Relationship between ENSO cycles and frost events within the Pampa Humeda region

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The objective of the present paper is to analyse the possible impact of ENSO events on the spatial and the temporal distribution of frost occurrences, within the central region of Argentina. Therefore, the minimum temperature series have been studied for 41 meteorological stations within the Pampa H...

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Autores principales: Müller, G.V., Nuñez, M.N., Seluchi, M.E.
Formato: JOUR
Materias:
El Nino
El Nino-Southern Oscillation
Frost frequency
La Nina
Pampa Humeda region
Southern Oscillation Index
frost
spatiotemporal analysis
teleconnection
Argentina
Pampa Humeda
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08998418_v20_n13_p1619_Muller
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08998418_v20_n13_p1619_Muller
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spelling todo:paper_08998418_v20_n13_p1619_Muller2023-10-03T15:44:11Z Relationship between ENSO cycles and frost events within the Pampa Humeda region Müller, G.V. Nuñez, M.N. Seluchi, M.E. El Nino El Nino-Southern Oscillation Frost frequency La Nina Pampa Humeda region Southern Oscillation Index El Nino El Nino-Southern Oscillation frost La Nina spatiotemporal analysis teleconnection Argentina Pampa Humeda The objective of the present paper is to analyse the possible impact of ENSO events on the spatial and the temporal distribution of frost occurrences, within the central region of Argentina. Therefore, the minimum temperature series have been studied for 41 meteorological stations within the Pampa Humeda region and, for a period of 30 years from 1961 to 1990, exploring possible relationships with El Nino (EN)/La Nina (LN) events and the changes in the Southern Oscillation. It can be concluded that part of the frost frequency variability within this region is explained by the ENSO cycle. Results indicate that, for at least 1 of the 2 years in which the EN event takes place, the mean number of frost occurrences drops below the climatological value. The low phase of the Southern Oscillation Index (SOI) also coincides with those years for which the number of frost events remained below the total annual mean in all cases, with the year 1965 as an exception. Conversely, during the high phase of the SOI, this number was above the total annual mean for four of the six classified cases. In the particular case of seasonal frost occurrence, it is related to the warm event development state, exhibiting a greater impact during the autumn and winter months, for which the cold event also seems to have influence. Copyright (C) 2000 Royal Meteorological Society. Fil:Müller, G.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Nuñez, M.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Seluchi, M.E. 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_08998418_v20_n13_p1619_Muller
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic El Nino
El Nino-Southern Oscillation
Frost frequency
La Nina
Pampa Humeda region
Southern Oscillation Index
El Nino
El Nino-Southern Oscillation
frost
La Nina
spatiotemporal analysis
teleconnection
Argentina
Pampa Humeda
spellingShingle El Nino
El Nino-Southern Oscillation
Frost frequency
La Nina
Pampa Humeda region
Southern Oscillation Index
El Nino
El Nino-Southern Oscillation
frost
La Nina
spatiotemporal analysis
teleconnection
Argentina
Pampa Humeda
Müller, G.V.
Nuñez, M.N.
Seluchi, M.E.
Relationship between ENSO cycles and frost events within the Pampa Humeda region
topic_facet El Nino
El Nino-Southern Oscillation
Frost frequency
La Nina
Pampa Humeda region
Southern Oscillation Index
El Nino
El Nino-Southern Oscillation
frost
La Nina
spatiotemporal analysis
teleconnection
Argentina
Pampa Humeda
description The objective of the present paper is to analyse the possible impact of ENSO events on the spatial and the temporal distribution of frost occurrences, within the central region of Argentina. Therefore, the minimum temperature series have been studied for 41 meteorological stations within the Pampa Humeda region and, for a period of 30 years from 1961 to 1990, exploring possible relationships with El Nino (EN)/La Nina (LN) events and the changes in the Southern Oscillation. It can be concluded that part of the frost frequency variability within this region is explained by the ENSO cycle. Results indicate that, for at least 1 of the 2 years in which the EN event takes place, the mean number of frost occurrences drops below the climatological value. The low phase of the Southern Oscillation Index (SOI) also coincides with those years for which the number of frost events remained below the total annual mean in all cases, with the year 1965 as an exception. Conversely, during the high phase of the SOI, this number was above the total annual mean for four of the six classified cases. In the particular case of seasonal frost occurrence, it is related to the warm event development state, exhibiting a greater impact during the autumn and winter months, for which the cold event also seems to have influence. Copyright (C) 2000 Royal Meteorological Society.
format JOUR
author Müller, G.V.
Nuñez, M.N.
Seluchi, M.E.
author_facet Müller, G.V.
Nuñez, M.N.
Seluchi, M.E.
author_sort Müller, G.V.
title Relationship between ENSO cycles and frost events within the Pampa Humeda region
title_short Relationship between ENSO cycles and frost events within the Pampa Humeda region
title_full Relationship between ENSO cycles and frost events within the Pampa Humeda region
title_fullStr Relationship between ENSO cycles and frost events within the Pampa Humeda region
title_full_unstemmed Relationship between ENSO cycles and frost events within the Pampa Humeda region
title_sort relationship between enso cycles and frost events within the pampa humeda region
url http://hdl.handle.net/20.500.12110/paper_08998418_v20_n13_p1619_Muller
work_keys_str_mv AT mullergv relationshipbetweenensocyclesandfrosteventswithinthepampahumedaregion
AT nunezmn relationshipbetweenensocyclesandfrosteventswithinthepampahumedaregion
AT seluchime relationshipbetweenensocyclesandfrosteventswithinthepampahumedaregion
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