On breakdowns of the Westerlies

Illari, L.; Malguzzi, P.; Speranza, Antonio

doi:10.1080/03091928108243671

The transition of the middle-latitude atmospheric circulation from “zonal” to “meridional” type is known to occur in connection with the growth of local disturbances characterized by a very low mobility. This process is very frequent over Europe, where it leads usually to a blocking situation. In this paper, the physical conditions that determine the growth and the motion of localized disturbances (wave packets) in a rotating (β-plane) westerly flow are analysed for various mechanisms of instability. The results are discussed in the light of what is known from available data.

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Titolo:	On breakdowns of the Westerlies
Autori:	Illari L. Malguzzi P. SPERANZA, Antonio mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1981
Rivista:	GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS
Abstract:	The transition of the middle-latitude atmospheric circulation from “zonal” to “meridional” type is known to occur in connection with the growth of local disturbances characterized by a very low mobility. This process is very frequent over Europe, where it leads usually to a blocking situation. In this paper, the physical conditions that determine the growth and the motion of localized disturbances (wave packets) in a rotating (β-plane) westerly flow are analysed for various mechanisms of instability. The results are discussed in the light of what is known from available data.
Handle:	http://hdl.handle.net/11581/242727
Appare nelle tipologie:	Articolo

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