Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere
The characteristics of the wind vertical profile over the coast of Cotonou during wind convective diurnal cycle were explored in this study. Wind data at 10 m above the ground and the radiosonde data in the lower 60 m of the surface boundary layer were used over the period from January 2013 to Decem...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/7530828 |
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| author | Hagninou E. V. Donnou Aristide B. Akpo Clément A. Kouchadé Basile B. Kounouhewa Guy H. Hounguè Gbènoukpo F. Nonfodji Julien Djossou |
| author_facet | Hagninou E. V. Donnou Aristide B. Akpo Clément A. Kouchadé Basile B. Kounouhewa Guy H. Hounguè Gbènoukpo F. Nonfodji Julien Djossou |
| author_sort | Hagninou E. V. Donnou |
| collection | DOAJ |
| description | The characteristics of the wind vertical profile over the coast of Cotonou during wind convective diurnal cycle were explored in this study. Wind data at 10 m above the ground and the radiosonde data in the lower 60 m of the surface boundary layer were used over the period from January 2013 to December 2016. Based on Monin–Obukhov theory, the logarithmic and power laws have allowed characterizing the wind profile. The error estimators of the Root Mean Square Error (RMSE) and the Mean Absolute Error (MAE) were, respectively, evaluated at 0.025; 0.016 (RMSE; MAE) and 0.018; 0.015. At the site of Cotonou, the atmosphere is generally unstable from 09:00 to 18:00 MST and stable for the remainder of the time. The annual mean value of the wind shear coefficient is estimated at 0.20 and that of the ground surface roughness length and friction velocity are, respectively, of 0.007 m, 0.38 m·s−1. A comparative study between the wind extrapolation models and the data was carried out in order to test their reliability on our study site. The result of this is that whatever the time of the year is, only the models proposed (best fitting equation) are always in good agreement with the data unlike the other models evaluated. Finally, from the models suitable for our site, the profile of wind convective diurnal cycle was obtained by extrapolation of the wind data measured at 10 m from the ground. The average wind speed during this cycle is therefore evaluated to 8.07 m·s−1 for August which is the windiest month and to 4.98 m·s−1 for the least windy month (November) at 60 m of the ground. Considering these results, we can so consider that the site of Cotonou coastal could be suitable for the installation of wind turbines. |
| format | Article |
| id | doaj-art-6927c12a76504acfab62f2ce34acfe4b |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-6927c12a76504acfab62f2ce34acfe4b2025-02-03T06:12:08ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/75308287530828Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective AtmosphereHagninou E. V. Donnou0Aristide B. Akpo1Clément A. Kouchadé2Basile B. Kounouhewa3Guy H. Hounguè4Gbènoukpo F. Nonfodji5Julien Djossou6Laboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninLaboratoire de la Physique du Rayonnement, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 01 B.P. 526, Cotonou, BeninThe characteristics of the wind vertical profile over the coast of Cotonou during wind convective diurnal cycle were explored in this study. Wind data at 10 m above the ground and the radiosonde data in the lower 60 m of the surface boundary layer were used over the period from January 2013 to December 2016. Based on Monin–Obukhov theory, the logarithmic and power laws have allowed characterizing the wind profile. The error estimators of the Root Mean Square Error (RMSE) and the Mean Absolute Error (MAE) were, respectively, evaluated at 0.025; 0.016 (RMSE; MAE) and 0.018; 0.015. At the site of Cotonou, the atmosphere is generally unstable from 09:00 to 18:00 MST and stable for the remainder of the time. The annual mean value of the wind shear coefficient is estimated at 0.20 and that of the ground surface roughness length and friction velocity are, respectively, of 0.007 m, 0.38 m·s−1. A comparative study between the wind extrapolation models and the data was carried out in order to test their reliability on our study site. The result of this is that whatever the time of the year is, only the models proposed (best fitting equation) are always in good agreement with the data unlike the other models evaluated. Finally, from the models suitable for our site, the profile of wind convective diurnal cycle was obtained by extrapolation of the wind data measured at 10 m from the ground. The average wind speed during this cycle is therefore evaluated to 8.07 m·s−1 for August which is the windiest month and to 4.98 m·s−1 for the least windy month (November) at 60 m of the ground. Considering these results, we can so consider that the site of Cotonou coastal could be suitable for the installation of wind turbines.http://dx.doi.org/10.1155/2019/7530828 |
| spellingShingle | Hagninou E. V. Donnou Aristide B. Akpo Clément A. Kouchadé Basile B. Kounouhewa Guy H. Hounguè Gbènoukpo F. Nonfodji Julien Djossou Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere Advances in Meteorology |
| title | Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere |
| title_full | Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere |
| title_fullStr | Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere |
| title_full_unstemmed | Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere |
| title_short | Vertical Profile of Wind Diurnal Cycle in the Surface Boundary Layer over the Coast of Cotonou, Benin, under a Convective Atmosphere |
| title_sort | vertical profile of wind diurnal cycle in the surface boundary layer over the coast of cotonou benin under a convective atmosphere |
| url | http://dx.doi.org/10.1155/2019/7530828 |
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