International Journal of Technology Enhancements and Emerging Engineering Research (ISSN 2347-4289)

IJTEEE >> Volume 4 - Issue 2, February 2016 Edition

International Journal of Technology Enhancements and Emerging Engineering Research  
International Journal of Technology Enhancements and Emerging Engineering Research

Website: http://www.ijteee.org

ISSN 2347-4289

Seasonal And Monthly Estimation Of Mean Resi-dence Time Of The Harmattan Dust In Kano, Northern Nigeria Using Horizontal Visibility Data

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A. O. Essienimo, M. Momoh, D. O. Akpootu



Horizontal Visibility, Harmattan season, Mean Residence Time, kano, Aerosol dust



Kano, (12.05° N, 8.56° E) located in the extreme North of Nigeria, with an altitude of 476 m above sea level (asl.) and station number 650460 (DNKN), is one of the regions that records the least horizontal visibility of near zero in northern Nigeria during winter season due to the presence of harmattan dust particles in the air. This paper therefore, investigates the Mean Residence Time (MRT) of aerosol dust during the harmattan (winter) season using horizontal visibility data of the area. The horizontal visibility data of Kano was obtained from historical meteorological database of Tutiempo Network, for 12 harmattan seasons (2003/2004-2014/2015) with each season covering a period of the five months of harmattan season from (November–March). The results obtained, indicates that there is a downward trend in mean seasonal horizontal visibility by 0.016km per harmattan season. The seasonal average is 6.8 ± 1.5 km . The maximum and minimum seasonal average visibility are 8.9 ± 1.1 km (10-7.8 km) and 5.4 ± 2.8 km (8.2-2.6 km) respectively. Similarly, the estimated result of Mean Residence Time of dust aerosol shows a seasonal average Mean Residence Time (MRT) of 6 ± 2.4 days, with maximum and minimum seasonal average of 8.4 ± 4.7 days and 2.7 ± 1.8 days respectively. The trend reveals that the seasonal Mean Residence Time (MRT) decreases by 0.165km per harmattan season.



J. O. Akande, M. Momoh, I. G. Saidu, M. I. Ilyasu, D. O. Akpootu, M. B. Abubakar, and M. B. Abdullahi, Evaluation of Residence time of Dust Aerosol during Harmattan Season in Sokoto Area of Northern Nigeria, using visibility Data, Journal of Environmental Science, Toxicology and Food Technology., 4(4), 2013, 71-74.

F. O. Anjorin, E. U. Utah, and D. Buba, An Investigation on Effects of Harmattan Dust (aerosol) on horizontal Visibility Deteroriation over Bauchi, North-eastern Nigeria. Iranica Journal of Energy and Environment., 6(2), 2015, 92-97.

W. M. Burton, and N. G. Stewart Use of long-lived natural Radio-activity as an atmospheric tracer. Nature., 186: 1960, 584-589.

G. M. Byram, The Physical and Photochemical Basis of Visual Resolving Power. Part I. The Distribution of illumination in Retina Images. Jour. Optic. Soc. Amer., 34: 1944a, 718-738, illus.

G. M. Byram, The Physical and Photochemical Basis of Visual Resolving Power. Part II. Visual Acuity and the Photochemistry of Retina. Jour. Optic. Soc. Amer., 34: 1944b, 718-738, illus.

G. M. Byram, and G. M. Jemison, Some Principles of Visibility and Their Application to Forest Fire Detection. United States department of Agriculture, Washington, D. C. 954, 1948, 5-55.

O. A. Essienimo, M. Momoh, and D. O. Akpootu, Mass Concentration Gradient of Aerosol Across Selected States in Northern Nigeria, International Jourmal of Technology Enhancement and Emerging Engineering Research., 4(1), 2016, 17-21

W. Gisela, Dust and its impact on Earth’s climate system. Earths Institute, Columbia University. 2010

S. L. Gong, L. A. Barrie, and J. P. Blanchet, Modelling Sea-salt Aerosol in the atmosphere 1, Model Development. Journals of Geophysics Research. 102(3), 1997, 3805-3818.

S. L. Gong, L. A. Barrie, J. M. Prospero, D. L. Savoie, G. P. Ayers, J. P. Blanchet, and L. speck, Modelling Sea-salt Aerosol in the atmosphere: 2. Atmospheric concentration and Fluxes, Journals of Geophysics Research. 102(3), 1997, 3819-3830.

A. Jia, and J. Jia, Atmospheric Resident time of Fine-aerosol in the region of south Italy estimated from the activity Concentration Ratio of 〖210〗_Po/〖210〗_Pb in Air particulate, J. Anal. Bioanal. Tech. 5, 216. Dio: 10.472/2155-9872-1000216. 2014.

J. Romm, 2014 was the hottest year on record globally by far. Thinkprogress. Org. accessed on 22/1/16,http://thinkprogress.org/climate/2015/01/15/3067735/2014-hottest-year-by-far, 2015.

C. E. Junge, Residence time and Variability of tropospheric trace gases, Tellus, 26, 1974, 477-488.

L. Kristian, Direct Radiative Effect of sea-salt on Regional scale. Scientific Publishing, 2012, 11-16

P. K. Kuroda, Use of radioactive isotops as atmospheric tracer in application of Nuclear and rediachemistry., Lambrecht, R. M. and Morcos, N. (Eds.). New York, Pergamon press, 1982, 457-481.

C. Lauren, Dust in the Wind, Engeenering Magazine, Cornell University. 2016

R.H. Laurie, Memoir, Descriptive and Explanation: To accompany the new Chart of the Atlantic Ocean and Comprising Instructions, General and Particular, for the Navigation of that Sea. Fifth edition, John Purdy (Ed.) london, University of Wisconsin library. 1825,

C. Marshall, Arebian Penisula: world and its people. New York, Marshall Cavendish (1), 2006,1309

D. Matt, Global Temperature Percentile for 2014. www.earthsky.org accessed on 23/1/2016, http://earthsky.org/2014-warmest-year-on-record, 2015.

W. E. K. Middleton, Visibility in meteorology. Illus,Toronto, University Toronto press, 1941,165.

H. E. Moore, S. E. Poel, E. A. Martel, 〖222〗_Rn, 〖210〗_Pb,〖210〗_Bi,and 〖210〗_Po profile and aerosol residence time versus altitude. J. Geophys. Res., 78, 1973, 7065-7075.

M. Nick, Deserts: A Very Short Introduction. New York, Oxford University press inc. 2009, 12.

NIMET, Nigerian Climate Bulletin 2011. 7. 2011, 27-29.

NIMET, Nigerian climate bulletin 2012. 8. 2012, 20-30

B. Shaoni, 2005 was the warmest year on record: Daily news, 2006.

W. G. N. Slinn, Precipitation Scavenging, in Atmospheric Science and Power production, D. Randerson (Ed.)., Tech. Inf. Cent. Off. Sci. and techn. Inf., Dep. Of Energy Washington D. C., 1984.

R. K. Udo, Geographical regions of Nigeria. University of califonia press. Los Angeles., 1, 1970, 1-12.

WMO, (2015). 2015 likely to be the warmest on record, 2011-2015 warmest five year periods. Media center. Accessed on 23/1/16, http://www.wmo.int/media/content/wmo-2015-likely-be-warmest-recorded-2011-2015-warmest-five-year-period.