The Nigerian Micrometeorological Experiment (NIMEX-1): an overview

  • OO Jegede Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria
  • M Maunder Department of Micrometeorology, University of Bayreuth, D-95440 Bayreuth, Germany
  • EC Okogbue Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • T Foken Department of Micrometeorology, University of Bayreuth, D-95440 Bayreuth, Germany
  • EE Balogun Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria and Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • JA Adedokun Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria
  • EO Oladiran Department of Physics, University of Ibadan, Ibadan, Nigeria
  • JA Omotosho Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • AA Balogun Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • OR Oladosu Department of Physics, Federal University of Technology, PMB 704 Akure, Nigeria
  • LA Sunmonu Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria
  • MA Ayoola Department of Physics, University of Ibadan, Ibadan, Nigeria
  • TO Aregbesola Institute of Education, Obafemi Awolowo University, Ile-Ife, Nigeria
  • EO Ogolo Department of Physics, Federal University of Technology, PMB 704 Akure, Nigeria
  • EF Nymphas Department of Physics, University of Ibadan, Ibadan, Nigeria
  • MO Adeniyi Department of Physics, University of Ibadan, Ibadan, Nigeria
  • GI Olatona Department of Physics, Osun State College of Education, Ilesa, Osun State, Nigeria
  • KO Ladipo Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • SI Ohamobi Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • EO Gbobaniyi Department of Meteorology, Federal University of Technology, PMB 704 Akure, Nigeria
  • GO Akinlade Department of Physics, Obafemi Awolowo University, Ile-Ife, Nigeria

Abstract

The first phase of the Nigerian Micrometeorological Experiment (NIMEX-1) was concluded between 15 February and 10 March 2004, at an agricultural site within the campus of Obafemi Awolowo University in Ile-Ife, Nigeria (7o33\'N, 4o33\'E). The multi-institutional project was aimed at determining the surface energy balance of a tropical wet and dry location in West Africa. The field observations made fell within a transition from the dry to wet season in the area, and as such, the surface conditions varied in extremes. An integrated measurement system comprising of various micrometeorological sensors was deployed to record the mean and turbulence parameters in the surface layers separately. A number of methodologies viz: the eddy covariance (EC), Bowen ratio energy balance (BREB), and modified Bowen ratio (MBR) systems, used to determine magnitudes of the surface fluxes; sensible and latent heats, were compared. Generally, there is a consistency of their diurnal trends but the BREB method overestimated the surface fluxes up to about 30%. The radiation balance indicated that the incoming shortwave is dominant during daytime and is mainly responsible for the surface forcings. The non-closure of the energy balance obtained at the surface, typically, was less than 25%.
Ife Journal of Science Vol.6(2) 2004: 191-202
Published
2005-02-04
Section
Articles

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eISSN: 0794-4896