Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data

Zonal velocity and temperature daily global reanalysis data of 30 years are used to search seasonally steady planetary disturbances in the middle troposphere (400 hPa) and middle stratosphere (10 hPa). Significant wavenumber 1, 2 and 3 modes are found. Constant phase lines of zonal velocity 1 modes...

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Autores principales: Alexander, P., Rossi, M.
Formato: JOUR
Materias:
Planetary scale disturbances
Reanalysis
Inclination angles
Large scale structures
Northern hemisphere
Planetary scale
Quasi-stationary
Southern Hemisphere
Velocity constants
Optical constants
Troposphere
Upper atmosphere
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02731177_v52_n3_p437_Alexander
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02731177_v52_n3_p437_Alexander
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spelling todo:paper_02731177_v52_n3_p437_Alexander2023-10-03T15:15:44Z Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data Alexander, P. Rossi, M. Planetary scale disturbances Reanalysis Inclination angles Large scale structures Northern hemisphere Planetary scale Quasi-stationary Reanalysis Southern Hemisphere Velocity constants Optical constants Troposphere Upper atmosphere Zonal velocity and temperature daily global reanalysis data of 30 years are used to search seasonally steady planetary disturbances in the middle troposphere (400 hPa) and middle stratosphere (10 hPa). Significant wavenumber 1, 2 and 3 modes are found. Constant phase lines of zonal velocity 1 modes exhibit significant inclination angles with respect to the meridians. The winter hemisphere generally shows a more significant presence of structures. The Northern Hemisphere (NH) exhibits all over the year a larger amount of structures and more intense amplitudes than the Southern Hemisphere (SH). Middle latitudes exhibit the most significant cases and low latitudes the least significant ones. Longitudinally oriented land-sea transitions at ±65 and -35 latitudes appear to play a significant role for the presence of steady planetary modes. The stratosphere exhibits a much simpler picture than the troposphere. Large scale structures with respectively NE-SW (NH) and NW-SE (SH) tilts in the observed temperature and zonal velocity constant phase lines recall the quasi-stationary Rossby wave trains that favor the poleward transport of angular momentum. © 2013 COSPAR. Published by Elsevier Ltd. All rights reserved. Fil:Alexander, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02731177_v52_n3_p437_Alexander
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Planetary scale disturbances
Reanalysis
Inclination angles
Large scale structures
Northern hemisphere
Planetary scale
Quasi-stationary
Reanalysis
Southern Hemisphere
Velocity constants
Optical constants
Troposphere
Upper atmosphere
spellingShingle Planetary scale disturbances
Reanalysis
Inclination angles
Large scale structures
Northern hemisphere
Planetary scale
Quasi-stationary
Reanalysis
Southern Hemisphere
Velocity constants
Optical constants
Troposphere
Upper atmosphere
Alexander, P.
Rossi, M.
Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
topic_facet Planetary scale disturbances
Reanalysis
Inclination angles
Large scale structures
Northern hemisphere
Planetary scale
Quasi-stationary
Reanalysis
Southern Hemisphere
Velocity constants
Optical constants
Troposphere
Upper atmosphere
description Zonal velocity and temperature daily global reanalysis data of 30 years are used to search seasonally steady planetary disturbances in the middle troposphere (400 hPa) and middle stratosphere (10 hPa). Significant wavenumber 1, 2 and 3 modes are found. Constant phase lines of zonal velocity 1 modes exhibit significant inclination angles with respect to the meridians. The winter hemisphere generally shows a more significant presence of structures. The Northern Hemisphere (NH) exhibits all over the year a larger amount of structures and more intense amplitudes than the Southern Hemisphere (SH). Middle latitudes exhibit the most significant cases and low latitudes the least significant ones. Longitudinally oriented land-sea transitions at ±65 and -35 latitudes appear to play a significant role for the presence of steady planetary modes. The stratosphere exhibits a much simpler picture than the troposphere. Large scale structures with respectively NE-SW (NH) and NW-SE (SH) tilts in the observed temperature and zonal velocity constant phase lines recall the quasi-stationary Rossby wave trains that favor the poleward transport of angular momentum. © 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
format JOUR
author Alexander, P.
Rossi, M.
author_facet Alexander, P.
Rossi, M.
author_sort Alexander, P.
title Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
title_short Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
title_full Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
title_fullStr Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
title_full_unstemmed Seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of NCEP reanalysis data
title_sort seasonally steady planetary disturbances in the troposphere and stratosphere as seen in 30 years of ncep reanalysis data
url http://hdl.handle.net/20.500.12110/paper_02731177_v52_n3_p437_Alexander
work_keys_str_mv AT alexanderp seasonallysteadyplanetarydisturbancesinthetroposphereandstratosphereasseenin30yearsofncepreanalysisdata
AT rossim seasonallysteadyplanetarydisturbancesinthetroposphereandstratosphereasseenin30yearsofncepreanalysisdata
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