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Encontro de Energia no Meio Rural



Abstract

TIBA, Chigueru and LEAL, Sergio da S. A. Medidas e modelagem da radiação par para o nordeste do Brasil. In Procedings of the 5th Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [cited 30 May 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000200016&lng=en&nrm=iso> .

Photosynthetically active solar radiation, known by its acronym in the English language as PAR, is the principal driving force of innumerable biological and physical processes related to biomass production, suchs as, the evolution of vegetal covering, agricultural productivity, and countless ambiental aspects, among others. Unfortunately in Brazil and particularly in the Northeast of Brazil, the PAR radiation measures are not a routine part of meteorological station measures, and therefore are still rarer than solar irradiation measures. In this context, a station was installed in Recife, Pernambuco in 2003, to carry out simultaneous measures of daily solar irradiation and PAR irradiation, wich permits the modelling and valuation of the relationship between these two parameters and thus makes the estimation of PAR radiation possible, where there used to be only information on solar irradiation. Three others stations are being installed, one on Fernando de Noronha-PE, another in Pesqueira-PE, and the other in Xingó-SE, which complete a group of 4 between Latitudes 8° and 10° South and Longitudes 34° to 38° West, each having differentiated Equatorial Climates: island maritime, continental maritime, sylvan (Agreste)and semi-arid.

Keywords : energia solar; radiação solar par; estimação da radiação par.

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