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Spatio-Temporal Patterns of Rainfall Variability for Wet Season over Togo in West Africa

DOI: 10.4236/oalib.1106044, PP. 1-11

Subject Areas: Atmospheric Sciences

Keywords: REOF, Mann-Kendal Test, Rainfall Variability, Togo

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Abstract

Climate change is affecting rainfall variability. This paper investigated the June-September (JJAS) rainfall variability using reanalyzed and observed da-tasets from 1976 to 2015 in Togo. The rotated empirical orthogonal function (REOF) method was used to get the distribution patterns of JJAS rainfall. The Mann-Kendall (MK) statistic was also used to detect temporal trend of the ro-tated principal component time series (RPCs) that represent the modes of posi-tive loadings. The REOF method has revealed four significant patterns that ex-plained 65.1% of the total variance; the first, the second and the fourth REOF modes exhibit mainly positive loadings, whereas the third exhibits negative loadings. The first mode (REOF1) represents mainly the southern part of Togo; the second mode (REOF2) represents the northern part, the third mode (REOF3) represents the western part and the fourth (REOF4) represents the north-eastern part of Togo. The Mann-Kendall test has revealed an increasing and significant trend of rainfall in the northern region of Togo. In contrast, the trends were not significant in the southern and north-eastern parts of the coun-try. These results form a basis on which adaptation strategies may be taken in this region with high rainfall variability.

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Nimon, P. , Issaou, L. , Konko, Y. and Kokou, K. (2020). Spatio-Temporal Patterns of Rainfall Variability for Wet Season over Togo in West Africa. Open Access Library Journal, 7, e6044. doi: http://dx.doi.org/10.4236/oalib.1106044.

References

[1]  Laban, O. (2009) Climate Variability and Change in Africa?: A Review of Potential Impacts on Terrestrial Water Resources. Groundwater and Climate in Africa. Proceedings of the Kampala Conference, 47-51.
https://profiles.uonbi.ac.ke/logallo/files/ogallo_kampala.pdf
[2]  Konko, Y., Bagaram, B., Julien, F., Akpamou, K.G. and Kokou, K. (2018) Multitemporal Analysis of Coastal Erosion Based on Multisource Satellite Images in the South of the Mono Transboundary Biosphere Reserve in Togo (West Africa). Open Access Library Journal, 5, e4526. https://doi.org/10.4236/oalib.1104526
[3]  Konko, Y., Rudant, J.P., Akpamou, G.K., Noumonvi, K.D. and Kokou, K. (2018) Spa-tio-Temporal Distribution of Southeastern Community Forests in Togo (West Africa). Journal of Geoscience and Environment Pro-tection, 6, 51-65.
https://doi.org/10.4236/gep.2018.67004
[4]  Laban, O. (1979) Rainfall Variability in Africa. American Me-teorological Society.
https://journals.ametsoc.org/doi/pdf/10.1175/15200493%281979%29107%3C1133%3ARVIA%3E2.0.CO%3B2
[5]  Nichol-son, S. (2000) Land Surface Processes and Sahel Climate. Reviews of Geophysics, 38, 117-139. https://doi.org/10.1029/1999RG900014
[6]  Xu, S., Qin, M., Ding, S., Zhao, Q. and Liu, H. (2019) The Impacts of Climate Change and Land Use on the Streamflow in the Yihe River, China. Water-Open Access Journal, 11, 1-18. https://doi.org/10.3390/w11050887
[7]  Koumare, I. (2014) Temporal/Spatial Distribution of Rainfall and the Associated Circulation Anomalies over West Africa. Pakistan Journal of Meteorology, 10, 1-11.
http://www.pmd.gov.pk/rnd/rndweb/rnd_new/journal/vol10_issue20_files/1.pdf
[8]  Nicholson, S.E. (2013) The West African Sahel: A Review of Recent Studies on the Rainfall Regime and Its Interannual Variability. ISRN Meteorology, 2013, Article ID: 453521. https://doi.org/10.1155/2013/453521
[9]  Sanogo, S., Fink, A.H., Omotosho, J.A., Ba, A., Redl, R. and Ermert, V. (2015) Spatio-Temporal Characteristics of the Recent Rainfall Recovery in West Africa. International Journal of Climatology, 35, 4589-4605. https://doi.org/10.1002/joc.4309
[10]  Long, M., Entekhabi, D. and Nicholson, S.E. (2000) Interannual Variability in Rainfall, Water Vapor Flux, and Vertical Motion over West Africa. Journal of Climate, 13, 3827-3841.
https://doi.org/10.1175/1520-0442(2000)013<3827:IVIRWV>2.0.CO;2
[11]  Manzanas, R., Amekudzi, L.K., Preko, K., Herrera, S. and Gutierrez, J.M. (2014) Precipitation Variability and Trends in Ghana?: An Intercomparison of Observational and Reanalysis Products. Climatic Change, 124, 805-819.
https://doi.org/10.1007/s10584-014-1100-9
[12]  Declan, C., Aurelie, P., Sandra, A.B., Hamisai, H., Claudine, D. and Gil, M. (2009) Rainfall and Water Resources Variability in Sub-Saharan Africa during the Twentieth Century. Journal of Hydrometeorology, 10, 41-59.
https://doi.org/10.1175/2008JHM1004.1
[13]  Batebana, K., Alex Ogwang, B., Mie Mie Sein, Z., Katchele Ogou, F., Ongoma, V., and Ngarukiyimana, J.P. (2015) Investigation of the Atmospheric Circulation Anomalies Associated with Extreme Rainfall Events over the Coastal West Africa. Journal of the Earth and Space Physics, 41, 141-149.
https://doi.org/10.22059/jesphys.2015.55173
[14]  Zandler, H., Haag, I., and Samimi, C. (2019) Evaluation Needs and Temporal Performance Differences of Gridded Precipitation Products in Peripheral Mountain Regions. Scientific Reports, 9, 1-15. https://doi.org/10.1038/s41598-019-51666-z
[15]  Unal, Y.S., Deniz, A., Toros, H. and Incecik, S. (2012) Temporal and Spatial Patterns of Precipitation Variability for Annual, Wet, and Dry Seasons in Turkey. International Journal of Climatology, 32, 392-405. https://doi.org/10.1002/joc.2274
[16]  Montroy, D.L. (1997) Linear Relation of Central and Eastern North American Precipitation to Tropical Pacific Sea Surface Temperature Anomalies. Journal of Climate, 10, 541-558.
https://doi.org/10.1175/1520-0442(1997)010<0541:LROCAE>2.0.CO;2
[17]  Hannachi, A., Jolliffe, I.T. and Stephenson, D.B. (2007) Empirical Orthogonal Functions and Related Techniques in Atmospheric Science: A Review. International Journal of Cli-matology, 27, 1119-1152. https://doi.org/10.1002/joc.1499
[18]  Mann, H.B. (1945) Nonparametric. Tests against Trend. Journal of the Econometric Society, 13, 245-259. https://doi.org/10.2307/1907187
[19]  Kendall, N.H. (1975) Frontier Molecular Orbital Theory of Cycloaddition Reactions. Accounts of Chemical Research, 8, 361-369.
https://doi.org/10.1021/ar50095a001

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