Vegetation of the Olokemeji Forest Reserve, Nigeria: II. The Climate with Special Reference to its Seasonal Changes

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Abstract
The climate of the Olokemeji Forest Reserve, which lies across the forest/derived savanna boundary in south-western Nigeria, is described and shown to be typical of its geographical and ecological positions. Southwesterly winds predominate throughout the year and account for the generally humid climate. The mean annual rainfall is 1232 [plus or minus] 61 mm and the mean annual number of raindays is 107 [plus or minus] 5. The seasonal graphs of rainfall, rain days and rainfall per rain day are all of the double maximum type: the wet season lasts from March to October and there is a little dry season during August. The longest dry spell during the dry season averages over 70 days. Shade temperature, saturation deficit, daily sunshine and solar radiation all show distinct seasonal changes with maxima in February/March and minima in July/August.

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