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Journal Article: BibTeX citation key:  Abdou2009a
Abdou, K., Parker, D. J., Brooks, B., Kalthoff, N. & Lebel, T. (2009) The diurnal cycle of lower boundary layer wind in the West African monsoon. IN Quarterly Journal of the Royal Meteorological Society, 136. 66–76.
Added by: Devic 2009-03-03 11:11:04    Last Edited by: Fanny Lefebvre 2010-11-02 16:47:25
 B  
Categories: General
Creators: Abdou, Brooks, Kalthoff, Lebel, Parker
Collection: Quarterly Journal of the Royal Meteorological Society
Bibliographies: Prior150410

Peer reviewed
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Abstract
Measurements of lower boundary layer winds collected from four sodar systems during the African Monsoon Multidisciplinary Analysis (AMMA) are presented. The sodars were located in a mesoscale network in the vicinity of Niamey, Niger, in the period 31 May to 17 August 2006: from this network 41 days of good measurements have been obtained from at least one of the sodars, while there are several days in which two or more sodars produced good simultaneous data. The average variation of the winds in the lower boundary layer is here presented, as a function of height and of time of day. The results confirm previous studies of the diurnal cycle of winds, and quantify the variation of this diurnal cycle with height at low altitudes. In particular, the magnitude of low-level wind shear, which is a significant hazard for aviation, is shown to be strongly dependent on time of day.
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Last Edited by: Fanny Lefebvre