This study investigates the trends and variations in rainfall, temperature, and relative humidity over a 33-year period (1990-2023) in the Tamale metropolis, using data from the five (5) data stations of Ghana Meteorological Agency (GMeT). Statistical trend analyses were performed using the Mann-Kendall test, followed by the Theil Sen slope test, to assess the direction and magnitude of changes in annual, monthly, and seasonal patterns. Between May and August (raining season), increasing temperatures are observed in May and July. Minimum temperatures are observed for every month of the year. However, there were increasing rainfalls in March but decreasing in August and September. Relative humidity exhibited decreasing trends in all months except March. To overcome the consequences of these, there is need to develop heat-tolerant crop varieties, adjust planting dates and schedules, promote agroforestry practices and enhance pest and disease management techniques.
References
[1]
Kushwaha, N., Bhardwaj, A. and Verma, V. (2016) Hydrologic Response of Takarla-Ballowal Watershed in Shivalik Foot-Hills Based on Morphometric Analysis Using Remote Sensing and GIS. Journal of Indian Water Resources Society, 36, 17-25.
[2]
Kushwaha, N.L., Rajput, J., Shirsath, P.B., Sena, D.R. and Mani, I. (2022) Seasonal Climate Forecasts (SCFs) Based Risk Management Strategies: A Case Study of Rainfed Rice Cultivation in India. Journal of Agrometeorology, 24, 10-17. https://doi.org/10.54386/jam.v24i1.775
[3]
Pingale, S.M., Khare, D., Jat, M.K. and Adamowski, J. (2014) Spatial and Temporal Trends of Mean and Extreme Rainfall and Temperature for the 33 Urban Centers of the Arid and Semi-Arid State of Rajasthan, India. Atmospheric Research, 138, 73-90. https://doi.org/10.1016/j.atmosres.2013.10.024
[4]
New, M., Todd, M., Hulme, M. and Jones, P. (2001) Precipitation Measurements and Trends in the Twentieth Century. International Journal of Climatology, 21, 1889-1922. https://doi.org/10.1002/joc.680
[5]
Jones, P.D., New, M., Parker, D.E., Martin, S. and Rigor, I.G. (1999) Surface Air Temperature and Its Changes over the Past 150 Years. Reviews of Geophysics, 37, 173-199. https://doi.org/10.1029/1999rg900002
[6]
Amekudzi, L.K., Atiah, W.A., Quansah, E. and Preko, K. (2019) The Spatio-Temporal Variability of Rainfall over the Agro-Ecological Zones of Ghana. Atmospheric and Climate Sciences, 9, 527-544.
[7]
De Pinto, A., Demirag, U., Haruna, A.K.J. and Asamoah, M. (2012) Climate Change, Agriculture, and Foodcrop Production in Ghana (Policy Note 3). International Food Policy Research Institute. http://www.ifpri.org/publication/climate-changeagriculture-and-foodcrop-production-ghana
[8]
MESTI (2015) Ghana’s Third National Communication to the UNFCCC. UNFCCC. http://unfccc.int/resource/docs/natc/ghanc3.pdf
[9]
Stanturf, J., Warren, M., Charnley, S., Polasky, S.C., Goodrick, S.L., Armah, F. and Nyako, Y.A. (2011) Ghana Climate Change Vulnerability and Adaptation Assessment. United States Agency for International Development.
[10]
MESTI (2012) Ghana’s Second National Communication to the UNFCCC. UNFCCC. http://unfccc.int/resource/docs/natc/ghanc2.pdf
[11]
Minia, Z. and Agyemang-Bonsu, W. (2008) Climate Change Scenario Development. Ghana Climate Change Impacts, Vulnerability and Adaptation Assessments. Environmental Protection Agency.
[12]
Bank, W. (2010) Economics of Adaptation to Climate Change. Ghana Country Study. World Bank.
[13]
McSweeney, C., New, M., Lizcano, G. and Lu, X. (2010) The UNDP Climate Change Country Profiles. Bulletin of the American Meteorological Society, 91, 157-166. https://doi.org/10.1175/2009bams2826.1
[14]
Asante, F. and Amuakwa-Mensah, F. (2014) Climate Change and Variability in Ghana: Stocktaking. Climate, 3, 78-99. https://doi.org/10.3390/cli3010078
[15]
UNDPI (2015) Ghana’s Third National Communication Report to the UNFCCC. Environmental Protection Agency (EPA), Ministry of Environment, Science, Technology and Innovation (MESTI).
[16]
Antwi-Agyei, P., Fraser, E.D.G., Dougill, A.J., Stringer, L.C. and Simelton, E. (2012) Mapping the Vulnerability of Crop Production to Drought in Ghana Using Rainfall, Yield and Socioeconomic Data. Applied Geography, 32, 324-334. https://doi.org/10.1016/j.apgeog.2011.06.010
[17]
Saito, O., Kranjac-Berisavljevic, G., Takeuchi, K. and Gyasi, E.A. (2017) Strategies for Building Resilience against Climate and Ecosystem Changes in Sub-Saharan Africa. Springer.
[18]
Yiran, G.A.B. and Stringer, L.C. (2016) Spatio-Temporal Analyses of Impacts of Multiple Climatic Hazards in a Savannah Ecosystem of Ghana. Climate Risk Management, 14, 11-26. https://doi.org/10.1016/j.crm.2016.09.003
[19]
Martey, F. and Anane-Fenin, K. (2021) Trends and Periodicities in Rainfall, Temperature, and Relative Humidity Datasets over Ghana. Earth & Environmental Science Research & Reviews, 4, 44-54.
[20]
Emmanuel, A. (2014) Rising Temperature and Declining Rainfall—A Threat to Water Security in Northern Region of Ghana. British Journal of Applied Science & Technology, 4, 4721-4730. https://doi.org/10.9734/bjast/2014/13031
[21]
Klutse, N.A.B., Owusu, K. and Boafo, Y.A. (2020) Projected Temperature Increases over Northern Ghana. SN Applied Sciences, 2, 1-14. https://doi.org/10.1007/s42452-020-3095-3
[22]
Ghana Statistical Service (2021) 2021 Population and Housing Census General Report. Accra, Ghana Statistical Service.
[23]
Pettitt, A.N. (1979) A Non-Parametric Approach to the Change-Point Problem. Applied Statistics, 28, 126-135. https://doi.org/10.2307/2346729
[24]
Rajput, J., Kushwaha, N., Sena, D., Singh, D. and Mani, I. (2023) Trend Assessment of Rainfall, Temperature and Relative Humidity Using Non-Parametric Tests in the National Capital Region, Delhi. Mausam, 74, 593-606. https://doi.org/10.54302/mausam.v74i3.4936
[25]
Owusu, K. and Waylen, P. (2009) Trends in Spatio-Temporal Variability in Annual Rainfall in Ghana (1951-2000). Weather, 64, 115-120. https://doi.org/10.1002/wea.255
[26]
Nkrumah, F., Klutse, N.A.B., Adukpo, D.C., Owusu, K., Quagraine, K.A., Owusu, A., et al. (2014) Rainfall Variability over Ghana: Model versus Rain Gauge Observation. International Journal of Geosciences, 5, 673-683. https://doi.org/10.4236/ijg.2014.57060
[27]
Gebrechorkos, S.H., Hülsmann, S. and Bernhofer, C. (2018) Changes in Temperature and Precipitation Extremes in Ethiopia, Kenya, and Tanzania. International Journal of Climatology, 39, 18-30. https://doi.org/10.1002/joc.5777
[28]
Boko, M., Niang, I., Nyong, A., et al. (2007) Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the IPCC.
[29]
Armah, F.A., Odoi, J.O., Yengoh, G.T., et al. (2011) Food Security and Climate Change in Drought-Sensitive Savanna Zones of Ghana. Mitigation and Adaptation Strategies for Global Change, 16, 291-306. https://doi.org/10.1007/s11027-010-9263-9
[30]
Klutse, N.A.B., Adukpo, D.C., Owusu, K. and Nkrumah, F. (2018) Assessment of Trends and Variability of Temperature in Ghana over the 20th Century. Weather and Climate Extremes, 19, 27-35.
[31]
Nyatuame, M., Kasei, R.A. and Martey, E. (2014) Trend Analysis of Temperature and Rainfall in Selected Communities of Vea Catchment of Upper East Region of Ghana. Environment and Pollution, 3, Article 52.
[32]
Adiku, S.G.K., MacCarthy, D.S., Kumaga, F.K. and Osei, R.D. (2015) Climate Change and Cereal Crop Production in Ghana: Implications for Food Security. Ghana Policy Journal, 9, 39-57.
[33]
Kasei, R.A., Afuakwa, J.J. and Abdul-Razak, M. (2010) Rainfall Variability and Its Impact on Maize Yield in Ghana. Proceedings of the Environmental Management Conference, Abeokuta, 3-7 October 2010, 1-11.
[34]
Laube, W., Schraven, B. and Awo, M. (2011) Smallholder Adaptation to Climate Change: Dynamics and Limits in Northern Ghana. Climatic Change, 111, 753-774. https://doi.org/10.1007/s10584-011-0199-1
[35]
Apata, T.G., Samuel, K.D. and Adeola, A.O. (2016) Analysis of Climate Change Perception and Adaptation among Arable Food Crop Farmers in South Western Nigeria. International Journal of Climate Change Strategies and Management, 8, 403-418.
[36]
Kasei, R., Diekkrüger, B. and Leemhuis, C. (2009) Drought Frequency in the Volta Basin of West Africa. Sustainability Science, 5, 89-97. https://doi.org/10.1007/s11625-009-0101-5
[37]
Nyadzi, F., Ofori, B.D. and Ampadu, B. (2015) Trend Analysis of Rainfall and Temperature in the Upper West Region of Ghana. Weather and Climate Extremes, 8, 26-34.
[38]
Dietz, T., Millar, D., Dittoh, S., Obeng, F. and Ofori-Sarpong, E. (2004) Climate Change and Rural Livelihoods in Northern Ghana: A Risk Scenarios Approach. In: Dietz, A.J., Ruben, R. and Verhagen, A., Eds., The Impact of Climate Change on Drylands, with a Focus on West Africa, Springer, 149-172.
[39]
Gbetibouo, G.A. and Hassan, R.M. (2005) Measuring the Economic Impact of Climate Change on Major South African Field Crops: A Ricardian Approach. Global and Planetary Change, 47, 143-152. https://doi.org/10.1016/j.gloplacha.2004.10.009
[40]
Adjei, K.A., Boamah, D. and Nketia, S. (2020) Assessing the Effects of Rainfall Variability on Water Resources in Northern Ghana. Ghana Journal of Geography, 12, 72-88.
[41]
Ntiamoa-Baidu, Y. (2008) Biodiversity Conservation and Sustainable Development in Ghana: The Case of the Wechiau Community Hippo Sanctuary. In: Roe, A.R., Ed., Conservation and Sustainable Development in Ghana, Ghana Wildlife Society, 43-58.
[42]
Tschakert, P., Sagoe, R., Ofori-Darko, G. and Codjoe, S.N. (2010) Floods in the Sahel: An Analysis of Anomalies, Memory, and Anticipatory Learning. Climatic Change, 103, 471-502. https://doi.org/10.1007/s10584-009-9776-y
[43]
Ampadu, B., Codjoe, S.N.A. and Owusu, G. (2021) Community-Based Adaptation to Climate Variability and Change in Ghana: Practices and Lessons. Climate and Development, 13, 41-53.
[44]
Mertz, O., Mbow, C., Reenberg, A. and Diouf, A. (2008) Farmers’ Perceptions of Climate Change and Agricultural Adaptation Strategies in Rural Sahel. Environmental Management, 43, 804-816. https://doi.org/10.1007/s00267-008-9197-0
[45]
Nkrumah, F., Quagraine, K., Kabo-Bah, A.T. and Codjoe, S.N.A. (2020) Assessing the Observed Variability and Trends in Rainfall and Temperature in Northern Ghana. Heliyon, 6, e04026.
[46]
Anyadike, R.N.C. (2009) Climate Change and Sustainable Development in Nigeria: Conceptual and Empirical Issues. In: Ayoade, J.A. and Akintola, M.O., Eds., Climate Change and Sustainable Development in Nigeria, Nigerian Meteorological Society, 23-38.
[47]
Mensah, C., Agyeman, V.K. and Owusu, K. (2015) Climatic Trends in Southern Ghana and the Potential Implications for Forest Ecosystem Services. Climate, 3, 833–849.
[48]
Sarr, B. (2012) Present and Future Climate Change in the Semi‐arid Region of West Africa: A Crucial Input for Practical Adaptation in Agriculture. Atmospheric Science Letters, 13, 108-112. https://doi.org/10.1002/asl.368
[49]
Akinbode, O.M. (2010) Climate Change and Food Security in Nigeria: Implications for Sustainable Rural Development. Ozean Journal of Social Sciences, 3, 57-66.
[50]
Tambo, J.A., Kansiime, M.K. and Wainaina, P. (2021) Farmer Risk Preferences and Uptake of Climate-Smart Agricultural Technologies in Ghana. Climate and Development, 13, 388-398.
[51]
Waha, K., Müller, C., Bondeau, A., Dietrich, J.P., Kurukulasuriya, P., Heinke, J., et al. (2013) Adaptation to Climate Change through the Choice of Cropping System and Sowing Date in Sub-Saharan Africa. Global Environmental Change, 23, 130-143. https://doi.org/10.1016/j.gloenvcha.2012.11.001
[52]
Acheampong, E.N., Ozor, N. and Owusu, K. (2014) Vulnerability and Adaptation to Climate Change: A Review of Local Actions and National Policy Response in Ghana. African Journal of Agricultural Research, 9, 2375–2384.
[53]
Badu-Apraku, B., Oikeh, S.O. and Lum, A.F. (2010) Strategies for Drought Tolerance and Water Use Efficiency in Maize in Sub-Saharan Africa. West African Journal of Applied Ecology, 17, 1-13.
[54]
Partey, S.T., Zougmoré, R.B., Ouédraogo, M. and Campbell, B.M. (2018) Developing Climate-Smart Agriculture to Face Climate Variability in West Africa: Challenges and Lessons Learnt. Journal of Cleaner Production, 187, 285-295. https://doi.org/10.1016/j.jclepro.2018.03.199
[55]
Codjoe, S.N.A. and Owusu, G. (2011) Climate Change/Variability and Food Systems: Evidence from the Afram Plains, Ghana. Regional Environmental Change, 11, 753-765. https://doi.org/10.1007/s10113-011-0211-3
