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Analysis of Influence Factors on Clearness Index for the City of Fortaleza

by Indira Ponte Ribeiro, Jonas Platini Reges, Pietro Christof Freitas Andrade, Erika Da Justa Teixeira Rocha, Auzuir Ripardo De Alexandria
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 181 - Number 31
Year of Publication: 2018
Authors: Indira Ponte Ribeiro, Jonas Platini Reges, Pietro Christof Freitas Andrade, Erika Da Justa Teixeira Rocha, Auzuir Ripardo De Alexandria
10.5120/ijca2018918223

Indira Ponte Ribeiro, Jonas Platini Reges, Pietro Christof Freitas Andrade, Erika Da Justa Teixeira Rocha, Auzuir Ripardo De Alexandria . Analysis of Influence Factors on Clearness Index for the City of Fortaleza. International Journal of Computer Applications. 181, 31 ( Dec 2018), 1-4. DOI=10.5120/ijca2018918223

@article{ 10.5120/ijca2018918223,
author = { Indira Ponte Ribeiro, Jonas Platini Reges, Pietro Christof Freitas Andrade, Erika Da Justa Teixeira Rocha, Auzuir Ripardo De Alexandria },
title = { Analysis of Influence Factors on Clearness Index for the City of Fortaleza },
journal = { International Journal of Computer Applications },
issue_date = { Dec 2018 },
volume = { 181 },
number = { 31 },
month = { Dec },
year = { 2018 },
issn = { 0975-8887 },
pages = { 1-4 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume181/number31/30183-2018918223/ },
doi = { 10.5120/ijca2018918223 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-07T01:07:46.961886+05:30
%A Indira Ponte Ribeiro
%A Jonas Platini Reges
%A Pietro Christof Freitas Andrade
%A Erika Da Justa Teixeira Rocha
%A Auzuir Ripardo De Alexandria
%T Analysis of Influence Factors on Clearness Index for the City of Fortaleza
%J International Journal of Computer Applications
%@ 0975-8887
%V 181
%N 31
%P 1-4
%D 2018
%I Foundation of Computer Science (FCS), NY, USA
Abstract

This paper aims to analyze the influence of internal factors in the sun and Earth’s atmosphere, represented by the International Sunspot Number and cloudiness, respectively, in the value of the clearness index, given by the relation between the incident radiation on the surface and at the top of the atmosphere, over a solar cycle, for the city of Fortaleza. The data of insulation hours and cloudiness were obtained from the National Institute of Meteorology and the International Sunspot Number from the Sunspot Index and Long-term Solar Observations. From these data, we calculated the annual average clearness index using the A˜ ngstrom- Prescott equation and a comparison was made with the average cloudiness and the solar activity. The results showed a great influence by the cloudiness (-0.808) and very little by the solar activity. However, it also shows that the clearness index (0.187) presents in most of the cycle a behavior similar to that of solar activity.

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Index Terms

Computer Science
Information Sciences

Keywords

Clearness index Cloudiness Solar activity A˜ ngstrom-Prescott equation

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