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| Strait of Taiwan | |
|---|---|
| Name | Strait of Taiwan |
| Other names | Taiwan Strait |
| Location | East Asia |
| Type | Strait |
| Countries | People's Republic of China; Republic of China (Taiwan) |
| Length | 180 km (approx.) |
| Width | 130–180 km |
| Max depth | ~200 m |
| Basin countries | China, Taiwan |
Strait of Taiwan The Strait of Taiwan is the shallow, semienclosed sea corridor separating Mainland China and Taiwan (Republic of China), linking the East China Sea with the South China Sea. It lies between the provinces of Fujian and the island of Taiwan, forming a maritime boundary adjacent to the East Asian continental shelf and proximate to the Ryukyu Islands, Penghu Islands, and Pescadores archipelago. The strait is central to regional maritime trade and naval strategy and has shaped interactions among Imperial China, Ming dynasty, Qing dynasty, Dutch East India Company, Kingdom of Tungning, Empire of Japan, the Republic of China, and the People's Republic of China.
The strait extends roughly from the vicinity of the East China Sea in the north to the South China Sea in the south, bounded westward by Fujian coastlines including cities like Fuzhou, Quanzhou, and Xiamen, and eastward by the western coast of Taiwan near Hsinchu, Taichung, and Kaohsiung. Nearby island groups include the Pescadores (Penghu County), Kinmen, and Matsu Islands, each tied to different political entities such as Republic of China (Taiwan) and adjacent to PRC-administered Fujian. Important ports on either side include Keelung, Kaohsiung, Xiamen, and Fuzhou, which connect to international hubs like Shanghai, Hong Kong, Busan, Nagoya, and Manila. The strait lies over the East China Sea Shelf and intersects sea lanes used by carriers from Japan Maritime Self-Defense Force, United States Navy, People's Liberation Army Navy, and commercial fleets such as Maersk, COSCO, and Evergreen Marine.
The basin sits atop the continental shelf shaped by tectonic processes involving the Eurasian Plate and interactions with the Philippine Sea Plate. Seabed features include broad shallow areas, submarine ridges, and channels influenced by Quaternary sea-level changes tied to glacial cycles studied by researchers at institutions like Academia Sinica and Chinese Academy of Sciences. Sediment provenance involves rivers such as the Min River and episodic inputs from typhoon-driven erosion. Oceanographers from Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, and Xiamen University have documented semidiurnal tides, internal waves, and stratification similar to features observed in the South China Sea basin. Bathymetry typically ranges to about 200 m depth, with turbidity maximum zones comparable to those in the Yellow Sea and Bohai Sea.
The strait's hydrography is governed by the East Asian monsoon system, seasonal currents like the Kuroshio Current extension, and episodic influences from tropical cyclones such as Typhoon Haiyan analogs. Winter northeasterlies drive cooler, saltier surface waters toward the South China Sea, while summer southwesterlies and the South China Sea Summer Monsoon promote warmer inflows from the Philippine Sea. Freshwater fluxes derive from mainland rivers including the Min River and runoff from Taiwan's central mountain range, altering stratification and nutrient budgets studied by teams at National Taiwan University and Fuzhou University. Seasonal upwelling and vertical mixing affect primary production and fisheries linked to phenomena researched under programs at IOC UNESCO and regional marine institutes.
The strait supports coastal and pelagic ecosystems including mudflats, seagrass beds, and continental shelf fisheries exploited by fleets from China, Taiwan, Japan, and Vietnam. Key species include commercially important fishes like mackerel, anchovy, and squid as well as invertebrates targeted by fisheries such as shrimp and crab. Migratory seabirds link to wetlands recognized by organizations like Ramsar Convention listings elsewhere in the region. Marine mammals—dolphins, porpoises, and occasional whales—use the corridor during seasonal movements noted by NGOs such as WWF and researchers from Ocean Conservancy. Benthic habitats face pressure from trawling, coastal reclamation near Xiamen, Kaohsiung, and pollution incidents tracked by agencies like Environmental Protection Administration (Taiwan) and Ministry of Ecology and Environment (PRC).
Historically the strait was a conduit for migration, trade, and conflict involving seafaring polities from the Song dynasty and Ming dynasty through the Qing dynasty era, the Dutch East India Company presence, and the Sino-Japanese War (1894–1895). It figured in maritime commerce connecting to the Silk Road (maritime) and colonial networks including Portuguese Empire, Spanish East Indies, and later British Empire trading through Canton and Shanghai. Twentieth-century events—First World War naval patterns, Second World War Pacific campaigns, the Chinese Civil War, and the Cold War naval standoffs—shaped control and legal assertions by the Republic of China and the People's Republic of China. Contemporary human uses include artisanal and industrial fisheries, aquaculture near Penghu, port development at Keelung and Xiamen, offshore wind farms tied to companies like Ørsted and local energy agencies, and tourism to islands such as Kinmen and Penghu County.
Major international shipping routes traverse the strait, carrying container traffic between hubs like Shanghai, Hong Kong, Singapore, and Los Angeles operated by carriers including Maersk Line, CMA CGM, and Evergreen Marine. Ferry services connect cross-strait destinations historically between Xiamen and Kinmen and from Taiwan to the Penghu archipelago, run by operators registered under Maritime and Port Bureau (Taiwan) and counterpart agencies in Fujian. Offshore navigation hazards include shallow shoals and typhoon seasons; maritime safety is coordinated through regional authorities and search-and-rescue frameworks engaging International Maritime Organization standards and bilateral contacts such as Cross-Strait Service Trade Agreement-era arrangements.
The strait is a focal point of strategic competition involving the United States, People's Republic of China, and Republic of China (Taiwan), with implications for alliances including United States–Taiwan relations, US–Japan alliance, and Quadrilateral Security Dialogue-relevant planning. Naval transits by the United States Navy's Seventh Fleet and deployments by the People's Liberation Army Navy have triggered diplomatic protests tied to sovereignty claims asserted by both Kuomintang and Chinese Communist Party-era policies. Regional security discourse features organizations such as ASEAN and treaties like the Treaty of San Francisco contextually, while international law instruments under the United Nations Convention on the Law of the Sea inform rights of navigation, exclusive economic zones, and potential disputes involving continental shelf claims and resource exploitation monitored by think tanks like RAND Corporation and Asia-Pacific Center for Security Studies.