A New Index Assessing the Viability of PAR Application Projects Used to Validate PAR Models

Ferrera Cobos, Francisco and Vindel, Jose María and Valenzuela, Rita Ximena (2021). A New Index Assessing the Viability of PAR Application Projects Used to Validate PAR Models. "Agronomy", v. 11 ; pp. 470-487. ISSN 2073-4395. https://doi.org/10.3390/agronomy11030470.

Description

Title: A New Index Assessing the Viability of PAR Application Projects Used to Validate PAR Models
Author/s:
  • Ferrera Cobos, Francisco
  • Vindel, Jose María
  • Valenzuela, Rita Ximena
Item Type: Article
Journal/Publication Title: Agronomy
Date: March 2021
ISSN: 2073-4395
Volume: 11
Subjects:
Freetext Keywords: photosynthetically active radiation (PAR); Exceedance Probability Index (EPI); global horizontal irradiance (GHI); MODIS
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Photosynthetically active radiation (PAR) is a useful variable to estimate the growth of biomass or microalgae. However, it is not always feasible to access PAR measurements; in this work, two sets of nine hourly PAR models were developed. These models were estimated for mainland Spain from satellite data, using multilinear regressions and artificial neural networks. The variables utilized were combinations of global horizontal irradiance, clearness index, solar zenith angle cosine, relative humidity, and air temperature. The study territory was divided into regions with similar features regarding PAR through clustering of the PAR clearness index (kPAR). This methodology allowed PAR modeling for the two main climatic regions in mainland Spain (Oceanic and Mediterranean). MODIS 3 h data were employed to train the models, and PAR data registered in seven stations across Spain were used for validation. Usual validation indices assess the extent to which the models reproduce the observed data. However, none of those indices considers the exceedance probabilities, which allow the assessment of the viability of projects based on the data to be modeled. In this work, a new validation index based on these probabilities is presented. Hence, its use, along with the other indices, provides a double and thus more complete validation.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainCGL2016-79284-PUnspecifiedUnspecifiedDesarrollo de una red de medidas, modelización, base de datos y servicio web de mapas de la radiación fotosintéticamente activa
Madrid Regional GovernmentS2018/BAA-4532ALGATEC-CMUnspecifiedDesarrollo de tecnologías avanzadas de microalgas para una economía circular
Government of SpainBES-2017-082043UnspecifiedUnspecifiedUnspecified

More information

Item ID: 66320
DC Identifier: http://oa.upm.es/66320/
OAI Identifier: oai:oa.upm.es:66320
DOI: 10.3390/agronomy11030470
Official URL: https://www.mdpi.com/2073-4395/11/3/470
Deposited by: Memoria Investigacion
Deposited on: 19 Apr 2021 07:23
Last Modified: 20 May 2021 13:57
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