Analysis of Photosynthetically Active Radiation over Six Tropical Ecological Zones in Nigeria
Sunday E. Etuk, Nwokolo C. Samuel, Okechukwu E. Agbasi, John- Jaja A. Sylvia
Journal of Geography, Environment and Earth Science International · pp. 1–15 · Published 12 Oct 2016
10.9734/JGEESI/2016/27945Abstract
This study was designed to proposed a multivariate model of monthly mean daily Photo synthetically active radiation (PAR) from the constant ratio of the global solar radiation for six selected tropical ecological zones between 4.40°N and 13.03°N of Nigeria (Port Harcourt, Enugu, Abeokuta, Ilorin, Bauchi and Sokoto). The measured global solar radiation data was obtained from the Archives of the Nigerian Meteorological Agency, Oshodi, Lagos, over a period of thirteen years (2000-2012). The estimation was based on a correlation between clearance index, PAR and extraterrestrial computed using generalized 45% and 40% of monthly mean daily data set of global solar radiation and extraterrestrial solar radiation respectively on horizontal surfaces. The performance of the models developed were tested for validation using mean bias error (MBE), root mean square error (RMSE), mean percentage error (MPE), Nash-Sutcliff equation (NSE), chi squares (χ2) and index of agreement (d). The polynomial regression model developed to estimate PAR judging from the model performance and validation test indicates that the proposed model could be used to estimate PAR in six tropical ecological zones in Nigeria and other stations with similar climatological conditions across the globe. The paper also revealed that there is an apparent increase in the magnitude of PAR and clearness index along tropical belts as a result of the movement of the Hadley cell circulatory system along the equatorial line from the Sahel Savannah to the Mangrove Swamp belt.
References (23)
- 1 Time Series Analysis Forecasting and Control. [DOI]
- 2 An Introduction to Solar Radiation [DOI]
- 3 Time series analysis forecasting and control [DOI]
- 4 Probability, statistics, and decision for civil engineers
- 5 Probability, Statistics and Decision for Civil Engineers. [DOI]
- 6 Principle of environmental physics
- 7 Modeling hourly and daily fractions of UV, PAR and NIR to global solar radiation under various sky conditions at Botucatu, Brazil [DOI]
- 8 Photosynthetically active radiation: measurements and modelling [DOI]
- 9 Relationships of photosynthetically active radiation and shortwave irradiance [DOI]
- 10 Global photosynthetically active radiation and its relationship with global solar radiation in the Eastern Mediterranean basin [DOI]
- 11 Proposed standard solar-radiation curves for engineering use [DOI]
- 12 Solar Radiation for Plant Growth [DOI]
- 13 Relationships of photosynthetically active radiation and shortwave irradiance [DOI]
- 14 Relationships between photosynthetically active radiation and clearness index at Bloemfontein, South Africa [DOI]
- 15 Global PAR related to global solar radiation for central Nigeria [DOI]
- 16 Photosynthetically active components of global solar radiation: Measurements and model computations [DOI]
- 17 Solar Energy Fundamentals and Modeling Techniques [DOI]
- 18 Calculation of monthly average global solar radiation on horizontal surfaces using daily hours of bright sunshine [DOI]
- 19 Monthly ratios of PAR to global solar radiation measured at northern Tibetan Plateau, China [DOI]
- 20 Prediction of global solar radiation using relative humidity, maximumtemperature and sunshine hours in Uyo, in the Niger Delta Region, Nigeria
- 21 Validation of an empirical model for photosynthetically active radiation [DOI]
- 22 Correlation of Global Solar Irradiance with some Meteorological Parameters and Validation of some Existing Solar Radiation Models with Measured Data Over Selected Climatic Zones In Nigeria. [DOI]
- 23 Correlation of Global Solar Irradiance with some Meteorological Parameters and Validation of some Existing Solar Radiation Models with Measured Data Over Selected Climatic Zones In Nigeria. [DOI]
Cited by 25
Samuel Chukwujindu Nwokolo, Julie C. Ogbulezie · Renewable and Sustainable Energy Reviews · 2018
Filippo Ferlito, Elisabetta Nicolosi, Angelo Sicilia · Horticulturae · 2023
Davidson Odafe Akpootu, Abdullahi Kware Isah, Abdullahi Yusuf · European Journal of Theoretical and Applied Sciences · 2024
D. O. Akpootu, A. K. Isah, M. K. Abdulsalam · Journal of Energy Research and Reviews · 2023
Ufuk Beyaztas, Sinan Q. Salih, Kwok-Wing Chau · Engineering Applications of Computational Fluid Mechanics · 2019
Samuel Chukwujindu Nwokolo, Nikolaos Proutsos, Edson L. Meyer · Atmosphere · 2023
Samuel Chukwujindu Nwokolo, Julie C. Ogbulezie · Beni-Suef University Journal of Basic and Applied Sciences · 2018
Nwokolo Samuel Chukwujindu · Renewable and Sustainable Energy Reviews · 2017
Samuel Chukwujindu Nwokolo, Rubee Singh, Shahbaz Khan · CSR, Sustainability, Ethics & Governance · 2023
Showing 9 of 25 known citations — external sources report more than can currently be individually listed.
Related research
- First Trimester Fasting Blood Glucose as a Screening Tool for Diabetes Mellitus in a Teaching Hospital Setting in Nigeria — shares topic coverage
- The Nature and Complications of Acute Traumatic Cervical Spinal Cord Injury in a University Hospital in Nigeria — shares topic coverage
- Musculoskeletal Complications of Sickle Cell Anaemia and Their Management Approaches in Makurdi, Nigeria — shares topic coverage
- Work-related Musculoskeletal Disorders among Radiologists in Nigeria — shares topic coverage
- The Skills of Cardiopulmonary Resuscitation in Some Professional and Student Teachers Compared — shares topic coverage
Article metrics
Real usage data collected on this platform.
56
Page views
0
PDF downloads
38
Outbound clicks
25
Citations
Views over time
Views by country
Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".
Traffic sources
Referring site, by host.
Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.