A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model

An evaluation of the present-day climate in South America simulated by the MPI atmospheric limited area model, REMO, is made. The model dataset was generated by dynamical downscaling from the ECMWF-ERA40 reanalysis and compared to in-situ observations. The model is able to reproduce the low-level su...

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Autores principales: Silvestri, G., Vera, C., Jacob, D., Pfeifer, S., Teichmann, C.
Formato: JOUR
Materias:
Atmospheric hindcast
ERA40 downscaling
Regional model validation
REMO model
South American climate
atmospheric circulation
climatology
computer simulation
data set
hindcasting
modeling
monsoon
sea level pressure
weather forecasting
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09307575_v32_n5_p693_Silvestri
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_09307575_v32_n5_p693_Silvestri2023-10-03T15:47:53Z A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model Silvestri, G. Vera, C. Jacob, D. Pfeifer, S. Teichmann, C. Atmospheric hindcast ERA40 downscaling Regional model validation REMO model South American climate atmospheric circulation climatology computer simulation data set hindcasting modeling monsoon sea level pressure weather forecasting An evaluation of the present-day climate in South America simulated by the MPI atmospheric limited area model, REMO, is made. The model dataset was generated by dynamical downscaling from the ECMWF-ERA40 reanalysis and compared to in-situ observations. The model is able to reproduce the low-level summer monsoon circulation but it has some deficiencies in representing the South American Low-Level Jet structure. At upper levels, summer circulation features like the Bolivian High and the associated subtropical jet are well simulated by the model. Sea-level pressure fields are in general well represented by REMO. The model exhibits reasonable skill in representing the general features of the mean seasonal cycle of precipitation. Nevertheless, there is a systematic overestimation of precipitation in both tropical and subtropical regions. Differences between observed and modeled temperature are smaller than 1.5°C over most of the continent, excepting during spring when those differences are quite large. Results also show that the dynamical downscaling performed using REMO introduces some enhancement of the global reanalysis especially in temperature at the tropical regions during the warm season and in precipitation in both the subtropics and extratropics. It is then concluded that REMO can be a useful tool for regional downscaling of global simulations of present and future climates. © Springer-Verlag 2008. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09307575_v32_n5_p693_Silvestri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atmospheric hindcast
ERA40 downscaling
Regional model validation
REMO model
South American climate
atmospheric circulation
climatology
computer simulation
data set
hindcasting
modeling
monsoon
sea level pressure
weather forecasting
spellingShingle Atmospheric hindcast
ERA40 downscaling
Regional model validation
REMO model
South American climate
atmospheric circulation
climatology
computer simulation
data set
hindcasting
modeling
monsoon
sea level pressure
weather forecasting
Silvestri, G.
Vera, C.
Jacob, D.
Pfeifer, S.
Teichmann, C.
A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
topic_facet Atmospheric hindcast
ERA40 downscaling
Regional model validation
REMO model
South American climate
atmospheric circulation
climatology
computer simulation
data set
hindcasting
modeling
monsoon
sea level pressure
weather forecasting
description An evaluation of the present-day climate in South America simulated by the MPI atmospheric limited area model, REMO, is made. The model dataset was generated by dynamical downscaling from the ECMWF-ERA40 reanalysis and compared to in-situ observations. The model is able to reproduce the low-level summer monsoon circulation but it has some deficiencies in representing the South American Low-Level Jet structure. At upper levels, summer circulation features like the Bolivian High and the associated subtropical jet are well simulated by the model. Sea-level pressure fields are in general well represented by REMO. The model exhibits reasonable skill in representing the general features of the mean seasonal cycle of precipitation. Nevertheless, there is a systematic overestimation of precipitation in both tropical and subtropical regions. Differences between observed and modeled temperature are smaller than 1.5°C over most of the continent, excepting during spring when those differences are quite large. Results also show that the dynamical downscaling performed using REMO introduces some enhancement of the global reanalysis especially in temperature at the tropical regions during the warm season and in precipitation in both the subtropics and extratropics. It is then concluded that REMO can be a useful tool for regional downscaling of global simulations of present and future climates. © Springer-Verlag 2008.
format JOUR
author Silvestri, G.
Vera, C.
Jacob, D.
Pfeifer, S.
Teichmann, C.
author_facet Silvestri, G.
Vera, C.
Jacob, D.
Pfeifer, S.
Teichmann, C.
author_sort Silvestri, G.
title A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
title_short A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
title_full A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
title_fullStr A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
title_full_unstemmed A high-resolution 43-year atmospheric hindcast for South America generated with the MPI regional model
title_sort high-resolution 43-year atmospheric hindcast for south america generated with the mpi regional model
url http://hdl.handle.net/20.500.12110/paper_09307575_v32_n5_p693_Silvestri
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