Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments
The frequent failures of ground measuring devices, e.g. radiosondes, weather stations, in developing regions is worrisome. From the literature, established projects such as the Aerosol Robotic Network (AERONET) and the African Monsoon Multidisciplinary Analyses (AMMA) are burdened by the same challe...
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ftcovenantuniv:oai:generic.eprints.org:12007 2023-05-15T13:06:44+02:00 Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments Emetere, Moses Akinyemi, M. L. 2017 application/pdf http://eprints.covenantuniversity.edu.ng/12007/ http://eprints.covenantuniversity.edu.ng/12007/1/met.1624.pdf http://wileyonlinelibrary.com en eng Wiley Online Library http://eprints.covenantuniversity.edu.ng/12007/1/met.1624.pdf Emetere, Moses and Akinyemi, M. L. (2017) Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments. METEOROLOGICAL APPLICATIONS. pp. 260-267. Q Science (General) QC Physics Article PeerReviewed 2017 ftcovenantuniv 2022-09-08T13:30:35Z The frequent failures of ground measuring devices, e.g. radiosondes, weather stations, in developing regions is worrisome. From the literature, established projects such as the Aerosol Robotic Network (AERONET) and the African Monsoon Multidisciplinary Analyses (AMMA) are burdened by the same challenge. At the moment, the AERONET and AMMA databases show a large volume of data loss. With only about 47% of data available to scientists, it is evident that accurate nowcasts or forecasts cannot be guaranteed. It is proposed that the challenge is not measuring device design error but systemic, i.e. the configuration of accurate calibration constants in the compact flash card of the devices. The calibration constants of most radiosonde or weather stations are not compatible with the atmospheric conditions of the West African climate. A dispersion model was developed to incorporate salient mathematical representations such as the unified number. The unified number was derived to describe the turbulence of aerosol transport in the frictional layer of the lower atmosphere. A 14 year dataset from theMulti-angle Imaging Spectro Radiometer was tested using the dispersionmodel. A yearly estimation of the atmospheric constants over Niamey using the model was obtained with about 87.5% accuracy. This further revealed that the average atmospheric constants for Niamey, Niger, are a1 =0.77975 and a2 =0.693021 and the tuning constants are n1 =0.140187 and n2 =0.759236. Also, the yearly atmospheric constants confirmed that the lower atmosphere of Niamey is very dynamic. Hence, it is recommended that radiosonde and weather station manufacturers should constantly review the atmospheric constants over a geographical location to enable about 80% data retrieval. Article in Journal/Newspaper Aerosol Robotic Network Covenant University Repository |
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Covenant University Repository |
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language |
English |
topic |
Q Science (General) QC Physics |
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Q Science (General) QC Physics Emetere, Moses Akinyemi, M. L. Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
topic_facet |
Q Science (General) QC Physics |
description |
The frequent failures of ground measuring devices, e.g. radiosondes, weather stations, in developing regions is worrisome. From the literature, established projects such as the Aerosol Robotic Network (AERONET) and the African Monsoon Multidisciplinary Analyses (AMMA) are burdened by the same challenge. At the moment, the AERONET and AMMA databases show a large volume of data loss. With only about 47% of data available to scientists, it is evident that accurate nowcasts or forecasts cannot be guaranteed. It is proposed that the challenge is not measuring device design error but systemic, i.e. the configuration of accurate calibration constants in the compact flash card of the devices. The calibration constants of most radiosonde or weather stations are not compatible with the atmospheric conditions of the West African climate. A dispersion model was developed to incorporate salient mathematical representations such as the unified number. The unified number was derived to describe the turbulence of aerosol transport in the frictional layer of the lower atmosphere. A 14 year dataset from theMulti-angle Imaging Spectro Radiometer was tested using the dispersionmodel. A yearly estimation of the atmospheric constants over Niamey using the model was obtained with about 87.5% accuracy. This further revealed that the average atmospheric constants for Niamey, Niger, are a1 =0.77975 and a2 =0.693021 and the tuning constants are n1 =0.140187 and n2 =0.759236. Also, the yearly atmospheric constants confirmed that the lower atmosphere of Niamey is very dynamic. Hence, it is recommended that radiosonde and weather station manufacturers should constantly review the atmospheric constants over a geographical location to enable about 80% data retrieval. |
format |
Article in Journal/Newspaper |
author |
Emetere, Moses Akinyemi, M. L. |
author_facet |
Emetere, Moses Akinyemi, M. L. |
author_sort |
Emetere, Moses |
title |
Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
title_short |
Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
title_full |
Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
title_fullStr |
Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
title_full_unstemmed |
Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments |
title_sort |
documentation of atmospheric constants over niamey, niger: a theoretical aid for measuring instruments |
publisher |
Wiley Online Library |
publishDate |
2017 |
url |
http://eprints.covenantuniversity.edu.ng/12007/ http://eprints.covenantuniversity.edu.ng/12007/1/met.1624.pdf http://wileyonlinelibrary.com |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
http://eprints.covenantuniversity.edu.ng/12007/1/met.1624.pdf Emetere, Moses and Akinyemi, M. L. (2017) Documentation of atmospheric constants over Niamey, Niger: a theoretical aid for measuring instruments. METEOROLOGICAL APPLICATIONS. pp. 260-267. |
_version_ |
1766018339733241856 |