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The result is that parts of the Pacific Coast can have 3 low tides a day. Similarly, there are areas in the world like the Gulf of Mexico or the South China Sea that have only one high tide a day. Mechanical tide clocks used on the Pacific Coast must be adjusted frequently, often as much as weekly, and are not useful in diurnal areas (those ...
Tides are driven by the relative positions of the Earth, Sun, Moon, land formations, and relative location on Earth. In the lunar month, the highest tides occur roughly every 14 days, at the new and full moons, when the gravitational pull of the Moon and the Sun are in alignment. These highest tides in the lunar cycle are called spring tides.
The California Current is part of the North Pacific Gyre, a large swirling current that occupies the northern basin of the Pacific. The related California Current Conservation Complex is a grouping of federally-designated marine protected areas that have been on the UNESCO list of tentative World Heritage Sites since 2017, which includes the ...
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Joel Walker Hedgpeth (September 29, 1911 – July 28, 2006) was a marine biologist, environmentalist and author.He was an expert on the marine arthropods known as sea spiders (Pycnogonida), and on the seashore plant and animal life of southern and northern California; he co-authored Between Pacific Tides, the definitive guide to California intertidal organisms.
Because of tidal resonance in the funnel-shaped bay, the tides that flow through the channel are very powerful. In one half-day tidal cycle, about 100 billion tonnes (110 billion short tons ) of water flow in and out of the bay, which is twice as much as the combined total flow of all the rivers of the world over the same period. [ 4 ]
Kingman Reef (/ ˈ k ɪ ŋ m ən /) is a largely submerged, uninhabited, triangle-shaped reef, geologically an atoll, 9.0 nmi (20 km) east-west and 4.5 nmi (8 km) north-south, [2] in the North Pacific Ocean, roughly halfway between the Hawaiian Islands and American Samoa.
San Francisco Bay is the second-largest estuary on the Pacific coast of the Americas, following the Salish Sea in Washington State and British Columbia, Canada. [ 7 ] The bay was navigable as far south as San Jose until the 1850s, when hydraulic mining released massive amounts of sediment from the rivers that settled in those parts of the bay ...