2,436 articles
Prince Gustav Channel
Prince Gustav Channel is an Antarctic strait separating James Ross and Vega Islands from Trinity Peninsula, discovered by Nordenskjöld's 1901-04 Swedish expedition, named for the later King Gustav V, and opened to navigation after its ice shelf collapsed in 1995.
Prince of Wales Strait
Prince of Wales Strait: Arctic channel between Banks and Victoria islands in Canada's Northwest Passage, discovered by Robert McClure in 1850, opening into Viscount Melville Sound; heavy multiyear ice limits transit.
Prince William Sound
Prince William Sound is a large glacial embayment of the Gulf of Alaska in south-central Alaska, near Cordova, Valdez, and Whittier, known for its tidewater glaciers, the 1989 Exxon Valdez oil spill, and the Barry Arm landslide-tsunami hazard.
Protector Shoal
Protector Shoal, a submarine seamount chain at 55°59'S 28°10'W, is the northernmost, most silicic volcano of the South Sandwich arc; its 1962 eruption produced a pumice raft that circumnavigated Antarctica.
Puerto Rico - Virgin Islands
Puerto Rico - Virgin Islands (FEOW ID 215) is a freshwater ecoregion of the Freshwater Ecoregions of the World framework, covering rivers of Puerto Rico, the Virgin Islands, and the British Virgin Islands, habitat type tropical and subtropical coastal rivers.
Puerto Rico Trench
Puerto Rico Trench (Brownson Deep): deepest place in the Atlantic Ocean at about 8,400 m, a Caribbean-North American plate boundary trench north of Puerto Rico with Earth's most negative gravity anomaly, -380 mGal, and major tsunami hazard.
Puget Sound
Puget Sound is a deep glacial fjord estuary in Washington state within the Salish Sea, the largest US estuary by volume, with two-layer exchange circulation, dissolved-oxygen impairment from nutrients, and major salmon, shellfish, and port economies.
Puget Sound region
Puget Sound region: northwestern Washington area around the glacial fjord-like estuary Puget Sound and the Salish Sea straits. 13 counties, Coast Salish tribes, 1854-56 treaties, Seattle metro GDP $487.8 billion (2023), 70-80% estuarine habitat lost.
Pui Pui (crocodile)
Pui Pui, female saltwater crocodile (Crocodylus porosus) found in Shan Pui River, Hong Kong, 2003; evaded hunters seven months, captured 2004, resident of Hong Kong Wetland Park since 2006.
Pulicat Lake
Pulicat Lake (Pulicat Lagoon) is India's second largest brackish water lagoon after Chilika, on the Coromandel Coast across Andhra Pradesh and Tamil Nadu, about 450–460 sq km, fed by the Swarnamukhi, Kalangi, and Arani rivers, hypersaline, and a major migratory bird and fishery habitat.
Pur
Pur (Пур), river in Yamalo-Nenets Autonomous Okrug, Russia; formed by the Pyakupur and Aivasedapur, flows 389 km (1,024 km with Pyakupur) north into Tazovskaya Guba, Kara Sea; basin 112,000 km², discharge 884 m³/s, navigable, gas-producing region.
Puritama Hot Springs
Puritama Hot Springs (Termas de Puritama) is a set of eight geothermal pools on the Puritama River in Chile's Atacama Desert, near San Pedro de Atacama.
Purus
Purus (Rio Purus), major whitewater tributary of the Amazon/Solimoes rising in Peru, about 3,380 km long, basin 375,458 km2, discharge ~8,500 m3/s; only major Amazonian tributary with an undammed watershed.
Put-in-Bay, Ohio
Put-in-Bay is a village on South Bass Island, Lake Erie, Ohio, three miles offshore. Known for the 1813 Battle of Lake Erie, Perry's 352-foot peace memorial, ferries, and tourism-only economy.
Putumayo
The Putumayo River, called the Içá in Brazil, is a roughly 1,600 km Amazon tributary rising in the Colombian Andes and draining parts of Colombia, Ecuador, Peru, and Brazil.
Pyaozero
Pyaozero (Пяозеро; Finnish Pääjärvi) is a large freshwater lake in northern Karelia, Russia, part of the Kumskoe reservoir system on the Kovda River and one of Europe's largest lakes.
Pyasina
Pyasina (Пясина), Arctic river in Krasnoyarsk Krai, Russia: 818 km from Lake Pyasino across the Taymyr Peninsula to Pyasina Bay of the Kara Sea; 182,000 km² basin, 354 km tidal reach, Norilsk-linked history.
Pyasino
Pyasino (Пясино), glacial lake in Krasnoyarsk Krai, Russia, 20 km north of Norilsk; 735 sq km, average depth 4 m; drains via the Pyasina River to the Kara Sea; heavily affected by Norilsk mining pollution.
Pyhäjärvi (lake, Finland)
Pyhäjärvi (Säkylän Pyhäjärvi) is a 155 km² shallow lake in southwestern Finland, its largest lake, a mesotrophic, highly productive vendace and whitefish fishery under protection since 1995.
Pyramid Lake (Los Angeles County, California)
Pyramid Lake (Los Angeles County) is a 1,360-acre State Water Project reservoir on Piru Creek formed by Pyramid Dam (1969–1973), serving Castaic Powerplant and offering boating, fishing, and camping near Castaic, California.
Pyramid Lake (Nevada)
Pyramid Lake (Nevada), also Cui-ui Pah, is a 453 km² terminal saline lake on the Pyramid Lake Paiute Reservation northeast of Reno, the largest remnant of Lake Lahontan, fed by the Truckee River, home to the endemic endangered cui-ui and record Lahontan cutthroat trout.
Qaidan
Qaidan (FEOW ecoregion 632) is a Palearctic freshwater ecoregion of temperate upland rivers in the Qaidam Basin, northeastern Tibetan Plateau, China, delineated by The Nature Conservancy and WWF (2008).
Qeshm Island
Qeshm Island (Jazira-ye Qeshm), the largest island in the Persian Gulf near the Strait of Hormuz, Iran; about 122 km long, home to the Hara mangroves, Qeshm UNESCO Global Geopark, and a free zone; struck by desalination-plant attacks and oil pollution in the 2026 Gulf war.
Qinghai (landform)
Qinghai Lake (青海湖), also known as Kukunor, is a closed-basin saline lake on the northeastern Qinghai–Tibet Plateau in Qinghai Province, China, formed about 2 million years ago and the largest lake in the country.
Qiongzhou Strait
The Qiongzhou Strait (琼州海峡) is a strait in southern China separating Hainan Island from the Leizhou Peninsula and linking the Beibu Gulf to the South China Sea.
Queen Charlotte Sound
Queen Charlotte Sound: name shared by a sound between Haida Gwaii and Vancouver Island, British Columbia (named 1786 for Queen Charlotte), and Tōtaranui, a drowned-valley sound in New Zealand's Marlborough Sounds named by Cook in 1770.
Quill Lakes
Quill Lakes: three saline lakes (Big, Middle/Mud, Little Quill) in east-central Saskatchewan, Canada's largest saline lake, a 1987 Ramsar site and major shorebird staging area, now merged by post-2004 flooding.
Quintana Roo - Motagua
Quintana Roo - Motagua is freshwater ecoregion 202 of the FEOW system, spanning Central America's Caribbean coast from the Yucatán Peninsula south to the Motagua River across four countries.
Ragay Gulf
Ragay Gulf: deep triangular embayment in southeastern Luzon, Philippines, between Quezon and Camarines Sur provinces; about 3,900 km2, 600 m deep, on the Philippine Fault, a Key Biodiversity Area and major fishing ground.
Rain water
Rain water: liquid precipitation, harvested from roofs and tanks as an alternative water supply. Naturally low in minerals but microbiologically variable; harvested rainwater often meets grey water, not drinking, standards.