Precipitation and Temperature trend analysis by Mann Kendall test: The case of Addis Ababa methodological station, Addis Ababa, Ethiopia
DOI:
https://doi.org/10.48346/IMIST.PRSM/ajlp-gs.v4i4.24086Keywords:
climate change, Mann Kendall, Trend Analysis, Sen’s slopeAbstract
The impact of climate change on annual and monthly air precipitation and temperature has received a great deal of attention by scholars worldwide. This study focuses on detecting trends in annual precipitation and temperature for Addis Ababa methodological station located in Addis Ababa. SPSS in combination with the excel spreadsheet used for analyzing the statistics. We were also used the Mann-Kendall trend test and Sen’s slope method to detect trends and the magnitude of change. According to our analysis, the mean minimum temperature ranges between 8.45°C and 12.5°C, while, the mean maximum temperature varies between 21.1°C and 25.5°C From the analysis the monthly coefficient of variation (CV%) for both maximum and minimum temperature ranging from (5.4% in April) to (14.08% in December). According to the Mann Kendal test and Sen’s slope estimate, the annual maximum temperature shows a statistically significant increasing trend but no significant positive or negative trend was detected in annual perception as well minimum temperature.
References
A. Panda, N. Sahu, 2019. Trend analysis of seasonal rainfall and temperature pattern in Kalahandi, Bolangir and Koraput districts of Odisha, India. Journal of atmospheric science. DOI: 10.1002/asl.932.
A. Niguse: Precipitation and Temperature Trend Analysis in Mekelle city, Northern Ethiopia, the Case of Illala Meteorological Station. Journal of Earth Science & Climatic Change. DOI: 10.4172/2157-7617.1000324.
B. Getachew, 2018. Trend analysis of temperature and rainfall in south Gondar zone, Ethiopia. Journal of degraded and mining lands management. ISSN: 2339-076X (p); 2502-2458 (e), (January 2018): 1111-1125.
B. Safari, 2012. Trend Analysis of the Mean Annual Temperature in Rwanda during the Last Fifty Two Years. Journal of Environmental Protection, 3, 538-551.
Brando, Balch, Nepstad, Morton, Putz, Coe, Silvério, Macedo, Davidson, Nóbrega, Alencar, Soares-Filho, 2014. Abrupt increases in Amazonian tree mortality due to drought–fire interactions. Proc. Natl. Acad. Sci. USA 111: 6347–6352.
C. T. Almeida, J. F. Oliveira-Júnior, R. C. Delgado, P. Cubob, M. C. Ramos, 2016. Spatiotemporal rainfall and temperature trends throughout the Brazilian Legal Amazon, 1973–2013. International journal of climatology. DOI: 10.1002/joc.4831.
Celso H. L. S. Junior , Catherine T. Almeida, Jessflan R. N. Santos, Liana O. Anderson, Luiz E. O. C. Aragão, F. B. Silva, 2015. Spatiotemporal Rainfall Trends in the Brazilian Legal Amazon between the Years 1998 and 2015. Water 2018, 10, 1220.
D. Conway, C. Mould, W. Bewket, 2014. Over one century of rainfall and temperature observation in Addis Ababa, Ethiopia. International journal of climatology. Doi: 10.1002/joc.989.
G. T. Patle, A. Libang, 2014. Trend analysis of annual and seasonal rainfall to climate variability in North- East region of India. Journal of Applied and Natural Science 6 (2): 480-483.
F. Hussain, G. Nabi, M. Waseem, 2015. Rainfall trend analysis by using the Mann-Kendall test & Sen’s slope estimates: a case study of district Chakwal rain gauge, Barani area, Northern Punjab Province, Pakistan. Sci.Int. (Lahore), 27(4), 3159-3165.
Miles L, Grainger A, Phillips O, 2004. The impact of global climate change on tropical forest biodiversity in Amazonia. Glob. Ecol. Biogeogr.13: 553–565.
Parmesan C, Yohe G, 2003. A globally coherent fingerprint of climate change impacts across natural systems. Nature 421: 37–42.
R. Rustum, A. Adeloye, F. Mwale, 2017. Spatial and temporal Trend Analysis of Long Term rainfall records in data-poor catchments with missing data, a case study of Lower Shire floodplain in Malawi for the Period 1953-2010. Hydrology and Earth System Science discussion. https://doi.org/10.5194/hess-2017-601.
S. Addisu, Y. G. Selassie, G. Fissha, B. Gedif, 2015. Time series trend analysis of temperature and rainfall in Lake Tana Sub‑basin, Ethiopia. Environ Syst Res 4:25.
S. Chattopadhyay, D. R. Edwards, 2016. Long-Term Trend Analysis of Precipitation and Air Temperature for Kentucky, United States. Climate, 4, 10.
V. Gümüş1, N.G. Soydan, O. Şimşek, H.M. Algin, M.S. Aköz, K. Yenigun, 2017. Seasonal and annual trend analysis of meteorological data in Sanliurfa, Turkey. . E.W. Publications. European Water 59: 131-136.
