Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases

The aim of this study is to analyse the interannual variability of monthly climatic indices of extreme daily temperature in the central-north region of Argentina throughout a year and its relationship with the atmospheric circulation. The impact of El Niño-Southern Oscillation (ENSO) over different...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Rusticucci, Matilde, Barrucand, Mariana Graciela
Publicado:	2017
Materias:	Argentina interannual variability ENSO monthly extreme temperature events South Atlantic anticyclone subtropical jet stream trends Atmospheric pressure Climatology Fighter aircraft Nickel Surveys Tropics Extreme temperature events Interannual variability South Atlantic Subtropical jet Trends Atmospheric temperature air temperature annual variation anticyclone El Nino-Southern Oscillation extreme event jet stream trend analysis Atlantic Ocean Atlantic Ocean (South)
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v37_n6_p3003_Rusticucci http://hdl.handle.net/20.500.12110/paper_08998418_v37_n6_p3003_Rusticucci
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08998418_v37_n6_p3003_Rusticucci
record_format	dspace
spelling	paper:paper_08998418_v37_n6_p3003_Rusticucci2023-06-08T15:49:48Z Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases Rusticucci, Matilde Barrucand, Mariana Graciela Argentina interannual variability ENSO monthly extreme temperature events South Atlantic anticyclone subtropical jet stream trends Atmospheric pressure Climatology Fighter aircraft Nickel Surveys Tropics Argentina Extreme temperature events Interannual variability South Atlantic Subtropical jet Trends Atmospheric temperature air temperature annual variation anticyclone El Nino-Southern Oscillation extreme event jet stream trend analysis Argentina Atlantic Ocean Atlantic Ocean (South) The aim of this study is to analyse the interannual variability of monthly climatic indices of extreme daily temperature in the central-north region of Argentina throughout a year and its relationship with the atmospheric circulation. The impact of El Niño-Southern Oscillation (ENSO) over different temperature indices throughout the year is specially analysed. Globally used indices in the 1970–2010 period are utilized for this purpose. The trends of temperature extremes show warming conditions in several months, especially in October and November. In order to find possible forcings of extreme temperature in the region at monthly scale, the co-variability with other circulation monthly time series such as changes in the intensity of Southern Hemisphere semi-permanent anticyclones and the intensity of the subtropical jet were studied. The main finding was a systematic shift of the South Atlantic anticyclone towards the west over the decades in June and August, which might hinder the cold advections over the region surveyed. Moreover, the influence of the variation on the intensity of the subtropical jet over extreme events showed significant positive (negative) correlations between the intensity of the jet and the frequency of cold (warm) indices in a great number of months. Finally, the influence of the ENSO phases on each of the temperature extremes analysed was studied. It was found that under El Niño conditions, minimum temperatures are affected quite evenly throughout the year, fostering the occurrence of warm nights. The impact of the El Niño event on the maximum extreme temperatures, however, shows seasonal differences. Between July and September warm days conditions are fostered, while between November and February the opposite (cold days) can be seen. This results in a decrease in the temperature range in the region surveyed during the summer months under El Niño conditions. © 2016 Royal Meteorological Society Fil:Rusticucci, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barrucand, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v37_n6_p3003_Rusticucci http://hdl.handle.net/20.500.12110/paper_08998418_v37_n6_p3003_Rusticucci
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina interannual variability ENSO monthly extreme temperature events South Atlantic anticyclone subtropical jet stream trends Atmospheric pressure Climatology Fighter aircraft Nickel Surveys Tropics Argentina Extreme temperature events Interannual variability South Atlantic Subtropical jet Trends Atmospheric temperature air temperature annual variation anticyclone El Nino-Southern Oscillation extreme event jet stream trend analysis Argentina Atlantic Ocean Atlantic Ocean (South)
spellingShingle	Argentina interannual variability ENSO monthly extreme temperature events South Atlantic anticyclone subtropical jet stream trends Atmospheric pressure Climatology Fighter aircraft Nickel Surveys Tropics Argentina Extreme temperature events Interannual variability South Atlantic Subtropical jet Trends Atmospheric temperature air temperature annual variation anticyclone El Nino-Southern Oscillation extreme event jet stream trend analysis Argentina Atlantic Ocean Atlantic Ocean (South) Rusticucci, Matilde Barrucand, Mariana Graciela Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
topic_facet	Argentina interannual variability ENSO monthly extreme temperature events South Atlantic anticyclone subtropical jet stream trends Atmospheric pressure Climatology Fighter aircraft Nickel Surveys Tropics Argentina Extreme temperature events Interannual variability South Atlantic Subtropical jet Trends Atmospheric temperature air temperature annual variation anticyclone El Nino-Southern Oscillation extreme event jet stream trend analysis Argentina Atlantic Ocean Atlantic Ocean (South)
description	The aim of this study is to analyse the interannual variability of monthly climatic indices of extreme daily temperature in the central-north region of Argentina throughout a year and its relationship with the atmospheric circulation. The impact of El Niño-Southern Oscillation (ENSO) over different temperature indices throughout the year is specially analysed. Globally used indices in the 1970–2010 period are utilized for this purpose. The trends of temperature extremes show warming conditions in several months, especially in October and November. In order to find possible forcings of extreme temperature in the region at monthly scale, the co-variability with other circulation monthly time series such as changes in the intensity of Southern Hemisphere semi-permanent anticyclones and the intensity of the subtropical jet were studied. The main finding was a systematic shift of the South Atlantic anticyclone towards the west over the decades in June and August, which might hinder the cold advections over the region surveyed. Moreover, the influence of the variation on the intensity of the subtropical jet over extreme events showed significant positive (negative) correlations between the intensity of the jet and the frequency of cold (warm) indices in a great number of months. Finally, the influence of the ENSO phases on each of the temperature extremes analysed was studied. It was found that under El Niño conditions, minimum temperatures are affected quite evenly throughout the year, fostering the occurrence of warm nights. The impact of the El Niño event on the maximum extreme temperatures, however, shows seasonal differences. Between July and September warm days conditions are fostered, while between November and February the opposite (cold days) can be seen. This results in a decrease in the temperature range in the region surveyed during the summer months under El Niño conditions. © 2016 Royal Meteorological Society
author	Rusticucci, Matilde Barrucand, Mariana Graciela
author_facet	Rusticucci, Matilde Barrucand, Mariana Graciela
author_sort	Rusticucci, Matilde
title	Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
title_short	Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
title_full	Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
title_fullStr	Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
title_full_unstemmed	Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases
title_sort	temperature extremes in the argentina central region and their monthly relationship with the mean circulation and enso phases
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v37_n6_p3003_Rusticucci http://hdl.handle.net/20.500.12110/paper_08998418_v37_n6_p3003_Rusticucci
work_keys_str_mv	AT rusticuccimatilde temperatureextremesintheargentinacentralregionandtheirmonthlyrelationshipwiththemeancirculationandensophases AT barrucandmarianagraciela temperatureextremesintheargentinacentralregionandtheirmonthlyrelationshipwiththemeancirculationandensophases
_version_	1768542699221155840

Temperature extremes in the Argentina central region and their monthly relationship with the mean circulation and ENSO phases

Ejemplares similares