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Full Length Research
Paper
Analysis of some
meteorological data for some selected cities in the Eastern
and Southern zone of Nigeria
C. Augustine* and M. N. Nnabuchi
Department of Industrial Physics, Ebonyi State
University, Abakaliki, Nigeria.
*Corresponding author. E-mail:
emmyaustine2003@yahoo.com.
Accepted 4 January, 2010 |
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The monthly mean daily global solar radiation,
sunshine duration hours, maximum temperature, Cloudiness
index and relative humidity data for some selected cities in
the Eastern and Southern zone of Nigeria covering a period
of seventeen years (1990 - 2007) were used to generate
several linear and multilinear regression equations. The
values of the solar radiation estimated by the equations and
the measured solar radiation were tested using the mean bias
error (MBE), root mean square error (RMSE) and mean
percentage error (MPE) statistical techniques. The values of
the correlation coefficient (R) and coefficient of
correlation (R2) were also determined for each
equation. The equations with the highest values of R, R2
and least values of MBE, RMSE and MPE are suitable for
predicting global solar radiation in the Eastern and
Southern part of Nigeria. The developed equations can be
used for estimating solar radiation in other locations with
similar geographical information.
Key words:
Cloudiness index, solar radiation, sunshine hours, relative
humidity, maximum temperature.
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