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Typhoon Parma (left) and Melor (right) interacting with each other in the Philippine Sea on October 6, 2009.. The Fujiwhara effect, sometimes referred to as the Fujiwara effect, Fujiw(h)ara interaction or binary interaction, is a phenomenon that occurs when two nearby cyclonic vortices move around each other and close the distance between the circulations of their corresponding low-pressure areas.
This is due to increasing Coriolis force closer to the poles, and which is zero at the equator. [ 2 ] [ 3 ] [ 4 ] One associated phenomenon often seen with low-latitude cyclones is the equatorial westerly wind burst , which allows for sufficient shear vorticity on both sides of the equator to support tropical cyclogenesis. [ 5 ]
A tropical cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world. [4] [5] The systems generally have a well-defined center which is surrounded by deep atmospheric convection and a closed wind circulation at the surface. [4]
All hurricanes in the northern hemisphere have one thing in common: they spin counterclockwise. The direction is caused by the Coriolis effect.
Weirdly enough, every hurricane you see spins counterclockwise, and you’ll never see one in the Southern Hemisphere. In fact, in the United States, this is the one city that has the highest ...
A Kelvin wave is a wave in the ocean, a large lake or the atmosphere that balances the Earth's Coriolis force against a topographic boundary such as a coastline, or a waveguide such as the equator. A feature of a Kelvin wave is that it is non-dispersive , i.e., the phase speed of the wave crests is equal to the group speed of the wave energy ...
Surface-level sea temperatures have to be at least 80 degrees for a hurricane to form, Anderson said. The ocean waters along the West Coast are typically a chilly 50 to 65 degrees.
Nyberg et al. reconstructed Atlantic major hurricane activity back to the early eighteenth century and found five periods averaging 3–5 major hurricanes per year and lasting 40–60 years, and six others averaging 1.5–2.5 major hurricanes per year and lasting 10–20 years. These periods are associated with the Atlantic multidecadal ...