Hourly and daily clearness index and diffuse fraction at a tropical station, Ile-Ife, Nigeria

International Journal of Climatology

Volumn 29, Issue 8, 2009, Pages 1035-1047

  Okogbue, E C ^a   Adedokun, J A ^b   Holmgren, B ^c  

^a FEDERAL UNIVERSITY OF TECHNOLOGY   (Nigeria)

^b OBAFEMI AWOLOWO UNIVERSITY   (Nigeria)

^c UPPSALA UNIVERSITY   (Sweden)

Author keywords

Clearness index; Diffuse fraction; Ile Ife; Tropical station sky conditions

Indexed keywords

CLEAR SKY; CLEARNESS INDEX; CLEARNESS INDICES; CLOUDY SKIES; CUMULATIVE FREQUENCY DISTRIBUTION; DATA SETS; DIFFUSE FRACTION; DRY SEASONS; HOURLY CLEARNESS INDEX; HOURLY DIFFUSE FRACTION; ILE-IFE; NIGERIA; OVERCAST SKIES; SEASONAL VARIATION; SKY CONDITION; STATISTICAL ANALYSIS; TROPICAL STATION SKY CONDITIONS; TROPICAL STATIONS; WET SEASON;

DROUGHT; ENERGY UTILIZATION; SOLAR ENERGY; SOLAR RADIATION; SUN;

TROPICS;

CLEAR SKY; DIURNAL VARIATION; SEASONAL VARIATION; SOLAR RADIATION; STATISTICAL ANALYSIS;

AFRICA; IFE; NIGERIA; OSUN; SUB-SAHARAN AFRICA; WEST AFRICA;

EID: 67649992438     PISSN: 08998418     EISSN: 10970088     Source Type: Journal    
DOI: 10.1002/joc.1849     Document Type: Review

References (56)

1. Adebayo SI. 1989. Pronounced haze spell over Nigeria, 2nd-11th March 1977. In Proceedings of the Pre-WAMEX Symposium on the West African Monsoon, Adefolalu DO (ed.). Leo Express Printers: Lagos; 270-300.
2. Adedokun JA. 1978. West African Precipitation and dominant atmospheric mechanisms. Archives for Meteorology Geophysics and Bioclimatology A, 27: 289-310.
3. Adedokun JA, Adeyefa ZD, Okogbue E, Holmgren B. 1994. Measurement of Solar and Longwave Radiation Fluxes over Ile-Ife, Nigeria. In American Institute of Physics (AIP) Conference Proceedings, Haubold HJ, Onuora LI (eds). New York AIP Press No. 320: New York; 179-190.
4. Adedokun JA, Emofurieta WO, Adedeji OA. 1989. Physical, mineralogical and chemical properties of Harmattan dust at Ile-Ife, Nigeria. Theoretical and Applied Climatology 40: 161-169.
5. Adejokun JA. 1966. The three dimensional structure of Inter-Tropical Discontinuity Over Nigeria. Nigeria Meteorological Services Technical Note. No.39, Lagos, Nigeria, 9.
6. Adeyefa ZD, Adedokun JA. 1991. Pyheliometric Determination of Atmospheric Turbidity in Harmattan season over Ile-Ife. Renewable Energy 1(14): 555-566.
7. Adeyefa ZD, Holmgren B, Adedokun JA. 1995. Spectral solar irradiance under harmattan conditions. Renewable Energy 6(8): 989-996.
8. Adeyefa ZD, Holmgren B, Adedokun JA. 1997. Spectral solar radiation measurement and turbidity: Comparative studies within a tropical and a sub-Arctic environment. Solar Energy 60(1): 17-24.
9. Adeyewa ZD, Holmgren B, Adedokun JA. 2002. Specttroradiometric investigations of atmospheric turbidity parameters. Journal of African Meteorological Society 5(1): 15-29.
10. Ali A-L, Atsu SSD, Jervase JA. 2003. Monthly Average Daily Solar Radiation and Clearness Index Contour Maps Over Oman Energy Conversion and Management 44: 691-705.
11. Babatunde EB. 2005. Some solar radiation ratios and their interpretations with regards to radiation transfer in the atmosphere. Nigeria Journal of Pure and Applied Physics 4: 41-45.
12. Babatunde EB, Aro TA. 2000. Variation Characteristics of diffuse solar radiation at a tropical station (Ilorin, Nigeria). Nigerian Journal of Physics 12: 20-24.
13. Balogun EE. 1981. Convective Activity over Nigeria during the Monsoon season. In Proceedings of the International Conference on Early Results of FGGE and Large-scale Aspects of its Monsoon Experiment, Tallahassee, Florida, January 12-17, 8, 22-27.
14. Bamiro OA. 1983. Empirical Relations for the determination of solar radiation in Ibadan, Nigeria. Solar Energy 31(1): 85-94.
15. Biga AJ, Rosa R. 1981. Statistical behaviour of solar radiation over consecutive days. Solar Energy 27: 149-157.
16. Coppolino S. 1994. A new correlation between clearness index and relative sunshine. Renewable Energy 4(4): 417-423.
17. De Jong R, Stewart DW. 1993. Estimating global solar radiation from common meteorological observations in western Canada. Canadian Journal of Plant Science 73: 509-518.
18. De Pury DGG, Farquhar GD. 1997. Simple scaling of photosynthesis from leaves to canopies without the errors of big-leaf models. Plant Cell and Environment 20: 537-557.
19. Duffie JA, Beckman WA. 1991. Solar Engineering of Thermal Processes. John Wiley and Sons: New York.
20. El-Fandy MG. 1953. On the physics of dust atmosphere. Quarterly Journal of the Royal Meteorological Society 79: 284-287.
21. Griffiths JF (ed.). 1974. Climate of Africa. In World Survey of Climatology, Vol. 10, Landsberg HE (ed.). Elsevier Publishing Company: Amsterdam; 167-187.
22. Hansen JW. 1999. Stochastic daily solar irradiance for biological modeling applications. Agricultural Meteorology 94: 53-63.
23. Hawas M, Muneer T. 1984. Study of diffuse and global radiation characteristics in India. Energy Conversion and Management 24: 143.
24. Hook JE, McClendon RW. 1992. Estimation of solar radiation data missing from long-term meteorological records. Agronomy Journal 88: 739-742.
25. Ideriah FJK, Suleman SO. 1989. Sky conditions at Ibadan during 1975-1980. Solar Energy 43(6): 325-330.
26. Iqbal M. 1983. An Introduction to Solar Radiation. Academic Press: New York; 59-67.
27. Iziomon MG, Aro TO. 1998. The diffuse fraction of global solar irradiance at a tropical location. Theoretical and Applied Climatology 61: 77-84.
28. Iziomon MG, Aro TO. 1999. On the annual and monthly mean diurnal variations of diffuse solar radiation at a meteorological station in West Africa. Meteorology and Atmospheric Physics 69: 223-230.
29. Iziomon MG, Mayer H. 2001. Performance of solar radiation models - a case study. Agricultural Meteorology 110: 1-11.
30. Jegede OO. 1997a. Diurnal variations of the net radiation at a tropical station - Osu, Nigeria. Theoretical and Applied Climatology 58: 161-168.
31. Jegede OO. 1997b. Daily averages of net radiation measured at Osu, Nigeria in 1995. International Journal of Climatology 17: 1357-1367.
32. Jegede OO. 1997c. Estimating net radiation from air temperature for diffusion modelling applications in a tropical area. Boundary-Layer Meteorology 85: 161-173.
33. Jegede OO. 2003. A note on net radiation at Osu, Nigeria. Meteorologische Zeitschrift 12: 269-271.
34. Kalu AE. 1978. The African dust plume: Its characteristics and propagation across West Africa in winter. In Saharan Dust - Mobilisation, Transport, Deposition, Morales C (ed.). SCOPE 14 Publication, John Willey and Sons: New York; 95-118.
35. Kondratyev KY. 1969. Radiation in the Atmosphere. Academic Press: New York; 277-280.
36. Kuye A, Jagtap SS. 1992. Analysis of solar radiation data for Port Harcourt, Nigeria. Solar Energy 49(2): 139-145.
37. Kyle TG. 1991. Atmospheric Transmission, Emission and Scattering. Pergamon Press Ltd: Oxford; 288p.
38. Li DHW, Lam JC. 2001. An analysis of climatic parameters and sky condition classification. Building and Environment 36: 435-445.
39. Li DHW, Lau CCS, Lam JC. 2004. Overcast sky conditions and luminance distribution in Hong Kong. Building and Environment 39: 101-108.
40. Liu BYH, Jordan RC. 1960. The interrelationship and characteristic distribution of direct, diffuse and total solar radiation. Solar Energy 4: 1-19.
41. Liu DL, Scott BJ. 2001. Estimation of solar radiation in Australia from rainfall and temperature observations. Agricultural Meteorology 106: 41-59.
42. Maduekwe AAL, Chendo MAC. 1995. Predicting the components of the total hemispherical solar radiation from sunshine duration measurements in Lagos, Nigeria. Renewable Energy 6(7): 807-812.
43. Mauder M, Jegede OO, Okogbue EC, Wimmer F, Foken T. 2007. Surface nergy balance measurements at a tropical site in West Africa during the transition from dry to wet season. Theoretical and Applied Climatology DOI 10.1007/s00704-006-0252-6.
44. Muneer T. 1995. Solar irradiance and illuminance models for Japan II: luminous efficacies. Lighting Research and Technology 27: 223-230.
45. Muneer T. 1998. Evaluation of the CIE overcast sky model against Japanese data. Energy and Buildings: Elsevier, Netherlands; 27: 175-177.
46. Okogbue EC. 2007. Broad-band solar irradiance and photometric illuminance at the tropical station. Ile-Ife, Nigeria. Unpublished PhD Thesis, Obafemi Awolowo University, Ile-Ife, Nigeria, 223.
47. Okogbue EC, Adedokun JA. 2002a. On the estimation of solar radiation at Ondo, Nigeria. Nigerian Journal of Physics 14(1): 97-104.
48. Okogbue EC, Adedokun JA. 2002b. Characterization of sky conditions over Ile-Ife, Nigeria based on 1992-1998 Solar Radiation Observations. Meteorogische Zeitschrift, Germany 11(6): 419-423.
49. Okogbue EC, Adedokun JA, Jegede OO. 2002. Fourier series analysis of daily global and diffuse Irradiation for Ile-Ife, Nigeria. Journal of Applied Sciences 5(3): 3034-3045.
50. Okogbue EC, Adedokun JA. 2003. Improving the estimation of global solar radiation over Ondo in South Western Nigeria. Nigerian Journal of Physics 15(1): 20-31.
51. Reindl DT, Beckman WA, Duffie JA. 1990. Diffuse fraction correlations. Solar Energy 45: 1-7.
52. Saunier GY, Reddy TA, Kumar S. 1987. On the monthly probability distribution function of daily global irradiation values appropriate for both tropical and temperate locations. Solar Energy 38: 169-177.
53. Stokes GM, Schwartz SE. 1994. The Atmospheric Radiation Measurement (ARM) Program: Programmatic background design of the cloud and radiation test bed. Bulletin of the American Meteorological Society 75: 1201-1221.
54. Thornton PE, Running SW. 1999. An improved algorithm for estimating incident daily solar radiation from measurements of temperature, humidity, and precipitation. Agricultural Meteorology 93: 211-228.
55. Udoh SO. 2000. Sky conditions at Ilorin as characterized by clearness index and relative sunshine. Solar Energy 69: 45-53.
56. Wilks DS, Wilby RL. 1999. The weather generation game: a review of stochastic weather models. Progress in Physical Geography 23: 329-357.