Thermally induced wind patterns in the Sahelian city of Ouagadougou, Burkina Faso |
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| Authors: | Jenny Lind??n Bj?rn Holmer |
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| Institution: | 1. Urban Climate Group, Department of Earth Sciences, University of Gothenburg, Box?460, 40530, Gothenburg, Sweden
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| Abstract: | The urban surface wind field in the dry-tropical city of Ouagadougou, Burkina Faso was studied based on data collected at one urban and one suburban station during early dry season. An intra-urban thermal breeze, creating almost opposite wind directions at the two sites, was found during nights with high atmospheric stability. The high atmospheric stability suggests a decoupling of the surface wind layer from the layer above, allowing the wind system to develop due to the strong intra-urban temperature gradients in the city. Frequent temporary breakdowns of the thermal wind system were noticed, generally generating a turn in wind direction towards that of the regional wind, thus indicating a re-coupling with a stronger wind flow in the wind layer above. |
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