Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations
Daily global and diffuse irradiance data monitored on a horizontal surface at Ile-Ife (7.5°N, 4.5°E), Nigeria, during the period 1992-1998, have been used to calculate values of the clearness index KT, and diffuse ratio K'd and the diffuse coefficient Kd for the station. A characterisation of t...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Borntraeger
2002-12-01
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| Series: | Meteorologische Zeitschrift |
| Online Access: | http://dx.doi.org/10.1127/0941-2948/2002/0011-0419 |
| _version_ | 1797320703700107264 |
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| author | Emmanuel Chilekwu Okogbue Joseph Adesola Adedokun |
| author_facet | Emmanuel Chilekwu Okogbue Joseph Adesola Adedokun |
| author_sort | Emmanuel Chilekwu Okogbue |
| collection | DOAJ |
| description | Daily global and diffuse irradiance data monitored on a horizontal surface at Ile-Ife (7.5°N, 4.5°E), Nigeria, during the period 1992-1998, have been used to calculate values of the clearness index KT, and diffuse ratio K'd and the diffuse coefficient Kd for the station. A characterisation of the sky conditions over the station, based on the calculated KT values for the 7 years of data is presented. The annual sky conditions at the station have been shown to exhibit five characteristic patterns comprising of one distinct dry season and four distinct wet (rainy) seasons. Statistical monthly KT curves have also been established for Ile-Ife after LIU and JORDAN (1960). The possibility of using these monthly KT curves to establish approximate statistical distribution of the daily global radiation for other cities within similar latitude and longitude underscores their importance. |
| first_indexed | 2024-03-08T04:46:48Z |
| format | Article |
| id | doaj.art-6daa62a4cdc6422fa2d3c02838b0444c |
| institution | Directory Open Access Journal |
| issn | 0941-2948 |
| language | English |
| last_indexed | 2024-03-08T04:46:48Z |
| publishDate | 2002-12-01 |
| publisher | Borntraeger |
| record_format | Article |
| series | Meteorologische Zeitschrift |
| spelling | doaj.art-6daa62a4cdc6422fa2d3c02838b0444c2024-02-08T08:39:56ZengBorntraegerMeteorologische Zeitschrift0941-29482002-12-0111641942310.1127/0941-2948/2002/0011-041950704Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observationsEmmanuel Chilekwu OkogbueJoseph Adesola AdedokunDaily global and diffuse irradiance data monitored on a horizontal surface at Ile-Ife (7.5°N, 4.5°E), Nigeria, during the period 1992-1998, have been used to calculate values of the clearness index KT, and diffuse ratio K'd and the diffuse coefficient Kd for the station. A characterisation of the sky conditions over the station, based on the calculated KT values for the 7 years of data is presented. The annual sky conditions at the station have been shown to exhibit five characteristic patterns comprising of one distinct dry season and four distinct wet (rainy) seasons. Statistical monthly KT curves have also been established for Ile-Ife after LIU and JORDAN (1960). The possibility of using these monthly KT curves to establish approximate statistical distribution of the daily global radiation for other cities within similar latitude and longitude underscores their importance.http://dx.doi.org/10.1127/0941-2948/2002/0011-0419 |
| spellingShingle | Emmanuel Chilekwu Okogbue Joseph Adesola Adedokun Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations Meteorologische Zeitschrift |
| title | Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations |
| title_full | Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations |
| title_fullStr | Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations |
| title_full_unstemmed | Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations |
| title_short | Characterization of sky conditions over Ile-Ife, Nigeria, based on 19921998 solar radiation observations |
| title_sort | characterization of sky conditions over ile ife nigeria based on 19921998 solar radiation observations |
| url | http://dx.doi.org/10.1127/0941-2948/2002/0011-0419 |
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