Hurricane Alley

Source: Wikipedia, the free encyclopedia.
This article is about the area of frequent tropical cyclone activity in the Atlantic Ocean. For other areas of frequent tropical cyclone activity, see Tropical cyclogenesis.
Atlantic hurricane tracks from 1851 to 2019

Hurricane Alley is an area of warm water in the

hurricane activity.[2][needs update
]

How hurricanes form

Main article: Tropical cyclogenesis
The warm waters of Hurricane Alley are depicted in orange.

Hurricanes form over

tropical waters in areas of high humidity, light winds, and warm sea surface temperatures. These areas are usually between the latitudes of 8° and 20° north.[3] The perfect temperature for a hurricane is approximately 26 °C. This temperature has been set as a standard. If the water is colder the hurricane will most likely weaken, but if the waters are warmer rapid growth can occur.[4]

The area between 10° and 20°N create the most hurricanes in a given season because of the warmer temperatures. Hurricanes do not form outside this range because the

Coriolis effect is not strong enough to create the tight circulation needed and above this range the temperatures are too cool.[5] The waters are only at the necessary temperatures from July until mid-October. In the Atlantic this is the height of the season
.

Since hurricanes rely on sea surface temperature, sometimes an initially active season becomes quiet later. This is because the hurricanes are so strong that they churn the waters and bring colder waters up from the deep. This creates an area of the sea the size of the hurricane, which has cooler waters, which can be 5–10 °C lower than before the hurricane. When a new hurricane moves over the cooler waters they have no fuel to continue to thrive, so they weaken or even die out.[6]

Historical trends

According to an

Mississippi Valley through the Gulf coast. Preliminary data from the northern Atlantic coast seem to support the Azores High hypothesis. A 3,000-year proxy record from a coastal lake in Cape Cod suggests that hurricane activity has increased significantly during the past 500–1,000 years, just as the Gulf coast was amid a quiescent period of the last millennium.[10]

See also

References

  1. ^ Goudzari, Sara (May 2, 2006). "Hurricane Alley Heats Up". LiveScience. Retrieved 9 September 2008.
  2. ^ "Hurricane Alley Heats Up". National Aeronautics and Space Administration. August 9, 2005. Retrieved 9 September 2008.
  3. ^ Steve Graham; Holli Riebeek (1 November 2006). "Hurricanes: The Greatest Storms on Earth". NASA. Retrieved 29 July 2013.
  4. ^ "Seeing into the Heart of a Hurricane". Earth Observatory. 12 October 2000.
  5. ^ "NWS JetStream - Tropical Cyclone Introduction". National Weather Service.
  6. ^ "Seeing into the Heart of a Hurricane". Earth Observatory. 12 October 2000.
  7. ^ Liu, Kam-biu (1999). Millennial-scale variability in catastrophic hurricane landfalls along the Gulf of Mexico coast. 23d Conf. on Hurricanes and Tropical Meteorology. Dallas, TX: Amer. Meteor. Soc. pp. 374–377.
  8. S2CID 140723229
    .
  9. S2CID 129650957
    .
  10. ^ Kam-biu Liu. "Millennial-scale Variability in Atlantic Hurricane Activities: Possible Links to the Hadley Circulation" (PDF). University of Louisiana.

External links

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