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| Pacific Coast of the Americas | |
|---|---|
| Name | Pacific Coast of the Americas |
| Caption | Pacific coastline from Alaska to Tierra del Fuego |
| Location | North America, Central America, South America |
| Length | approx. 25,000 km |
| Countries | United States, Canada, Mexico, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Ecuador, Peru, Chile, Argentina |
Pacific Coast of the Americas The Pacific Coast of the Americas is the continuous maritime margin that stretches from the Bering Strait and Alaska southward along British Columbia, Washington (state), Oregon, California, Baja California, through Mexican Pacific Coast, the Central American Pacific Coast and along the western shores of South America—Colombia, Ecuador, Peru, Chile—to Tierra del Fuego. This coastal arc encompasses major ports like Seattle, Vancouver, Los Angeles, San Diego, Guatemala City, Managua, Panama City, Buenaventura, Guayaquil, Callao (Peru), and Valparaiso and intersects continental features such as the Rocky Mountains, Sierra Nevada (United States), Sierra Madre Occidental, Andes, and the Coast Range (British Columbia). The region links transoceanic routes eastward via the Panama Canal and westward to Asia and the Pacific Islands.
The coastline includes distinct subregions: the Arctic Alaska and Aleutian Islands arc, Gulf of Alaska, the Pacific Northwest, the California Current System, the Baja California Peninsula, the Gulf of California, the Mexican Riviera, the Central American Seaboard, the Colombian Chocó, the Ecuadorian coast, the Peruvian coast, and the Chilean coast. Major bays and gulfs include the Gulf of Alaska, Monterey Bay, San Francisco Bay, Gulf of Tehuantepec, Gulf of Nicoya, Gulf of Panama, and Gulf of Guayaquil. Offshore features include the Continental Shelf (North America), Peru–Chile Trench vicinity, Cocos Plate interaction zones, and island groups such as Revillagigedo Islands, Galápagos Islands, Juan Fernández Islands, and Easter Island.
The margin is dominated by the Pacific Plate interacting with the North American Plate, Juan de Fuca Plate, Cocos Plate, Nazca Plate, and the Scotia Plate, producing subduction zones like the Cascadia subduction zone and the Peru–Chile Trench. Volcanic arcs include the Aleutian Arc, Cascade Range, Trans-Mexican Volcanic Belt, and the Andean Volcanic Belt, featuring volcanoes such as Mount St. Helens, Mount Rainier, Popocatépetl, Cotopaxi, Chimborazo, and Ojos del Salado. The region records great earthquakes including the 1964 Alaska earthquake, the 2010 Chile earthquake, the 1906 San Francisco earthquake, and the 2011 Tōhoku earthquake and tsunami as a model for subduction impacts. Tectonic processes shaped coastal morphology—emergent coasts, fjords in British Columbia and Alaska, and the narrow continental shelf off Peru and Chile.
Oceanographic forces feature the California Current, the Peru Current (Humboldt Current), the Alaska Current, and seasonal influences like El Niño–Southern Oscillation events and La Niña. The coastal climate ranges from polar maritime in Alaska to temperate rainforests in British Columbia and the Pacific Northwest, Mediterranean climates in Central California, arid deserts in Baja California and northern Chile (Atacama Desert), and tropical wet-dry regimes in Central America and western Colombia. Upwelling zones off California and Peru drive high productivity supporting krill and fish assemblages studied by institutions such as the Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, CICESE, and Instituto del Mar del Perú.
Coastal ecosystems include mangrove forests along Mexico and Central America coasts, kelp forests in California and Chile, temperate rainforests in British Columbia and Alaska with species studied by the Smithsonian Tropical Research Institute, and hyperarid coastal deserts hosting endemic flora in Atacama. Marine biodiversity hotspots include the Galápagos Islands, Corcovado National Park adjacency, Gulf of California endemism, and the Peruvian upwelling fisheries sustaining anchoveta and sardine stocks. Iconic fauna include gray whale, humpback whale, blue whale, killer whale, sea otter, Galápagos finches, Andean condor, marine iguana, dusky dolphin, and albatross species frequenting Easter Island and the Juan Fernández Islands.
Indigenous cultures along the coast include the Tlingit, Haida, Kwakwakaʼwakw, Nuu-chah-nulth, Coast Salish, Chumash, Miwok, Tongva, Maya, Nahua, Zapotec, Mixtec, Bribri, Ngäbe, Kuna, Embera, Miskito, Wounaan, Awá, Quechua, Aymara, Mapuche, Rapa Nui (Rapa Nui people), Chinchorro culture, Valdivia culture, and Moche culture. Archaeological sites like Paisley Caves, Monte Verde, El Baúl, Chan Chan, Caral, and Huaca del Sol attest to coastal adaptation, maritime foraging, and craft traditions including navigation and canoe building exemplified by dugout canoe artifacts curated by museums such as the Field Museum and the Museo Larco.
European contact began with expeditions of Vasco Núñez de Balboa, Ferdinand Magellan, Juan Rodríguez Cabrillo, Francisco de Orellana, Pedro Álvares Cabral (contextual Atlantic voyages), Sebastián Vizcaíno, Francisco Pizarro, Sir Francis Drake, and later colonial administrations by the Spanish Empire and the British Empire. Colonial establishments included San Diego (presidio), Los Angeles, San Francisco, Acapulco, Veracruz (Atlantic link), Panama City (old), Quito, Lima, Santiago (Chile), and the naval significance underscored by events like the Battle of Valdivia and treaties such as the Treaty of Tordesillas influencing claims. Independence movements involved figures like Simón Bolívar, José de San Martín, Miguel Hidalgo, and Bernardo O'Higgins reshaping sovereignty and coastal trade networks.
Economic activities include commercial ports operated by authorities like the Port of Los Angeles, Port of Long Beach, Port of Vancouver, Port of Seattle, Port of Manzanillo (Mexico), Manzanillo (Colombia), and Port of Callao, aquaculture operations for salmon and shrimp farms, offshore petroleum extraction in Gulf of Mexico adjacent basins and Peru/Ecuador coastal fields, fisheries targeting anchoveta, tuna, salmon, and crab, tourism centered on destinations such as Baja California Sur, Cancún (Atlantic contrast), Galápagos Islands, Torres del Paine, recreational industries like surfing communities in Huntington Beach, Jeffreys Bay (Global South comparison), and shipping corridors linked to the Trans-Pacific Partnership negotiations and Asia-Pacific Economic Cooperation summits.
Coastal challenges encompass overfishing crises exemplified by the Peruvian anchoveta collapse, oil spills such as the Exxon Valdez oil spill precedent, marine pollution addressed by conventions like the International Convention for the Prevention of Pollution from Ships in practice, habitat loss of mangrove and kelp systems, coral threats in Galápagos and Gulf of California, and climate-driven sea level rise impacting cities like Miami (comparison), San Francisco, and Valparaíso. Conservation responses include protected areas such as Galápagos National Park, Channel Islands National Park, Corcovado National Park, Manuel Antonio National Park, marine protected areas under Convention on Biological Diversity guidance, restoration programs by organizations like the World Wildlife Fund, Conservation International, The Nature Conservancy, and regional research by Scripps Institution of Oceanography and Smithsonian Institution informing policy instruments like Ramsar Convention listings and bilateral accords including U.S.–Mexico Transboundary Aquifer discussions.
Category:Coasts of the Americas