Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach

A collection of 10 high-impact extreme precipitation events occurring in Southeastern South America during the warm season has been analyzed using statistical (ESD) and dynamical downscaling approaches. Regional Climate Models from the CORDEX database for the South American domain at two horizontal...

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Autores principales: Solman, Silvina, Bettolli, María Laura, Doyle, Moira, Olmo, Matías, Feijoo, Martín, Martínez, Daina, Blázquez, Josefina, Balmaceda Huarte, Rocío
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Geofísica
Extreme precipitation events
Southeastern South America
Statistical and dynamical downscaling
Convective permitting simulations
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/160180
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-160180
record_format dspace
spelling I19-R120-10915-1601802023-11-15T20:06:26Z http://sedici.unlp.edu.ar/handle/10915/160180 Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach Solman, Silvina Bettolli, María Laura Doyle, Moira Olmo, Matías Feijoo, Martín Martínez, Daina Blázquez, Josefina Balmaceda Huarte, Rocío 2021-04-23 2023-11-15T14:40:27Z en Geofísica Extreme precipitation events Southeastern South America Statistical and dynamical downscaling Convective permitting simulations A collection of 10 high-impact extreme precipitation events occurring in Southeastern South America during the warm season has been analyzed using statistical (ESD) and dynamical downscaling approaches. Regional Climate Models from the CORDEX database for the South American domain at two horizontal resolutions, 50 km and 25 km, short-term simulationsat 20 km and at 4 km convective-permitting resolution and statistical downscaling techniques based on the analogue method and the generalized linear model approach were evaluated. The analysis includes observational datasets based on gridded data, station data and satellite products that allow assessing the observational uncertainty that characterizes extreme events in the region. It is found that the ability of the modelling strategies in capturing the main features of the extreme rainfall varies across the events. The higher the horizontal resolution of the models, the more intense and localized the core of the rainfall event, being the location of the exit region of the low-level jet and the low-level moisture flux convergence during the initial stages of the events the most relevant features that determine models? ability of capturing the location and intensity of the core of the heavy rainfall. ESD models based on the generalized linear approach overestimate the spatial extension of the events and underestimate the intensity of the local maxima. Weather-like convective-permitting simulations depict an overall good performance in reproducing both the rainfall patterns and the triggering mechanisms of the extreme events as expected, given that these simulations are strongly controlled by the initial conditions. Facultad de Ciencias Astronómicas y Geofísicas Universidad de Buenos Aires Consejo Nacional de Investigaciones Científicas y Técnicas Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf 1241-1264
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
Extreme precipitation events
Southeastern South America
Statistical and dynamical downscaling
Convective permitting simulations
spellingShingle Geofísica
Extreme precipitation events
Southeastern South America
Statistical and dynamical downscaling
Convective permitting simulations
Solman, Silvina
Bettolli, María Laura
Doyle, Moira
Olmo, Matías
Feijoo, Martín
Martínez, Daina
Blázquez, Josefina
Balmaceda Huarte, Rocío
Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
topic_facet Geofísica
Extreme precipitation events
Southeastern South America
Statistical and dynamical downscaling
Convective permitting simulations
description A collection of 10 high-impact extreme precipitation events occurring in Southeastern South America during the warm season has been analyzed using statistical (ESD) and dynamical downscaling approaches. Regional Climate Models from the CORDEX database for the South American domain at two horizontal resolutions, 50 km and 25 km, short-term simulationsat 20 km and at 4 km convective-permitting resolution and statistical downscaling techniques based on the analogue method and the generalized linear model approach were evaluated. The analysis includes observational datasets based on gridded data, station data and satellite products that allow assessing the observational uncertainty that characterizes extreme events in the region. It is found that the ability of the modelling strategies in capturing the main features of the extreme rainfall varies across the events. The higher the horizontal resolution of the models, the more intense and localized the core of the rainfall event, being the location of the exit region of the low-level jet and the low-level moisture flux convergence during the initial stages of the events the most relevant features that determine models? ability of capturing the location and intensity of the core of the heavy rainfall. ESD models based on the generalized linear approach overestimate the spatial extension of the events and underestimate the intensity of the local maxima. Weather-like convective-permitting simulations depict an overall good performance in reproducing both the rainfall patterns and the triggering mechanisms of the extreme events as expected, given that these simulations are strongly controlled by the initial conditions.
format Articulo
Articulo
author Solman, Silvina
Bettolli, María Laura
Doyle, Moira
Olmo, Matías
Feijoo, Martín
Martínez, Daina
Blázquez, Josefina
Balmaceda Huarte, Rocío
author_facet Solman, Silvina
Bettolli, María Laura
Doyle, Moira
Olmo, Matías
Feijoo, Martín
Martínez, Daina
Blázquez, Josefina
Balmaceda Huarte, Rocío
author_sort Solman, Silvina
title Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
title_short Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
title_full Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
title_fullStr Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
title_full_unstemmed Evaluation of multiple downscaling tools for simulating extreme precipitation events over Southeastern South America: a case study approach
title_sort evaluation of multiple downscaling tools for simulating extreme precipitation events over southeastern south america: a case study approach
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/160180
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