Developing Regression Models for Estimating Atmospheric Visibility over Ikeja, Nigeria
Journal Title: Journal of Scientific Research and Reports - Year 2017, Vol 15, Issue 6
Abstract
In this study, the meteorological parameters of measured monthly average daily visibility, mean temperature, relative humidity, atmospheric pressure, rainfall and wind speed covering a period of 12-years were utilized to develop and evaluate one, two, three, four and five variable correlation models for the estimation of atmospheric visibility for Ikeja, Lagos State, South Western, Nigeria (Latitude 6.58°N, Longitude 3.33°E and altitude 40 m above sea level). The accuracy of the newly proposed models for all the variable correlations are statistically tested using correlation coefficient (R), coefficient of determination (R2), Mean Bias Error (MBE), Root Mean Square Error (RMSE), Mean Percentage Error (MPE) and t-test. Based on the overall results, the four variable visibility models relating the relative humidity, atmospheric pressure, rainfall and wind speed was recommended having the highest values of R (98.9%), R2 (97.9%) and the lowest values of RMSE (0.1821 km) and MPE (0.4025%). The one variable visibility model relating the rainfall was recommended based on the lowest values of MBE (0.0012 km) and t-test (0.0038). The results of this study revealed that despite the very high values of R and R2 for the five variable correlation model, it is not appropriate for visibility estimation as it has very high values of MBE, RMSE, MPE and t-test as compared to other estimated models with high overestimation of the measured visibility values. The newly recommended visibility models can be used for estimating daily and monthly visibility with higher accuracy for Ikeja and regions with similar climatic information.
Authors and Affiliations
D. O. Akpootu, M. I. Iliyasu, W. Mustapha, S. Aruna, S. O. Yusuf
Keywords
Related Articles
- EP ID EP326574
- DOI 10.9734/JSRR/2017/36670
- Views 94
- Downloads 0
Factors Affect to Green Products Purchase Behavior of Young Educated Consumers in Sri Lanka
Aims: At present, rapid development of technology has caused both positive or negative influence and changes in the environment. While enjoying the convenience provided by technology, people should have the right mind-se...
Science and Technology: A Catalyst for Improving Human Health in Developing Countries
Science and technology have the potential to make major contributions to the development of medical devices that can help address the highest burdens of diseases in developing countries. This paper examined how science a...
Phytochemical Properties, Proximate and Mineral Composition of Curcuma longa Linn. and Zingiber officinale Rosc.: A Comparative Study
Aims: To investigate the phytochemical property, proximate and mineral composition of Curcuma longa and Zingiber officinale dried rhizomes. Study Design: Activity directed phytochemical screening, proximate analysis and...
Pressure Effect on Magnetic Properties of Isotropic Nd-Fe-B Resin Bonded Magnets for Automotive Sector Applications
Aims: The purpose of this work is to study the effect of compression pressure on isotropic epoxy resin bonded Nd-Fe-B magnets, with the goal of achieving high densities at room temperature. Methodology: We present data o...
Phytochemical and Chemical Properties of Raw, Cooked and Dried Seeds of Buchholzia coriacea
The qualitative phytochemical analysis of water and methanolic extracts of dried seed of Buchholzia coriacea, proximate composition and mineral contents of raw, cooked and dried seed samples were determined using standar...