Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina

An objective classification of sequence patterns of 1000 hPa and 500 hPa geopotential heights associated with cold surges over Central Argentina was carried out. Polar Outbreaks during wintertime in Central Argentina (May to September) cause important damage to the regional agriculture and sometimes...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Escobar, G., Compagnucci, R., Bischoff, S.
Formato: JOUR
Materias:
Blockings
Cold surges
Principal components
atmospheric blocking
cold front
geopotential
Argentina
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01876236_v17_n2_p69_Escobar
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01876236_v17_n2_p69_Escobar
record_format dspace
spelling todo:paper_01876236_v17_n2_p69_Escobar2023-10-03T15:08:45Z Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina Escobar, G. Compagnucci, R. Bischoff, S. Blockings Cold surges Principal components atmospheric blocking cold front geopotential Argentina South America An objective classification of sequence patterns of 1000 hPa and 500 hPa geopotential heights associated with cold surges over Central Argentina was carried out. Polar Outbreaks during wintertime in Central Argentina (May to September) cause important damage to the regional agriculture and sometimes affect the energy supply. In particular, the consumption of natural gas is strongly dependent on significant temperature descents. The rotated Principal Components Analysis (PCA) was used to obtain the basic patterns of sequence of 1000 hPa and 500 hPa geopotential heights. The winter cold surges during the 1979-1993 period occur in seven patterns at 1000 hPa and three modes at 500 hPa. The combination of both levels shows three typical situations related to cold surges over Central Argentina. The most classic pattern shows an important ridge west of the Pacific coast of the continent at its upper level and a postfrontal anticyclone at its lower level producing cold air advection over Central Argentina. The other two patterns present a long wave trough at upper levels affecting the continent, one of them with the postfrontal anticyclone moving over middle and low latitudes, and the other with the migratory anticyclone affecting lower latitudes. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01876236_v17_n2_p69_Escobar
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Blockings
Cold surges
Principal components
atmospheric blocking
cold front
geopotential
Argentina
South America
spellingShingle Blockings
Cold surges
Principal components
atmospheric blocking
cold front
geopotential
Argentina
South America
Escobar, G.
Compagnucci, R.
Bischoff, S.
Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
topic_facet Blockings
Cold surges
Principal components
atmospheric blocking
cold front
geopotential
Argentina
South America
description An objective classification of sequence patterns of 1000 hPa and 500 hPa geopotential heights associated with cold surges over Central Argentina was carried out. Polar Outbreaks during wintertime in Central Argentina (May to September) cause important damage to the regional agriculture and sometimes affect the energy supply. In particular, the consumption of natural gas is strongly dependent on significant temperature descents. The rotated Principal Components Analysis (PCA) was used to obtain the basic patterns of sequence of 1000 hPa and 500 hPa geopotential heights. The winter cold surges during the 1979-1993 period occur in seven patterns at 1000 hPa and three modes at 500 hPa. The combination of both levels shows three typical situations related to cold surges over Central Argentina. The most classic pattern shows an important ridge west of the Pacific coast of the continent at its upper level and a postfrontal anticyclone at its lower level producing cold air advection over Central Argentina. The other two patterns present a long wave trough at upper levels affecting the continent, one of them with the postfrontal anticyclone moving over middle and low latitudes, and the other with the migratory anticyclone affecting lower latitudes.
format JOUR
author Escobar, G.
Compagnucci, R.
Bischoff, S.
author_facet Escobar, G.
Compagnucci, R.
Bischoff, S.
author_sort Escobar, G.
title Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
title_short Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
title_full Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
title_fullStr Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
title_full_unstemmed Sequence patterns of 1000 hPa and 500 hPa geopotential height fields associated with cold surges over Central Argentina
title_sort sequence patterns of 1000 hpa and 500 hpa geopotential height fields associated with cold surges over central argentina
url http://hdl.handle.net/20.500.12110/paper_01876236_v17_n2_p69_Escobar
work_keys_str_mv AT escobarg sequencepatternsof1000hpaand500hpageopotentialheightfieldsassociatedwithcoldsurgesovercentralargentina
AT compagnuccir sequencepatternsof1000hpaand500hpageopotentialheightfieldsassociatedwithcoldsurgesovercentralargentina
AT bischoffs sequencepatternsof1000hpaand500hpageopotentialheightfieldsassociatedwithcoldsurgesovercentralargentina
_version_ 1807322699623563264

Ejemplares similares