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Archives of Current Research International, ISSN: 2454-7077,Vol.: 9, Issue.: 3

Original-research-article

The Influence of Meteorological Parameters on Atmospheric Visibility over Ikeja, Nigeria

 

D. O. Akpootu1*, M. I. Iliyasu2, W. Mustapha3, S. Aruna4 and S. O. Yusuf5

1Department of Physics, Usmanu Danfodiyo University, Sokoto, Nigeria.

2Physics Unit, Sokoto State Polytechnic, Sokoto, Nigeria.

3Nigerian Meteorological Agency (NIMET), Abuja, Nigeria.

4Department of Science, La Salle College, Ondo, Ondo State, Nigeria.

5Department of Physics, Arthur Jarvis University, Calabar, Cross River State, Nigeria.

Article Information
Editor(s):
(1) Preecha Yupapin, Department of Physics, King Mongkut’s Institute of Technology Ladkrabang, Thailand.
Reviewers:
(1) Johnson Orfega Mage, Benue State University, Nigeria.
(2) Chin-Hsiang Luo, Hungkuang University, Taiwan.
(3) Sergei Soldatenko, Institute for Informatics and Automation of the Russian Academy of Sciences, Laboratory of Applied Informatics, Russia.
Complete Peer review History: http://www.sciencedomain.org/review-history/20892

Abstracts

This present study investigates the variation of atmospheric visibility with meteorological parameters of measured monthly average daily visibility, mean temperature, relative humidity, atmospheric pressure, rainfall and wind speed for a period of 12-years over Ikeja, Lagos State, South Western, Nigeria (Latitude 6.58°N, Longitude 3.33°E and altitude 40 m above sea level). The results indicated that the seasonal variation of atmospheric visibility is greater during the rainy season than in the dry season. The best visibility was observed during the rainy season with an average value of 9.73 km in the month of April while the worst visibility was during the dry season with an average value of 5.88 km in the month of January. The results from regular observation of atmospheric visibility for the study area during the period under investigation indicated that the observed visibility ranged between 5.88 ± 1.03 km and 9.73 ± 1.03 km with annual mean of 8.68 ± 1.03 km which implies that the atmosphere is mostly clear. The average atmospheric extinction coefficient computed for the study area is approximately 0.4628 km-1 (4.628 × 10-4m-1). Simple linear regression equation relating the atmospheric visibility and the meteorological parameters were developed from which the regression equation relating atmospheric visibility with relative humidity was recommended based on the coefficient of correlation (R), coefficient of determination (R2), standard error of estimates (SEE) and p-value. The skewness and kurtosis for the atmospheric visibility are negatively skewed with value -1.514 and positive kurtosis (leptokurtic distribution) with value 1.244.

Keywords :

Atmospheric visibility; extinction coefficient; meteorological parameters; skewness and kurtosis; rainy and dry seasons.

Full Article - PDF    Page 1-12

DOI : 10.9734/ACRI/2017/36010

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