Explain the relationship between the polar jet stream and development of cyclones
What will be the ideal response?
ANSWER: In order for middle-latitude cyclones to develop and intensify there must be upper-level diverging air above the surface storm. The polar jet stream can provide such areas of divergence. The region of strongest winds in the jet stream is known as a jet stream core, or jet streak. When the polar jet stream flows in a wavy west-to-east pattern, a jet streak tends to form in the trough of the jet, where pressure gradients are tight. The curving of the jet stream coupled with the changing wind speeds around the jet streak produces regions of strong convergence and divergence of air along the flanks of the jet.
You might also like to view...
A vernacular region or area that is perceived as part of a local identity is best represented by
A) the Pacific Northwest. B) Duval County. C) 0 degrees longitude. D) Tin Pan Alley. E) the Boston-Washington DC megalopolis.
Which of the following colors has the longest wavelength?
A) violet B) green C) orange D) blue E) red
The 1989 oil spill that harmed Prince William Sound in Alaska was due to which of the following?
A) It leaked from a ruptured pipeline B) It resulted from drilling on the sea floor C) It was deliberately released from a refinery D) An earthquake triggered natural seepage E) An oil tanker ran aground
A forecast of an extended period of dry weather would be made for a region beneath
a. ?an upper-level trough. b. ?the polar jet stream. c. ?a cold pool of air aloft. d. ?an upper-level ridge. e. ?a shortwave trough.