Estimating Monthly Solar Radiation in South-Central Chile

Solar radiation is a key component in process-based models. The amount of this energy depends on the location, time of the year, and atmospheric conditions. Several equations and models have been developed for different conditions using historical data from weather station networks or satellite meas...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Álvarez,José, Mitasova,Helena, Allen,H. Lee
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2011
Materias:	Solar radiation r. sun model
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400016
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-58392011000400016
record_format	dspace
spelling	oai:scielo:S0718-583920110004000162018-10-01Estimating Monthly Solar Radiation in South-Central ChileÁlvarez,JoséMitasova,HelenaAllen,H. Lee Solar radiation r. sun model Solar radiation is a key component in process-based models. The amount of this energy depends on the location, time of the year, and atmospheric conditions. Several equations and models have been developed for different conditions using historical data from weather station networks or satellite measurements. However, solar radiation estimates are too local since they rely on weather stations or have a resolution that is too coarse when working with satellites. In this study, we estimated monthly global solar radiation for the south-central region of Chile using the r.sun model and validated it with observations from automatic weather stations. We analyzed the performance of global radiation results with the Hargreaves-Samani (HS) and Bristow-Campbell (BC) models. Estimates from a calibrated rsun model accounted for 89% of the variance (r² = 0.89) in monthly mean values for 15 locations in the research area. The model performed very well for a wide area and conditions in Chile when we compared it with the HS and BC models. Our estimates of global solar radiation using the rsun model could be improved through calibration of ground measurements and more precise cloudiness estimates as they become available. With additional procedures, the rsun model could be used to provide spatial estimates of daily, weekly, monthly, and yearly solar radiation.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.71 n.4 20112011-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400016en10.4067/S0718-58392011000400016
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Solar radiation r. sun model
spellingShingle	Solar radiation r. sun model Álvarez,José Mitasova,Helena Allen,H. Lee Estimating Monthly Solar Radiation in South-Central Chile
description	Solar radiation is a key component in process-based models. The amount of this energy depends on the location, time of the year, and atmospheric conditions. Several equations and models have been developed for different conditions using historical data from weather station networks or satellite measurements. However, solar radiation estimates are too local since they rely on weather stations or have a resolution that is too coarse when working with satellites. In this study, we estimated monthly global solar radiation for the south-central region of Chile using the r.sun model and validated it with observations from automatic weather stations. We analyzed the performance of global radiation results with the Hargreaves-Samani (HS) and Bristow-Campbell (BC) models. Estimates from a calibrated rsun model accounted for 89% of the variance (r² = 0.89) in monthly mean values for 15 locations in the research area. The model performed very well for a wide area and conditions in Chile when we compared it with the HS and BC models. Our estimates of global solar radiation using the rsun model could be improved through calibration of ground measurements and more precise cloudiness estimates as they become available. With additional procedures, the rsun model could be used to provide spatial estimates of daily, weekly, monthly, and yearly solar radiation.
author	Álvarez,José Mitasova,Helena Allen,H. Lee
author_facet	Álvarez,José Mitasova,Helena Allen,H. Lee
author_sort	Álvarez,José
title	Estimating Monthly Solar Radiation in South-Central Chile
title_short	Estimating Monthly Solar Radiation in South-Central Chile
title_full	Estimating Monthly Solar Radiation in South-Central Chile
title_fullStr	Estimating Monthly Solar Radiation in South-Central Chile
title_full_unstemmed	Estimating Monthly Solar Radiation in South-Central Chile
title_sort	estimating monthly solar radiation in south-central chile
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400016
work_keys_str_mv	AT alvarezjose estimatingmonthlysolarradiationinsouthcentralchile AT mitasovahelena estimatingmonthlysolarradiationinsouthcentralchile AT allenhlee estimatingmonthlysolarradiationinsouthcentralchile
_version_	1714205303705174016

Estimating Monthly Solar Radiation in South-Central Chile

Ejemplares similares