Extreme cold events: the case of Bahía Blanca (Argentina)

The objective of this investigation is to characterize the frequency, duration and intensity of extreme cold episodes (Period of Very Low Extreme Temperatures -PVLET-, Cold Waves –CW- and Frost Days –FD0-) that occurred in Bahía Blanca and the synoptic situation associated to its development. We obs...

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Detalles Bibliográficos
Autores principales: Fernández, María Eugenia, Gentili, Jorge Osvaldo
Formato: Artículo revista
Lenguaje:Español
Publicado: Departamento de Geografía. Facultad de Humanidades. Universidad Nacional del Comahue 2022
Materias:
Período de Temperaturas Extremas Muy Bajas
Olas de frío
Días de heladas
Cambio Climático
Calentamiento Global
Period of very low temperatures
Cold events
Frost days
Climatic Change
Global warming
Acceso en línea:https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097
Aporte de:
Repositorio de Revistas Electrónicas REVELE (UNComahue) de Universidad Nacional del Comahue
id I22-R128-article-4097
record_format ojs
spelling I22-R128-article-40972023-07-25T15:14:14Z Extreme cold events: the case of Bahía Blanca (Argentina) Eventos fríos extremos: el caso de Bahía Blanca (Argentina) Fernández, María Eugenia Gentili, Jorge Osvaldo Período de Temperaturas Extremas Muy Bajas Olas de frío Días de heladas Cambio Climático Calentamiento Global Period of very low temperatures Cold events Frost days Climatic Change Global warming The objective of this investigation is to characterize the frequency, duration and intensity of extreme cold episodes (Period of Very Low Extreme Temperatures -PVLET-, Cold Waves –CW- and Frost Days –FD0-) that occurred in Bahía Blanca and the synoptic situation associated to its development. We observed that most of the PVLET and OC had a three-day duration and occurred in June and July. About its decadic frequency, the 10-year periods 1981-1990 and 1991-2000 had the highest records of the whole period. In 2011-2020 we found the minimum frequency of PVLET and no HW were recorded. About the relationship between intensity and absolute frequency of CW, we verified that when CW where more frequent, its mean decadic intensity was higher. On the synoptic situations, CW were associated with the presence of a high pressure system in the center of the country, which defines the dominance of cold, dry air and clear skies. Winter frosts were the most intense and frequent in all decades and late frosts were more frequent and intense than the first ones. In the highest intensity range analyzed there was only a record of occurrence for winters and only in the first three decades. During 2011-2020 we observed a decrease in the intensity of first frosts, and late frosts showed an increase in frequency of occurrence and intensity. El objetivo de la presente investigación es caracterizar la frecuencia, duración e intensidad de los episodios de frío extremo (Período de Temperaturas Extremas Muy Bajas -PTEMB-, Olas de Frío -OF- y Días con Heladas –FD0-) ocurridos en Bahía Blanca y la situación sinóptica asociada a su desarrollo. Pudo observarse que la mayor parte de los PTEMB y OF hallados tuvieron una duración de tres días y ocurrieron entre junio y julio. Sobre su frecuencia decádica, los decenios 1981-1990 y 1991-2000 tuvieron los mayores valores de todo el registro. En 2011-2020 se halló la mínima frecuencia de ocurrencia de PTEMB y no se registraron OF. Respecto a la relación entre la intensidad y la frecuencia absoluta de OF, se verificó que en la medida que las OF fueron más frecuentes, su intensidad media decádica aumentó. Sobre las situaciones sinópticas, las OF se asociaron a la presencia de un centro anticiclónico en el centro del país, que define la dominancia de aire frío, seco y cielos despejados. Las heladas invernales fueron las más intensas y frecuentes en todas las décadas analizadas y las heladas tardías más frecuentes e intensas que las tempranas. En el rango de mayor intensidad analizado solo hubo registro de ocurrencia para las invernales y solo en los primeros tres decenios. Durante 2011-2020 se observó una disminución en la intensidad de las heladas tempranas, y las heladas tardías presentaron un aumento en la frecuencia de ocurrencia e intensidad. Departamento de Geografía. Facultad de Humanidades. Universidad Nacional del Comahue 2022-12-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html application/zip https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097 ark:/s2313903x/b0mmov9rp Boletín Geográfico; Vol. 44 No. 2 (2022): Boletín Geográfico 44(2); 13-37 Boletin Geografico; Vol. 44 Núm. 2 (2022): Boletín Geográfico 44(2); 13-37 2313-903X 0326-1735 spa https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097/61869 https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097/61488 https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097/61489 National Nacional Derechos de autor 2022 Boletín Geográfico https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
institution Universidad Nacional del Comahue
institution_str I-22
repository_str R-128
container_title_str Repositorio de Revistas Electrónicas REVELE (UNComahue)
language Español
format Artículo revista
topic Período de Temperaturas Extremas Muy Bajas
Olas de frío
Días de heladas
Cambio Climático
Calentamiento Global
Period of very low temperatures
Cold events
Frost days
Climatic Change
Global warming
spellingShingle Período de Temperaturas Extremas Muy Bajas
Olas de frío
Días de heladas
Cambio Climático
Calentamiento Global
Period of very low temperatures
Cold events
Frost days
Climatic Change
Global warming
Fernández, María Eugenia
Gentili, Jorge Osvaldo
Extreme cold events: the case of Bahía Blanca (Argentina)
topic_facet Período de Temperaturas Extremas Muy Bajas
Olas de frío
Días de heladas
Cambio Climático
Calentamiento Global
Period of very low temperatures
Cold events
Frost days
Climatic Change
Global warming
author Fernández, María Eugenia
Gentili, Jorge Osvaldo
author_facet Fernández, María Eugenia
Gentili, Jorge Osvaldo
author_sort Fernández, María Eugenia
title Extreme cold events: the case of Bahía Blanca (Argentina)
title_short Extreme cold events: the case of Bahía Blanca (Argentina)
title_full Extreme cold events: the case of Bahía Blanca (Argentina)
title_fullStr Extreme cold events: the case of Bahía Blanca (Argentina)
title_full_unstemmed Extreme cold events: the case of Bahía Blanca (Argentina)
title_sort extreme cold events: the case of bahía blanca (argentina)
description The objective of this investigation is to characterize the frequency, duration and intensity of extreme cold episodes (Period of Very Low Extreme Temperatures -PVLET-, Cold Waves –CW- and Frost Days –FD0-) that occurred in Bahía Blanca and the synoptic situation associated to its development. We observed that most of the PVLET and OC had a three-day duration and occurred in June and July. About its decadic frequency, the 10-year periods 1981-1990 and 1991-2000 had the highest records of the whole period. In 2011-2020 we found the minimum frequency of PVLET and no HW were recorded. About the relationship between intensity and absolute frequency of CW, we verified that when CW where more frequent, its mean decadic intensity was higher. On the synoptic situations, CW were associated with the presence of a high pressure system in the center of the country, which defines the dominance of cold, dry air and clear skies. Winter frosts were the most intense and frequent in all decades and late frosts were more frequent and intense than the first ones. In the highest intensity range analyzed there was only a record of occurrence for winters and only in the first three decades. During 2011-2020 we observed a decrease in the intensity of first frosts, and late frosts showed an increase in frequency of occurrence and intensity.
publisher Departamento de Geografía. Facultad de Humanidades. Universidad Nacional del Comahue
publishDate 2022
url https://revele.uncoma.edu.ar/index.php/geografia/article/view/4097
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AT gentilijorgeosvaldo extremecoldeventsthecaseofbahiablancaargentina
AT fernandezmariaeugenia eventosfriosextremoselcasodebahiablancaargentina
AT gentilijorgeosvaldo eventosfriosextremoselcasodebahiablancaargentina
first_indexed 2023-01-04T21:53:56Z
last_indexed 2024-08-12T23:05:10Z
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