A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data

This paper compares surface-station temperature observations over Argentina with gridpoint analyses available in the NCEP-NCAR reanalysis dataset. The primary objective is to determine whether the maximum and minimum surface temperatures from the reanalysis can be used to compute statistics on the o...

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Detalles Bibliográficos
Autores principales: Rusticucci, M.M., Kousky, V.E.
Formato: JOUR
Materias:
Temperature distribution
Topography
Climatology
comparative study
extreme event
regional climate
surface temperature
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08948755_v15_n15_p2089_Rusticucci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08948755_v15_n15_p2089_Rusticucci2023-10-03T15:42:07Z A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data Rusticucci, M.M. Kousky, V.E. Temperature distribution Topography Climatology comparative study extreme event regional climate surface temperature Argentina This paper compares surface-station temperature observations over Argentina with gridpoint analyses available in the NCEP-NCAR reanalysis dataset. The primary objective is to determine whether the maximum and minimum surface temperatures from the reanalysis can be used to compute statistics on the occurence of extreme events. The extreme range of topography and geography of Argentina is viewed as a severe test for the reanalysis data. Good agreement, on both the daily and monthly timescales, between the station data and the reanalysis gridpoint data is found over the low-elevation regions in central and eastern Argentina. The agreement is relatively poor for summertime maximum temperatures over northern Argentina. The reanalysis data underestimate the intensity of extreme warm events over northern and southern Argentina and overestimate extreme cold events during winter over central Argentina. High-elevation areas in western Argentina have the poorest correspondence throughout the year. Thus, the NCEP-NCAR reanalysis data have to be used with caution for studies of the magnitude of day-to-day temperature changes. The results of this study indicate that the NCEP-NCAR reanalysis data are sufficient for determining the timing of midlatitude events but are not sufficient for determining the amplitude and frequency in the subtropics and in regions of high relief. The use of anomalies tends to improve the amount of agreement between the reanalysis data and station observations. Fil:Rusticucci, M.M. 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_08948755_v15_n15_p2089_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 Temperature distribution
Topography
Climatology
comparative study
extreme event
regional climate
surface temperature
Argentina
spellingShingle Temperature distribution
Topography
Climatology
comparative study
extreme event
regional climate
surface temperature
Argentina
Rusticucci, M.M.
Kousky, V.E.
A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
topic_facet Temperature distribution
Topography
Climatology
comparative study
extreme event
regional climate
surface temperature
Argentina
description This paper compares surface-station temperature observations over Argentina with gridpoint analyses available in the NCEP-NCAR reanalysis dataset. The primary objective is to determine whether the maximum and minimum surface temperatures from the reanalysis can be used to compute statistics on the occurence of extreme events. The extreme range of topography and geography of Argentina is viewed as a severe test for the reanalysis data. Good agreement, on both the daily and monthly timescales, between the station data and the reanalysis gridpoint data is found over the low-elevation regions in central and eastern Argentina. The agreement is relatively poor for summertime maximum temperatures over northern Argentina. The reanalysis data underestimate the intensity of extreme warm events over northern and southern Argentina and overestimate extreme cold events during winter over central Argentina. High-elevation areas in western Argentina have the poorest correspondence throughout the year. Thus, the NCEP-NCAR reanalysis data have to be used with caution for studies of the magnitude of day-to-day temperature changes. The results of this study indicate that the NCEP-NCAR reanalysis data are sufficient for determining the timing of midlatitude events but are not sufficient for determining the amplitude and frequency in the subtropics and in regions of high relief. The use of anomalies tends to improve the amount of agreement between the reanalysis data and station observations.
format JOUR
author Rusticucci, M.M.
Kousky, V.E.
author_facet Rusticucci, M.M.
Kousky, V.E.
author_sort Rusticucci, M.M.
title A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
title_short A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
title_full A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
title_fullStr A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
title_full_unstemmed A comparative study of maximum and minimum temperatures over Argentina: NCEP-NCAR reanalysis versus station data
title_sort comparative study of maximum and minimum temperatures over argentina: ncep-ncar reanalysis versus station data
url http://hdl.handle.net/20.500.12110/paper_08948755_v15_n15_p2089_Rusticucci
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