The Sensitivity of Characteristics of Large Scale Baroclinic Unstable Waves in Southern Hemisphere to the Underlying Climate
Item
Title (Dublin Core)
The Sensitivity of Characteristics of Large Scale Baroclinic Unstable Waves in Southern Hemisphere to the Underlying Climate
Description (Dublin Core)
The sensitivity of the main characteristics of baroclinically unstable waves with respect to fundamental parameters of the atmosphere (the static stability parameter σ0 and vertical shear of a zonal wind Λ) is theoretically explored. Two types of waves are considered: synoptic scale waves and planetary scale (ultralong) waves based on an Eady-type model and model with vertically averaged primitive equations. Sensitivity functions are obtained that estimate the impact of variations
in σ0 and Λ on the growth rate and other characteristics of unstable waves and demonstrate that waves belonging to the short-wave part of the spectrum of unstable waves are more sensitive to changes in the static stability parameter than waves belonging to the long-wave part of the spectrum. The obtained theoretical results show that the increase of the static stability and decrease of the meridional temperature gradient in midlatitude baroclinic zones in some areas of the southern hemisphere lead to a slowing of the growth rate of baroclinic unstable waves and an increasing wavelength of baroclinic unstable wave maximum growth rate, that is, a spectrum shift of unstable waves towards longer wavelengths. These might affect the favorable conditions for the development of baroclinic instability and, therefore, the intensity of cyclone generation activity.
in σ0 and Λ on the growth rate and other characteristics of unstable waves and demonstrate that waves belonging to the short-wave part of the spectrum of unstable waves are more sensitive to changes in the static stability parameter than waves belonging to the long-wave part of the spectrum. The obtained theoretical results show that the increase of the static stability and decrease of the meridional temperature gradient in midlatitude baroclinic zones in some areas of the southern hemisphere lead to a slowing of the growth rate of baroclinic unstable waves and an increasing wavelength of baroclinic unstable wave maximum growth rate, that is, a spectrum shift of unstable waves towards longer wavelengths. These might affect the favorable conditions for the development of baroclinic instability and, therefore, the intensity of cyclone generation activity.
Creator (Dublin Core)
Sergei Soldatenko
Chris Tingwell
Subject (Dublin Core)
Meteorology. Climatology
QC851-999
Publisher (Dublin Core)
Hindawi Limited
Date (Dublin Core)
2013-01-01T00:00:00Z
Type (Dublin Core)
article
Identifier (Dublin Core)
1687-9309
1687-9317
10.1155/2013/981271
https://doaj.org/article/31e3e25c84ad45f8887738fbbb67b589
Source (Dublin Core)
Advances in Meteorology, Vol 2013 (2013)
Language (Dublin Core)
EN
Relation (Dublin Core)
http://dx.doi.org/10.1155/2013/981271
https://doaj.org/toc/1687-9309
https://doaj.org/toc/1687-9317
Provenance (Dublin Core)
Journal Licence: CC BY