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Atmosphere 2018, 9(2), 44; https://doi.org/10.3390/atmos9020044

ECMWF Atmospheric Profiles in Maroua, Cameroon: Analysis and Overview of the Simulation of Downward Global Solar Radiation

1
Environmental Energy Technologies Laboratory (EETL), Department of Physics, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon
2
Department of Physics, Higher Teachers’ Training College, University of Maroua, P.O. Box 55, Maroua, Cameroon
3
Univ. Lille, CNRS, UMR 8518–LOA–Laboratoire d’Optique Atmosphérique, F–59000 Lille, France
4
Department of Electrical and Electronic Engineering, Faculty of Engineering and Technology, University of Buea, P.O. Box 63, Buea, Cameroon
*
Author to whom correspondence should be addressed.
Received: 28 October 2017 / Revised: 20 January 2018 / Accepted: 25 January 2018 / Published: 31 January 2018
(This article belongs to the Section Climatology and Meteorology)
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Abstract

Atmospheric analysis data from the European Center for Medium-Range Weather Forecasts (ECMWF) have been acquired and are used to characterize the meteorological situation in Maroua, Cameroon ( 10.614 N, 14.361 E) at 12:00 UTC. These are then used to simulate downward global solar radiation (DGSR) with the moderate-resolution transmittance (MODTRAN) radiative transfer code (RTC). In comparison with meteorological data measured during the year 2014 in Maroua, ECMWF atmospheric quantities at ground level, in general, showed good correlation coefficients and slight differences. It is shown that ECMWF atmospheric profiles can thus be used to complete the scarce atmospheric data and to study the atmosphere state and dynamics, such as the African monsoon phenomenon detected in this region, which regulates the rainy season. In addition, they are more suitable to simulate clear-sky DGSR compared to MODTRAN standard atmospheric profiles. The causes and effects of the substantial bias and weak correlation coefficient observed with ECMWF wind data and the constant underestimation of simulated DGSR in comparison with ground-based measurements are investigated. The paper emphasizes the need for a better characterization of the Maroua atmosphere state and dynamics as well as the simulation of more accurate and reliable DGSR under any atmospheric conditions. View Full-Text
Keywords: ECMWF atmospheric profiles; meteorological data; African monsoon; solar radiation; MODTRAN ECMWF atmospheric profiles; meteorological data; African monsoon; solar radiation; MODTRAN
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fotsing Talla, C.; Njomo, D.; Cornet, C.; Dubuisson, P.; Akana Nguimdo, L. ECMWF Atmospheric Profiles in Maroua, Cameroon: Analysis and Overview of the Simulation of Downward Global Solar Radiation. Atmosphere 2018, 9, 44.

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