Evaluation of two Eta Model versions for weather forecast over South America

A comparison of performance of two versions of the Eta/CPTEC model is presented. The new version is an update of an earlier operational one and includes representation of soil and vegetation types. The soil/vegetation model contains two underground layers and a canopy layer. Evaluation was carried o...

Descripción completa

Guardado en:

Detalles Bibliográficos
Publicado:	2001
Materias:	Meteorology Performance Regional modeling South America Surface processes weather forecasting
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167169_v40_n3_p219_Seluchi http://hdl.handle.net/20.500.12110/paper_00167169_v40_n3_p219_Seluchi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00167169_v40_n3_p219_Seluchi
record_format	dspace
spelling	paper:paper_00167169_v40_n3_p219_Seluchi2025-07-30T17:21:24Z Evaluation of two Eta Model versions for weather forecast over South America Meteorology Performance Regional modeling South America Surface processes weather forecasting South America A comparison of performance of two versions of the Eta/CPTEC model is presented. The new version is an update of an earlier operational one and includes representation of soil and vegetation types. The soil/vegetation model contains two underground layers and a canopy layer. Evaluation was carried out by comparing the mean and root mean square errors of several variables for an ensemble of 15 meteorological situations, using the NCEP analyses, upper air soundings and precipitation data over South America. Precipitation forecasts were evaluated by the equitable threat score (ETS) and the bias score (BIAS). The mean errors from both versions show similarities during the first 24 hours of forecast, but surface temperature is more accurately predicted by the updated model. After 48 hours, temperature and humidity forecasts show better skill in the new version too. Over subtropical South America differences are more evident in temperature and humidity, less so for geopotential heights and practically nonexistent for horizontal winds. The precipitation forecasts for the updated version have equitable threat scores slightly higher and similar bias scores during the first 24 hours. After 48 hours this version tends to overestimate the rainfall, while its spatial distribution remains unaffected. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167169_v40_n3_p219_Seluchi http://hdl.handle.net/20.500.12110/paper_00167169_v40_n3_p219_Seluchi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Meteorology Performance Regional modeling South America Surface processes weather forecasting South America
spellingShingle	Meteorology Performance Regional modeling South America Surface processes weather forecasting South America Evaluation of two Eta Model versions for weather forecast over South America
topic_facet	Meteorology Performance Regional modeling South America Surface processes weather forecasting South America
description	A comparison of performance of two versions of the Eta/CPTEC model is presented. The new version is an update of an earlier operational one and includes representation of soil and vegetation types. The soil/vegetation model contains two underground layers and a canopy layer. Evaluation was carried out by comparing the mean and root mean square errors of several variables for an ensemble of 15 meteorological situations, using the NCEP analyses, upper air soundings and precipitation data over South America. Precipitation forecasts were evaluated by the equitable threat score (ETS) and the bias score (BIAS). The mean errors from both versions show similarities during the first 24 hours of forecast, but surface temperature is more accurately predicted by the updated model. After 48 hours, temperature and humidity forecasts show better skill in the new version too. Over subtropical South America differences are more evident in temperature and humidity, less so for geopotential heights and practically nonexistent for horizontal winds. The precipitation forecasts for the updated version have equitable threat scores slightly higher and similar bias scores during the first 24 hours. After 48 hours this version tends to overestimate the rainfall, while its spatial distribution remains unaffected.
title	Evaluation of two Eta Model versions for weather forecast over South America
title_short	Evaluation of two Eta Model versions for weather forecast over South America
title_full	Evaluation of two Eta Model versions for weather forecast over South America
title_fullStr	Evaluation of two Eta Model versions for weather forecast over South America
title_full_unstemmed	Evaluation of two Eta Model versions for weather forecast over South America
title_sort	evaluation of two eta model versions for weather forecast over south america
publishDate	2001
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167169_v40_n3_p219_Seluchi http://hdl.handle.net/20.500.12110/paper_00167169_v40_n3_p219_Seluchi
_version_	1840320943621144576

Evaluation of two Eta Model versions for weather forecast over South America

Ejemplares similares