ANALYSIS OF TREND AND VARIABILITY OF SUMMER SEASON VISIBILITY AND TEMPERATURE IN SAHEL ZONE OF NIGERIA

  • Mukhtar Balarabe Umaru Musa Yar`adua University, Katsina
  • Bello Saadu
Keywords: Summer season, Sahel zone, Visibility, Temperature, Trend

Abstract

The variation of climate in the past on different time scale in Nigeria has generated a lot of concern and is still posing a threat to life and properties. Meteorologist and climatologist in Nigeria are working hard to address this problem. This study assessed the recent trend and variability of summer season`s visibility and temperature for Sahel zone of Nigeria. The long-term (1988-2017) summer seasons meteorological data derived from National Oceanic Atmospheric Agency-National Climate Data Centre (NOAA-NCDC) were used. A significant decreasing trend in visibility and increasing trend in temperature were detected during the entire period of study. The overall averages were 14.71 ± 4.17 km and 24.54 ± 4.19  respectively. The trends were found more significance in the last ten years. The Decades` means are 19.38± 3.05, 13.76 ± 2.09, 10.98 ± 1.28 km  and 20.60 ± 4.72â—¦C, 25.78 ± 2.54 â—¦C and 27.25 ± 0.79  â—¦C for the first, second and third decades respectively. Standardize anomaly chart revealed that over the period of study, positive visibility anomaly correspond to negative temperature anomaly and vice visa. Their correlation at p< 0.05 significant level showed a negative relationship of 0.54 over the thirty years period. However, decade analysis showed a positive correlation of 0.47 and negative correlations of 0.61 and 0.74 for the first, second and third decades respectively. These suggest that summer season of the recent decades are dustier than the previous ones and that, summer season of the recent decades become hotter than the previous decades

References

Anuforom, A.C.,Akeh, L.E. Okeke, P.N. Opara, F.E. (2007). Inter-annual variability and long-term trend of UV-absorbing aerosols during Harmattan season in sub-Saharan West Africa. Journal of Atmospheric environment, (41) 1550–1559.

Anuforom A.C. (2007). Spatial distribution and temporal variability of Harmattan dust haze in sub-Sahel West Africa. Atmospheric Environment, ( 41) 9079-9090.

Ashley, W. (2010). Atmospheric system research (ASR) science and program plan Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research. 1-22

Balarabe M.A (2018). The Thirty Years Trend Analysis of Harmattan Season Visibility and Temperature in Sahel Zone of Nigeria. Journal of Theoretical & Applied Physics,(1)15–21

Balarabe, M.A., and Isah, M.N. (2019). A modified linear regression model for predicting Aerosol Optical Depth (AOD) in Ilorin-Nigeria. Fudma journal of science, 3 (1)140-145

Balarabe, M.,Tan, F. Abdullah, K. and NawawiM (2015a).Temporal-spatial variability of seasonal aerosol index and visibility—A case study of Nigeria. Space Science and Communication (IconSpace), 2015 International Conference IEEE, 459-464.

Balarabe, M., Abdullah, K. and Nawawi, M. (2015b). Long-Term Trend and Seasonal Variability of Horizontal Visibility in Nigerian Troposphere. Atmosphere,(6) 1462-1486.

Chineke, T., and Chiemeka,I. (2010). Harmattan Particulate Concentration and Health Impacts in Sub-Saharan Africa. The African Review of Physics, 3-12.

Goudie, A., and Middleton, N. (2001). Saharan dust storms: nature and consequences. Earth-Science Reviews, (56) 179-204.

Ikhile C.I. (2007). Impacts of Climate Variability and Change on the Hydrology and Water Resources of the Benin- Owena River Basin. Unpublished PhD Thesis, University ofBenin, Benin City, Nigeria.

Imo, J.E., and Ekpenyong N. (2011). Extreme Climatic Variability in North-western Nigeria: An Analysis of Rainfall Trends and Patterns. Journal of Geography and Geology, 3 (1) 51-62doi:10.5539/jgg.v3n1p51s

Intergovernmental Panel on Climate Change IPCC (1990). World Meteorological Organisation (WMO) United Nations Report, Nov. 1990, Geneva, Switzerland.

Intergovernmental Panel on Climate Change (1992a). Global Climate Change and Rising Challenge of Sea. Report of the Coastal Zone Management Subgroup, Supporting Document for IPCC –Update Report

Intergovernmental Panel on Climate Change (1992b). Impacts Assessment. The Supplementary Report to the IPCCprepared by IPCC Working Group II, Canberra WJ Target, Australian Government Publishing service

Junjun, D., Zhenyu, X. Bingliang, Z. Ke D. (2014). Comparative study on long termvisibility trend and its affecting factors on both sides of the Taiwan Strait. Atmos. Res. (143) 266-278doihttp://dx.doi.org/10.1016/j.atmosres

Karmalkar, A., Mcsweeney, C. New M. and Lizcano G. (2009). UNDP climate change country profile for Nigeria Retrieved from http://country-profile.geog.ox.ac.uk

Kaufman, Y.J., Tanre, D. Boucher, O.(2002). A satellite view of aerosols in the climate system.Nature, (419)2002215–223.

Mabo C.B. (2006). Temperature variation in northern Nigeria between 1970 and 2000. J Energy Environ, 19(1), 80-88.

Mahowald, N.M., Zender, C.S. Luo, C. Savoie, D. Torres O. and Del Corral J. (2002). Understanding the 30â€year Barbados desert dust record. Journal of Geophysical Research: Atmospheres,(107) AAC 7-1-AAC 7-16.

Miller, R.L., and Tegen, I. (1998). Climate response to soil dust aerosols. Journal of Climate(11)3247–3267.

Ogunjobi, K.O.,Oluleye, A. and Ajayi, A. (2012).A long-term record of aerosol index from TOMS observations and horizontal visibility in sub-Saharan West Africa. International journal of remote sensing, (33) 6076-6093.

Onyenechere E. (2010). Climate change and spatial planning concerns in Nigeria: Remedialmeasures for more effective response. Journal of Human Ecology, (32) 137-148.

Quijano, A.L.,Sokolik, I.N. Toon O.B. (2000). Influence of the aerosol vertical distribution on the retrievals of aerosol optical depth from satellite radiance measurements. Geophysical ResearchLetters,(27): doi: 10.1029/1999GL011235. issn: 0094-8276.

Usman, A.,Olaore, K.O. and Ismaila G.S. (2013). Estimating visibility using some Meteorological data at Sokoto, Nigeria. International Journal of Basic and Applied Sciences,1 (4) 810-815

Wolfgang, S., and Brigitta S. (2007). Meteorological causes of Harmattan dust in West Africa. Geomophology, (95) 412-428 doi: 10.1016/jgeomorph.2007.07.002

Published
2020-09-29
How to Cite
BalarabeM., & SaaduB. (2020). ANALYSIS OF TREND AND VARIABILITY OF SUMMER SEASON VISIBILITY AND TEMPERATURE IN SAHEL ZONE OF NIGERIA. FUDMA JOURNAL OF SCIENCES, 4(3), 489 - 495. https://doi.org/10.33003/fjs-2020-0403-416