Classification of hemispheric monthly mean stratospheric potential vorticity fields

Monthly mean NCEP reanalysis potential vorticity fields at the 650 K isentropic level over the Northern and Southern Hemispheres between 1979 and 1997 were studied using multivariate analysis tools. Principal component analysis in the T-mode was applied to demonstrate the validity of such statistica...

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Detalles Bibliográficos
Autores principales:	Huth, R., Canziani, P.O.
Formato:	JOUR
Materias:	Meteorology and atmospheric dynamics (middle atmosphere dynamics; general circulation; climatology) multivariate analysis potential vorticity stratosphere
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09927689_v21_n3_p805_Huth
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09927689_v21_n3_p805_Huth
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spelling	todo:paper_09927689_v21_n3_p805_Huth2023-10-03T15:55:41Z Classification of hemispheric monthly mean stratospheric potential vorticity fields Huth, R. Canziani, P.O. Meteorology and atmospheric dynamics (middle atmosphere dynamics; general circulation; climatology) multivariate analysis potential vorticity stratosphere Monthly mean NCEP reanalysis potential vorticity fields at the 650 K isentropic level over the Northern and Southern Hemispheres between 1979 and 1997 were studied using multivariate analysis tools. Principal component analysis in the T-mode was applied to demonstrate the validity of such statistical techniques for the study of stratospheric dynamics and climatology. The method, complementarily applied to both the raw and anomaly fields, was useful in determining and classifying the characteristics of winter and summer PV fields on both hemispheres, in particular, the well-known differences in the behaviour and persistence of the polar vortices. It was possible to identify such features as sudden warming events in the Northern Hemisphere and final warning dates in both hemispheres. The stratospheric impact of other atmospheric processes, such as volcanic eruptions, also identified though the results, must be viewed at this stage as tentative. An interesting change in behaviour around 1990 was detected over both hemispheres. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09927689_v21_n3_p805_Huth
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Meteorology and atmospheric dynamics (middle atmosphere dynamics; general circulation; climatology) multivariate analysis potential vorticity stratosphere
spellingShingle	Meteorology and atmospheric dynamics (middle atmosphere dynamics; general circulation; climatology) multivariate analysis potential vorticity stratosphere Huth, R. Canziani, P.O. Classification of hemispheric monthly mean stratospheric potential vorticity fields
topic_facet	Meteorology and atmospheric dynamics (middle atmosphere dynamics; general circulation; climatology) multivariate analysis potential vorticity stratosphere
description	Monthly mean NCEP reanalysis potential vorticity fields at the 650 K isentropic level over the Northern and Southern Hemispheres between 1979 and 1997 were studied using multivariate analysis tools. Principal component analysis in the T-mode was applied to demonstrate the validity of such statistical techniques for the study of stratospheric dynamics and climatology. The method, complementarily applied to both the raw and anomaly fields, was useful in determining and classifying the characteristics of winter and summer PV fields on both hemispheres, in particular, the well-known differences in the behaviour and persistence of the polar vortices. It was possible to identify such features as sudden warming events in the Northern Hemisphere and final warning dates in both hemispheres. The stratospheric impact of other atmospheric processes, such as volcanic eruptions, also identified though the results, must be viewed at this stage as tentative. An interesting change in behaviour around 1990 was detected over both hemispheres.
format	JOUR
author	Huth, R. Canziani, P.O.
author_facet	Huth, R. Canziani, P.O.
author_sort	Huth, R.
title	Classification of hemispheric monthly mean stratospheric potential vorticity fields
title_short	Classification of hemispheric monthly mean stratospheric potential vorticity fields
title_full	Classification of hemispheric monthly mean stratospheric potential vorticity fields
title_fullStr	Classification of hemispheric monthly mean stratospheric potential vorticity fields
title_full_unstemmed	Classification of hemispheric monthly mean stratospheric potential vorticity fields
title_sort	classification of hemispheric monthly mean stratospheric potential vorticity fields
url	http://hdl.handle.net/20.500.12110/paper_09927689_v21_n3_p805_Huth
work_keys_str_mv	AT huthr classificationofhemisphericmonthlymeanstratosphericpotentialvorticityfields AT canzianipo classificationofhemisphericmonthlymeanstratosphericpotentialvorticityfields
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Classification of hemispheric monthly mean stratospheric potential vorticity fields

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