Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)

This study assesses the performance of 15 high resolution global climate models (GCMs) over the complex orographic region of the subtropical central Andes from available simulations of the Fifth Coupled Model Intercomparison Project (CMIP5). The simulated past climate (1980–2005) was compared agains...

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Detalles Bibliográficos
Autor principal: Rusticucci, Matilde
Publicado: 2017
Materias:
CMIP5 models
Model evaluation
Subtropical central Andes
atmospheric circulation
climate modeling
ensemble forecasting
general circulation model
precipitation assessment
regional climate
sea level pressure
subtropical region
surface temperature
Andes
Pacific Ocean
Pacific Ocean (South)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v49_n11-12_p3937_Zazulie
http://hdl.handle.net/20.500.12110/paper_09307575_v49_n11-12_p3937_Zazulie
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09307575_v49_n11-12_p3937_Zazulie
record_format dspace
spelling paper:paper_09307575_v49_n11-12_p3937_Zazulie2023-06-08T15:52:48Z Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005) Rusticucci, Matilde CMIP5 models Model evaluation Subtropical central Andes atmospheric circulation climate modeling ensemble forecasting general circulation model precipitation assessment regional climate sea level pressure subtropical region surface temperature Andes Pacific Ocean Pacific Ocean (South) This study assesses the performance of 15 high resolution global climate models (GCMs) over the complex orographic region of the subtropical central Andes from available simulations of the Fifth Coupled Model Intercomparison Project (CMIP5). The simulated past climate (1980–2005) was compared against the Climate Research Unit (CRU) dataset and the ERA-Interim reanalysis, considered as reference datasets, to evaluate regional and seasonal surface temperature and precipitation, as well as sea level pressure and circulation. A good agreement was found between the simulations and the reference datasets for winter precipitation and for temperature over both seasons. Whilst all models correctly reproduce the annual cycle of precipitation, some of them overestimate winter totals. ERA-Interim does not adequately represent summer precipitation over the region, and some of the models analyzed also show the same deficiency. All models correctly reproduce the northward migration of the South Pacific subtropical high during winter, although some of them underestimate the maximum central pressure. During summer, most models fail to show the low level north–south flow parallel to the eastern foothills of the Andes, a feature known as the Low Level Jet. Further analysis of the results of the simulations led to the selection of a sub-set of five CMIP5 GCMs to construct a reduced ensemble. This reduced ensemble is a better representation than the multi-model mean of the 15 GCMs of the past climate at this region and would be recommended for future studies. © 2017, Springer-Verlag Berlin Heidelberg. Fil:Rusticucci, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v49_n11-12_p3937_Zazulie http://hdl.handle.net/20.500.12110/paper_09307575_v49_n11-12_p3937_Zazulie
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic CMIP5 models
Model evaluation
Subtropical central Andes
atmospheric circulation
climate modeling
ensemble forecasting
general circulation model
precipitation assessment
regional climate
sea level pressure
subtropical region
surface temperature
Andes
Pacific Ocean
Pacific Ocean (South)
spellingShingle CMIP5 models
Model evaluation
Subtropical central Andes
atmospheric circulation
climate modeling
ensemble forecasting
general circulation model
precipitation assessment
regional climate
sea level pressure
subtropical region
surface temperature
Andes
Pacific Ocean
Pacific Ocean (South)
Rusticucci, Matilde
Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
topic_facet CMIP5 models
Model evaluation
Subtropical central Andes
atmospheric circulation
climate modeling
ensemble forecasting
general circulation model
precipitation assessment
regional climate
sea level pressure
subtropical region
surface temperature
Andes
Pacific Ocean
Pacific Ocean (South)
description This study assesses the performance of 15 high resolution global climate models (GCMs) over the complex orographic region of the subtropical central Andes from available simulations of the Fifth Coupled Model Intercomparison Project (CMIP5). The simulated past climate (1980–2005) was compared against the Climate Research Unit (CRU) dataset and the ERA-Interim reanalysis, considered as reference datasets, to evaluate regional and seasonal surface temperature and precipitation, as well as sea level pressure and circulation. A good agreement was found between the simulations and the reference datasets for winter precipitation and for temperature over both seasons. Whilst all models correctly reproduce the annual cycle of precipitation, some of them overestimate winter totals. ERA-Interim does not adequately represent summer precipitation over the region, and some of the models analyzed also show the same deficiency. All models correctly reproduce the northward migration of the South Pacific subtropical high during winter, although some of them underestimate the maximum central pressure. During summer, most models fail to show the low level north–south flow parallel to the eastern foothills of the Andes, a feature known as the Low Level Jet. Further analysis of the results of the simulations led to the selection of a sub-set of five CMIP5 GCMs to construct a reduced ensemble. This reduced ensemble is a better representation than the multi-model mean of the 15 GCMs of the past climate at this region and would be recommended for future studies. © 2017, Springer-Verlag Berlin Heidelberg.
author Rusticucci, Matilde
author_facet Rusticucci, Matilde
author_sort Rusticucci, Matilde
title Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
title_short Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
title_full Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
title_fullStr Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
title_full_unstemmed Regional climate of the subtropical central Andes using high-resolution CMIP5 models—part I: past performance (1980–2005)
title_sort regional climate of the subtropical central andes using high-resolution cmip5 models—part i: past performance (1980–2005)
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307575_v49_n11-12_p3937_Zazulie
http://hdl.handle.net/20.500.12110/paper_09307575_v49_n11-12_p3937_Zazulie
work_keys_str_mv AT rusticuccimatilde regionalclimateofthesubtropicalcentralandesusinghighresolutioncmip5modelspartipastperformance19802005
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