archipelago Labrador Peninsula Gaspé Peninsula Avalon Peninsula Bay de Verde Peninsula Brodeur Peninsula Melville Peninsula Bruce Peninsula Banks Peninsula (Nunavut) Cook Peninsula Gulf of Boothia Georgian Bay Hudson Bay James Bay Greenland
United States	Pacific Northwest Inland Northwest Northeast New England Commonwealth West Midwest Upper Midwest Mid-Atlantic Mountain States Intermountain West Basin and Range Province Oregon Trail Mormon Corridor Calumet Region Southwest Old Southwest Llano Estacado Frontier Strip Central United States Tallgrass prairie South South Central Deep South Upland South Four Corners East Coast West Coast Gulf Coast Third Coast Coastal states Eastern United States Appalachia Trans-Mississippi Great North Woods Great Plains Interior Plains Great Lakes Great Basin Great Basin Desert Acadia Ozarks Ark-La-Tex Waxhaws Siouxland Twin Tiers Driftless Area Palouse Piedmont Atlantic coastal plain Outer Lands Black Dirt Region Blackstone Valley Piney Woods Rocky Mountains Mojave Desert The Dakotas The Carolinas Shawnee Hills San Fernando Valley Tornado Alley North Coast Lost Coast Emerald Triangle San Francisco Bay Area San Francisco Bay North Bay (San Francisco Bay Area) East Bay (San Francisco Bay Area) Silicon valley Interior Alaska-Yukon lowland taiga Gulf of Mexico Lower Colorado River Valley Sacramento–San Joaquin River Delta Yukon–Kuskokwim Delta Colville Delta Arkansas Delta Mobile–Tensaw River Delta Mississippi Delta Mississippi River Delta Columbia River Estuary Great Basin High Desert Monterey Peninsula Upper Peninsula of Michigan Lower Peninsula of Michigan Virginia Peninsula Keweenaw Peninsula Middle Peninsula Delmarva Peninsula Alaska Peninsula Kenai Peninsula Niagara Peninsula Beringia Belt regions Bible Belt Black Belt Corn Belt Cotton Belt Frost Belt Rice Belt Rust Belt Sun Belt Snow Belt
Mexico	Northern Mexico Baja California Peninsula Gulf of California Colorado River Delta Gulf of Mexico Soconusco Tierra Caliente La Mixteca La Huasteca Bajío Valley of Mexico Mezquital Valley Sierra Madre de Oaxaca Yucatán Peninsula Basin and Range Province
Central	Western Caribbean Zone Isthmus of Panama Gulf of Panama Pearl Islands Azuero Peninsula Mosquito Coast
Caribbean	West Indies Antilles Greater Antilles Lesser Antilles Leeward Leeward Antilles Windward Lucayan Archipelago Southern Caribbean
Aridoamerica Mesoamerica Oasisamerica Northern Middle Anglo Latin French Hispanic American Cordillera Ring of Fire LAC

Regions of South America
North	Caribbean South America West Indies Los Llanos The Guianas Amazon Basin Amazon rainforest Gulf of Paria Paria Peninsula Paraguaná Peninsula Orinoco Delta
South	Tierra del Fuego Patagonia Pampas Pantanal Gran Chaco Chiquitano dry forests Valdes Peninsula
West	Andes Tropical Andes Wet Andes Dry Andes Pariacaca mountain range Altiplano Atacama Desert
East	Amazon basin Atlantic Forest Caatinga Cerrado
Latin Hispanic American Cordillera Ring of Fire LAC

Regions of Asia
Central	Greater Middle East Aral Sea Aralkum Desert Caspian Sea Dead Sea Sea of Galilee Transoxiana Turan Greater Khorasan Ariana Khwarezm Sistan Kazakhstania Eurasian Steppe Asian Steppe Kazakh Steppe Pontic–Caspian steppe Mongolian-Manchurian grassland Wild Fields Yedisan Muravsky Trail Ural Ural Mountains Volga region Idel-Ural Kolyma Transbaikal Pryazovia Bjarmaland Kuban Zalesye Ingria Novorossiya Gornaya Shoriya Tulgas Iranian plateau Altai Mountains Pamir Mountains Tian Shan Badakhshan Wakhan Corridor Wakhjir Pass Mount Imeon Mongolian Plateau Western Regions Taklamakan Desert Karakoram Trans-Karakoram Tract Siachen Glacier
North	Inner Asia Northeast Far East Russian Far East Okhotsk-Manchurian taiga Extreme North Siberia Baikalia (Lake Baikal) Transbaikal Khatanga Gulf Baraba Steppe Kamchatka Peninsula Amur Basin Yenisei Gulf Yenisei Basin Beringia Sikhote-Alin
East	Japanese archipelago Northeastern Japan Arc Sakhalin Island Arc Korean Peninsula Gobi Desert Taklamakan Desert Greater Khingan Mongolian Plateau Inner Asia Inner Mongolia Outer Mongolia China proper Manchuria Outer Manchuria Inner Manchuria Northeast China Plain Mongolian-Manchurian grassland North China Plain Yan_Mountains Kunlun Mountains Liaodong Peninsula Himalayas Tibetan Plateau Tibet Tarim Basin Northern Silk Road Hexi Corridor Nanzhong Lingnan Liangguang Jiangnan Jianghuai Guanzhong Huizhou Wu Jiaozhou Zhongyuan Shaannan Ordos Loop Loess Plateau Shaanbei Hamgyong Mountains Central Mountain Range Japanese Alps Suzuka Mountains Leizhou Peninsula Gulf of Tonkin Yangtze River Delta Pearl River Delta Yenisei Basin Altai Mountains Wakhan Corridor Wakhjir Pass
West	Greater Middle East MENA Middle East Red Sea Caspian Sea Mediterranean Sea Zagros Mountains Persian Gulf Pirate Coast Strait of Hormuz Greater and Lesser Tunbs Al-Faw Peninsula Gulf of Oman Gulf of Aqaba Gulf of Aden Balochistan Arabian Peninsula Najd Hejaz Tihamah Eastern Arabia South Arabia Hadhramaut Arabian Peninsula coastal fog desert Tigris–Euphrates Mesopotamia Upper Mesopotamia Lower Mesopotamia Sawad Nineveh plains Akkad (region) Babylonia Canaan Aram Eber-Nari Suhum Eastern Mediterranean Mashriq Kurdistan Levant Southern Levant Transjordan Jordan Rift Valley Levantine Sea Golan Heights Hula Valley Gaza Strip West Bank Galilee Gilead Judea Samaria Arabah Anti-Lebanon Mountains Sinai Peninsula Arabian Desert Syrian Desert Fertile Crescent Azerbaijan Syria Palestine Iranian plateau Armenian Highlands Caucasus Caucasus mountains Greater Caucasus Lesser Caucasus North Caucasus South Caucasus Kur-Araz Lowland Lankaran Lowland Alborz Absheron Peninsula Anatolia Cilicia Cappadocia Alpide belt
South	Greater India Indian subcontinent Himalayas Hindu Kush Western Ghats Eastern Ghats Ganges Basin Ganges Delta Pashtunistan Punjab Balochistan Kashmir Kashmir Valley Pir Panjal Range Thar Desert Indus Valley Indus River Delta Indus Valley Desert Indo-Gangetic Plain Eastern coastal plains Western Coastal Plains Meghalaya subtropical forests Lower Gangetic plains moist deciduous forests Northwestern Himalayan alpine shrub and meadows Doab Bagar region Great Rann of Kutch Little Rann of Kutch Deccan Plateau Coromandel Coast Konkan False Divi Point Hindi Belt Ladakh Aksai Chin Gilgit-Baltistan Baltistan Shigar Valley Karakoram Saltoro Mountains Siachen Glacier Bay of Bengal Gulf of Khambhat Gulf of Kutch Gulf of Mannar Trans-Karakoram Tract Wakhan Corridor Wakhjir Pass Lakshadweep Andaman and Nicobar Islands Andaman Islands Nicobar Islands Maldive Islands Alpide belt
Southeast	Mainland Indochina Malay Peninsula Maritime Peninsular Malaysia Sunda Islands Greater Sunda Islands Lesser Sunda Islands Indonesian Archipelago Timor New Guinea Bonis Peninsula Papuan Peninsula Huon Peninsula Huon Gulf Bird's Head Peninsula Gazelle Peninsula Philippine Archipelago Luzon Visayas Mindanao Leyte Gulf Gulf of Thailand East Indies Nanyang Alpide belt
Asia-Pacific Tropical Asia Ring of Fire

Regions of Europe
North	Nordic Northwestern Scandinavia Scandinavian Peninsula Fennoscandia Baltoscandia Sápmi West Nordic Baltic Baltic Sea Gulf of Bothnia Gulf of Finland Iceland Faroe Islands
East	Danubian countries Prussia Galicia Sambia Peninsula Amber Coast Curonian Spit Izyum Trail Lithuania Minor Nemunas Delta Baltic Baltic Sea Vyborg Bay Lokhaniemi Southeastern Balkans Aegean Islands Gulf of Chania North Caucasus Greater Caucasus Kabardia European Russia Southern Russia
Central	Baltic Baltic Sea Alpine states Alpide belt Mitteleuropa Visegrád Group
West	Benelux Low Countries Northwest British Isles English Channel Channel Islands Cotentin Peninsula Normandy Brittany Gulf of Lion Iberia Al-Andalus Baetic System Pyrenees Alpide belt
South	Italian Peninsula Insular Italy Tuscan Archipelago Aegadian Islands Iberia Al-Andalus Baetic System Gibraltar Arc Southeastern Mediterranean Crimea Donbass Sloboda Ukraine Alpide belt
Germanic Romance Celtic Slavic countries Uralic European Plain Eurasian Steppe Pontic–Caspian steppe Wild Fields Pannonian Basin Great Hungarian Plain Little Hungarian Plain Eastern Slovak Lowland Volhynia Karelia East Karelia Karelian Isthmus

Regions of Oceania
Australasia	Gulf of Carpentaria New Guinea Bonis Peninsula Papuan Peninsula Huon Peninsula Huon Gulf Bird's Head Peninsula Gazelle Peninsula New Zealand South Island North Island Coromandel Peninsula Zealandia New Caledonia Solomon Islands (archipelago) Vanuatu Kula Gulf Australia Capital Country Eastern Australia Lake Eyre basin Murray–Darling basin Northern Australia Nullarbor Plain Outback Southern Australia Maralinga Sunraysia Great Victoria Desert Gulf of Carpentaria Gulf St Vincent Lefevre Peninsula Fleurieu Peninsula Yorke Peninsula Eyre Peninsula Mornington Peninsula Bellarine Peninsula Mount Henry Peninsula
Melanesia	Islands Region Bismarck Archipelago Solomon Islands Archipelago Fiji New Caledonia Papua New Guinea Vanuatu
Micronesia	Caroline Islands Federated States of Micronesia Palau Guam Kiribati Marshall Islands Nauru Northern Mariana Islands Wake Island
Polynesia	Easter Island Hawaiian Islands Cook Islands French Polynesia Austral Islands Gambier Islands Marquesas Islands Society Islands Tuamotu Kermadec Islands Mangareva Islands Samoa Tokelau Tonga Tuvalu
Ring of Fire

Polar regions
Antarctic	Antarctic Peninsula East Antarctica West Antarctica Eklund Islands Ecozone Extreme points Islands
Arctic	Arctic Alaska British Arctic Territories Canadian Arctic Archipelago Finnmark Greenland Northern Canada Northwest Territories Nunavik Nunavut Russian Arctic Sakha Sápmi Yukon North American Arctic

Earth's oceans and seas
Arctic Ocean	Amundsen Gulf Barents Sea Beaufort Sea Chukchi Sea East Siberian Sea Greenland Sea Gulf of Boothia Kara Sea Laptev Sea Lincoln Sea Prince Gustav Adolf Sea Pechora Sea Queen Victoria Sea Wandel Sea White Sea
Atlantic Ocean	Adriatic Sea Aegean Sea Alboran Sea Archipelago Sea Argentine Sea Baffin Bay Balearic Sea Baltic Sea Bay of Biscay Bay of Bothnia Bay of Campeche Bay of Fundy Black Sea Bothnian Sea Caribbean Sea Celtic Sea English Channel Foxe Basin Greenland Sea Gulf of Bothnia Gulf of Finland Gulf of Lion Gulf of Guinea Gulf of Maine Gulf of Mexico Gulf of Saint Lawrence Gulf of Sidra Gulf of Venezuela Hudson Bay Ionian Sea Irish Sea Irminger Sea James Bay Labrador Sea Levantine Sea Libyan Sea Ligurian Sea Marmara Sea Mediterranean Sea Myrtoan Sea North Sea Norwegian Sea Sargasso Sea Sea of Åland Sea of Azov Sea of Crete Sea of the Hebrides Thracian Sea Tyrrhenian Sea Wadden Sea
Indian Ocean	Andaman Sea Arabian Sea Bali Sea Bay of Bengal Flores Sea Great Australian Bight Gulf of Aden Gulf of Aqaba Gulf of Khambhat Gulf of Kutch Gulf of Oman Gulf of Suez Java Sea Laccadive Sea Mozambique Channel Persian Gulf Red Sea Timor Sea
Pacific Ocean	Arafura Sea Banda Sea Bering Sea Bismarck Sea Bohai Sea Bohol Sea Camotes Sea Celebes Sea Ceram Sea Chilean Sea Coral Sea East China Sea Gulf of Alaska Gulf of Anadyr Gulf of California Gulf of Carpentaria Gulf of Fonseca Gulf of Panama Gulf of Thailand Gulf of Tonkin Halmahera Sea Koro Sea Mar de Grau Molucca Sea Moro Gulf Philippine Sea Salish Sea Savu Sea Sea of Japan Sea of Okhotsk Seto Inland Sea Shantar Sea Sibuyan Sea Solomon Sea South China Sea Sulu Sea Tasman Sea Visayan Sea Yellow Sea
Southern Ocean	Amundsen Sea Bellingshausen Sea Cooperation Sea Cosmonauts Sea Davis Sea D'Urville Sea King Haakon VII Sea Lazarev Sea Mawson Sea Riiser-Larsen Sea Ross Sea Scotia Sea Somov Sea Weddell Sea
Endorheic basins	Aral Sea Caspian Sea Dead Sea Sea of Galilee Salton Sea
Book Category

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.