Abstract
Global warming impacts leading to climate change is influencing all aspects of life and the ecosystems. Paris agreement capped the increase to a target below 2 °C and further downward trajectory to 1.5 °C above pre-industrial levels. This resolution requires nations to progressively monitor recent past and current temperature trends for accurate projections and adaptations. The present study characterizes recent temporal evolution of surface air temperature over Kenya during 1971–2010. The study utilized Climatic Research Unit reanalysis datasets for monthly minimum, maximum and mean average temperatures. Linear regression is utilized in determining statistical significance of trends, while Sequential Mann–Kendall rank test is employed in evaluating abrupt changes in temperature during the study period. Spatial analysis of mean temperature during the last four decades reveals evidence of rising temperature on annual and seasonal bases. Positive trends dominate western and central parts of Kenya, whereas insignificant positive trends are observed over northern and eastern parts of the study domain. Similarly, linear trends exhibit rising temperatures at the rate of 0.09 °C/decade, with an abrupt change in annual mean being detected in 1992. Overall, significant increase at 99% confidence level is observed during March–May season, while 95% confidence level is witnessed during October–December season.
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References
Alexander LV (2016) Global observed long-term changes in temperature and precipitation extremes: a review of progress and limitations in IPCC assessments and beyond. Weather Clim Extremes 11:4–16. https://doi.org/10.1016/j.wace.2015.10.007
Alexander LV, Zhang X, Peterson TC, Caesar J, Gleason B, Klein Tank AMG, Haylock M, Collins D, Trewin B, Rahimzadeh F, Tagipour A, Kumar KR, Revadekar J, Griffiths G, Vincent L, Stephenson DB, Burn J, Aguilar E, Brunet M, Taylor M, New M, Zhai P, Rusticucci M, Vazquez-Aguirre JL (2006) Global observed changes in daily climate extremes of temperature and precipitation. J Geophys Res Atmos. https://doi.org/10.1029/2005JD006290
Almazroui M, Hasanean HM, Basset HA (2013) Detecting climate change signals in Saudi Arabia using mean annual surface air temperatures. Theor Appl Climatol 113:585–598. https://doi.org/10.1007/s00704-012-0812-x
Anyah RO, Semazzi FHM, Xie L (2006) Simulated physical mechanisms associated with climate variability over Lake Victoria in East Africa. Mon Weather Rev 134:3588–3609. https://doi.org/10.1175/MWR3266.1
Araghi A, Mousavi-Baygi M, Adamowski J (2016) Detection of trends in days with extreme temperatures in Iran from 1961 to 2010. Theor Appl Climatol 125:213–225. https://doi.org/10.1007/s00704-015-1499-6
Ayugi BO, Wang W, Chepkemoi D (2016) Analysis of spatial and temporal patterns of rainfall variations over Kenya. J Environ Earth Sci 6:69–83
Ayugi BO, Guirong T, Ongoma V, Mafuru KB (2018) Circulations associated with variations in boreal spring rainfall over Kenya. Earth Syst Environ. https://doi.org/10.1007/s41748-018-0074-6
Bajat B, Blagojević D, Kilibarda M, Luković J, Tošić I (2015) Spatial analysis of the temperature trends in Serbia during the period 1961–2010. Theor Appl Climatol 121:289–301. https://doi.org/10.1007/s00704-014-1243-7
Boiyo R, Raghavendra K (2018) Spatial variations and trends in AOD climatology over East Africa during 2002–2016: a comparative study using three satellite data sets. Int J Climatol 38:e1221–e1240. https://doi.org/10.1002/joc.5446
Byass P (2009) Climate change and population health in Africa: where are the scientists. Glob Health Action. https://doi.org/10.3402/gha.v2i0.2065
Camberlin P (2017) Temperature trends and variability in the greater horn of Africa: interactions with precipitation. Clim Dyn 48:477–498. https://doi.org/10.1007/s00382-016-3088-5
Camberlin P, Okoola RE (2003) The onset and cessation of the ‘long rains’ in eastern Africa and their interannual variability. Theor Appl Climatol 54:43–54. https://doi.org/10.1007/s00704-002-0721-5
Camberlin P, Philippon N (2002) The East African march–may rainy season: associated atmospheric dynamics and predictability over the 1968–97 period. J Clim 15:1002–1019. https://doi.org/10.1175/1520-0442(2002)015%3c1002:teammr%3e2.0.co;2
Christy JR, Norris WB, McNider RT (2009) Surface temperature variations in east Africa and possible causes. J Clim 22:3342–3356. https://doi.org/10.1175/2008JCLI2726.1
Collins JM (2011) Temperature variability over Africa. J Clim 24:3649–3666. https://doi.org/10.1175/2011JCLI3753.1
Cook KH, Vizy EK (2013) Projected changes in East African rainy seasons. J Clim 26:5931–5948. https://doi.org/10.1175/JCLI-D-12-00455.1
Daran M, Masoodian A, Nazaripour H (2015) Spatial and temporal trend analysis of temperature extremes based on Iranian climatic database (1962–2004). Arab J Geosci 8:8469–8480. https://doi.org/10.1007/s12517-015-1840-5
Donat M, Alexander LV, Yang H, Durre I, Vose R, Dunn RJH, Willett KM, Aguilar E, Brunet M, Caesar J, Hewitson B, Jack C, Klein Tank AMG, Kruger AC, Marengo J, Peterson TC, Renom M, Oria Rojas C, Rusticucci M, Salinger J, Elrayah AS, Sekele SS, Srivastava AK, Trewin B, Villarroel C, Vincent LA, Zhai P, Zhang X, Kitching S (2013) Updated analyses of temperature and precipitation extreme indices since the beginning of the twentieth century: the HadEX2 dataset. J Geophys Res 118:2098–2118. https://doi.org/10.1002/jgrd.50150
Easterling DR, Evans JL, Groisman PY, Karl TR, Kunkel KE, Ambenje P (2000) Observed variability and trends in extreme climate events: a brief review. Bull Am Meteorol Soc 81:417–425. https://doi.org/10.1175/1520-0477(2000)081%3c0417:ovatie%3e2.3.co;2
Fioravanti G, Piervitali E, Desiato F (2016) Recent changes of temperature extremes over Italy: an index-based analysis. Theor Appl Climatol 123:473–486. https://doi.org/10.1007/s00704-014-1362-1
Fischer EM, Knutti R (2014) Detection of spatially aggregated changes in temperature and precipitation extremes. Geophys Res Lett 41:547–554. https://doi.org/10.1002/2013GL058499
Frich P, Alexander LV, Della-Marta P, Gleason B, Haylock M, Tank Klein MG, Peterson T (2002) Observed coherent changes in climatic extremes during the second half of the twentieth century. Climate Res 19:193–212. https://doi.org/10.3354/cr019193
Groisman PY, Bradley RS, Sun B (2000) The relationship of cloud cover to near-surface temperature and humidity: comparison of GCM simulations with empirical data. J Clim 13:1858–1878. https://doi.org/10.1175/1520-0442(2000)013
Harris I, Jones PD, Osborn TJ, Lister DH (2014) Updated high-resolution grids of monthly climatic observations—the CRU TS3.10 dataset. Int J Climatol 34:623–642. https://doi.org/10.1002/joc.3711
Hartfield JT, Grotjahn R, Holden P, Izaurralde R, Mader T, Marshall E, Liverman D (2014) Chapter 6 agriculture. Climate Change Impacts in the United States: The Third National Climate Assessment. Global Change Research Program, Washington. https://doi.org/10.7930/J02Z13FR.On
Hastenrath S, Polzin D, Mutai C (2011) Circulation mechanisms of Kenya rainfall anomalies. J Clim 24:404–412. https://doi.org/10.1175/2010JCLI3599.1
Hulme M, Doherty R, Ngara T, New M, Lister D (2001) African climate change: 1900–2100. Clim Res 17:145–168. https://doi.org/10.3354/cr017145
IPCC (2001) In: Houghton JT et al (eds) Climate change 2001: the scientific basis. contribution of working group I to the third assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, p 881
IPCC (2007) In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis. contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, p 996
IPCC (2013) In: Stocker TF, Qin D, Plattner G-K, Tignor M, Allen SK, Boschung J, Nauels A, Xia Y, Bex V, Midgley PM (eds) Climate change 2013: The physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, p 1535
IPCC (2014) In: Pachauri RK, Meyer LA (eds) Climate change 2014: synthesis report. contribution of working groups I, II and III to the fifth assessment report of the intergovernmental panel on climate change. IPCC, Geneva, p 151
Jones P (2012) Global temperature record. J Geophys Res 117:1–2. https://doi.org/10.1029/2011JD017187
Kendall MG (1975) Rank correlation methods. Griffin, London
Kerandi NM, Laux P, Arnault J, Kunstmann H (2016) Performance of the WRF model to simulate the seasonal and interannual variability of hydrometeorological variables in East Africa: a case study for the Tana River basin in Kenya. Theor Appl Climatol 130:401–418. https://doi.org/10.1007/s00704-016-1890-y
King’uyu SM, Ogallo LA, Anyamba EK (2000) Recent trends of minimum and maximum surface temperatures over Eastern Africa. J Clim 13:2876–2886. https://doi.org/10.1175/1520
Kuhnel I (1991) Cloudiness fluctuations over Eastern Africa. Meteorol Atmos Phys 46:185–195. https://doi.org/10.1007/BF01027344
Liuzzo L, Bono E, Sammartano V, Freni G (2016) Analysis of spatial and temporal rainfall trends in Sicily during the 1921–2012 period. Theor Appl Climatol 126:113–129. https://doi.org/10.1007/s00704-015-1561-4
Lyon B (2014) Seasonal drought in the greater horn of Africa and its recent increase during the March–May long rains. J Clim 27:7953–7975. https://doi.org/10.1175/JCLI-D-13-00459.1
Maidment RI, Allan RP, Black E (2015) Recent observed and simulated changes in rainfall over Africa. Geophys Res Lett 42:8155–8164. https://doi.org/10.1002/2015GL065765
Mann HB (1945) Nonparametric tests against trend. Econometrica 13:245–259
Meehl GA, Karl T, Easterling DR, Changnon S, Pielke R Jr, Changnon D, Evans J, Groisman PY, Knutson TR, Kunkel KE, Mearns LO, Parmesan C, Pulwarty R, Root T, Sylves RT, Whetton P, Zwiers F (2000) An introduction to trends in extreme weather and climate events: observations, socioeconomic impacts, terrestrial ecological impacts, and model projections. Bull Am Meteorol Soc 81:413–416. https://doi.org/10.1175/1520-0477(2000)081%3c0413:AITTIE%3e2.3.CO;2
Mellor JE, Levy K, Zimmerman J, Elliott M, Bartram J, Carlton E, Nelson K (2016) Science of the Total Environment Planning for climate change: the need for mechanistic systems-based approaches to study climate change impacts on diarrheal diseases. Sci Total Environ 548–549:82–90. https://doi.org/10.1016/j.scitotenv.2015.12.087
Molg T, Cullen NJ, Hardy DR, Kaser MWG (2009) Quantifying climate change in the tropical midtroposphere over East Africa from glacier shrinkage on Kilimanjaro. J Climate 22:4162–4181. https://doi.org/10.1175/2009JCLI2954.1
Ngongondo C, Xu CY, Gottschalk L, Alemaw B (2011) Evaluation of spatial and temporal characteristics of rainfall in Malawi: a case of data scarce region. Theor App Climatol 106:79–93. https://doi.org/10.1007/s00704-011-0413-0
Niang I, Ruppel OC, Abdrabo MA, Essel A, Lennard C, Padgham J, Urquhart P (2014) Africa. In: Barros VR, Field CB, Dokken DJ, Mastrandrea MD, Mach KJ, Bilir TE, Chatterjee M, Ebi KL, Estrada YO, Genova RC, Girma B, Kissel ES, Levy AN, MacCracken S, Mastrandrea PR, White LL (eds) Climate Change 2014: impacts, adaptation, and vulnerability. Part b: regional aspects. Contribution of working group II to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 1199–1265
Nicholson SE (2008) The intensity, location and structure of the tropical rainbelt over west Africa as factors in interannual variability. Int J Climatol 28:1775–1785. https://doi.org/10.1002/joc.1507
Nicholson SE (2014) The predictability of rainfall over the greater horn of Africa. Part I: prediction of seasonal rainfall. J Hydrometeorol 15:1011–1027. https://doi.org/10.1175/JHM-D-13-062.1
Nicholson SE, Entekhabi D (1986) The quasi-periodic behavior of rainfall variability in Africa and its relationship to the southern oscillation. Arch Meteorol Geophys Bioclimatol Ser A 34:311–348. https://doi.org/10.1007/BF02257765
Nsubuga FW, Olwoch JM, Rautenbach H (2014) Variability properties of daily and monthly observed near-surface temperatures in Uganda: 1960–2008. Int J Climatol 34:303–314. https://doi.org/10.1002/joc.3686
Ogallo LJ (1988) Relationships between seasonal rainfall in East Africa and the southern oscillation. J Climatol 8:31–43. https://doi.org/10.1002/joc.3370080104
Ogwang BA, Chen H, Li X, Gao C (2014) The influence of topography on East African october to december climate: sensitivity experiments with RegCM4. Adv Meteorol 2014. https://doi.org/10.1155/2014/143917
Ogwang BA, Chen H, Tan G, Ongoma V, Ntwali D (2015) Diagnosis of East African climate and the circulation mechanisms associated with extreme wet and dry events: a study based on RegCM4. Arab J Geosci 8:10255–10265. https://doi.org/10.1007/s12517-015-1949-6
Ogwang BA, Chen H, Li X, Gao C (2016) Evaluation of the capability of RegCM4.0 in simulating East African climate. Theor Appl Climatol 124:303–313. https://doi.org/10.1007/s00704-015-1420-3
Okoola RE (2000) The characteristics of cold air outbreaks over the eastern highlands of Kenya. Meteorol Atmos Phys 73:177–187. https://doi.org/10.1007/s007030050072
Omondi PA, Awange JL, Forootan E, Ogallo LA, Barakiza R, Girmaw GB, Fesseha I, Kululetera V, Kilembe C, Mbati MM, Kilavi M, King’uyu SM, Omeny PA, Njogu A, Badr EM, Musa TA, Muchiri P, Bamanya D, Komutunga E (2014) Changes in temperature and precipitation extremes over the greater horn of Africa region from 1961 to 2010. Int J Climatol 34:1262–1277. https://doi.org/10.1002/joc.3763
Omumbo JA, Lyon B, Waweru SM, Connor SJ, Thomson MC (2011) Raised temperatures over the Kericho tea estates: revisiting the climate in the East African highlands malaria debate. Malar J 10:12. https://doi.org/10.1186/1475-2875-10-12
Ongoma V, Chen H (2017) Temporal and spatial variability of temperature and precipitation over East Africa from 1951 to 2010. Meteorol Atmos Phys 29:131–144. https://doi.org/10.1007/s00703-016-0462-0
Ongoma V, Muthama JN, Gitau W (2013) Evaluation of urbanization influences on urban temperature of Kenyan cities. Glob Meteorol. https://doi.org/10.4081/gm.2013.e1
Ongoma V, Chen H, Gao C, Sagero PO (2017) Variability of temperature properties over Kenya based on observed and reanalyzed datasets. Theor Appl Climatol 133:1175–1190. https://doi.org/10.1007/s00704-017-2246-y
Ongoma V, Chen H, Gao C, Nyongesa AM, Polong F (2018) Future changes in climate extreme over equatorial East Africa based on CMIP5 multimodel ensemble. Nat Hazards 90:901–920. https://doi.org/10.1007/s11069-017-3079-9
Opiyo F, Nyangito M, Wasonga OV, Omondi P (2014) Trend analysis of rainfall and temperature variability in arid environment of Turkana, Kenya. Environ Res J 8:30–43. https://doi.org/10.3923/erj.2014.30.43
Peel MC, Finlayson BL, Mcmahon TA (2007) Updated world map of the koppen-geiger climate classification. Hydrol Earth Syst Sci 11:1633–1644
Punia M, Nain S, Kumar A, Pratap B (2015) Analysis of temperature variability over north-west part of India for the period 1970–2000. Nat Hazards 75:935–952. https://doi.org/10.1007/s11069-014-1352-8
Rosenzweig C, Elliott J, Deryng D, Ruane AC, Müller C, Arneth A (2014) Assessing agricultural risks of climate change in the 21st century in a global gridded crop model intercomparison. Proc Natl Acad Sci USA 111:4–9. https://doi.org/10.1073/pnas.1222463110
Safari B (2012) Trend analysis of the mean annual temperature in Rwanda during the last fifty two years. J Environ Prot 3:538–551. https://doi.org/10.4236/jep.2012.36065
Shongwe ME, Van Oldenborgh GJ, Van den Hurk B, Van Aalst M (2011) Projected changes in mean and extreme precipitation in Africa under global warming Part II: East Africa. J Clim 24:3718–3733. https://doi.org/10.1175/2010JCLI2883.1
Smith TM, Peterson TC, Lawrimore JH, Reynolds RW (2005) New surface temperature analyses for climate monitoring. Geophys Res Lett 32:14712. https://doi.org/10.1029/2005gl023402
Sneyers R (1990) On the statistical analysis of a series of observations. World Meteorology Organization (WMO). Technical note 143, WMO-No. 415, p 192
Song X, Wang S, Hu Y, Yue M, Zhang T, Liu Y (2017) Impact of ambient temperature on morbidity and mortality: an overview of reviews. Sci Total Environ 586:241–254. https://doi.org/10.1016/j.scitotenv.2017.01.212
Thompson LG, Brechera HH, Mosley-Thompsona E, Hardyd DR, Marka BG (2009) Glacier loss on Kilimanjaro continues unabated. Proc Natl Acad Sci 106:19770–19775. https://doi.org/10.1073/pnas.0906029106
Walther G, Post E, Convey P, Menzel A, Parmesan C, Beebee TJ, Bairlein CF (2002) Ecological response to recent climate change. Nature 416:389–395
Yang W, Seager R, Cane MA, Lyon B (2014) The East African long rains in observations and models. J Clim 27:7185–7202. https://doi.org/10.1175/JCLI-D-13-00447.1
Yanming Z, Jun W, Xinhua W (2011) Study on the change trend of precipitation and temperature in kunming city based on Mann–Kendall analysis. Adv Intell Soft Comput 119:505–513. https://doi.org/10.1007/978-3-642-25538-0_71
Yin Y, Liu H, Yi X, Liu W (2015) Spatiotemporal variation and abrupt change analysis of temperature from 1960 to 2012 in the Huang-Huai-Hai Plain, China. Adv Meteorol 2015:11–15. https://doi.org/10.1155/2015/643493
Zhang Q, Xu CY, Zhang Z, Chen YD, Liu CL (2009) Spatial and temporal variability of precipitation over China, 1951–2005. Theor Appl Climatol 95:53–68. https://doi.org/10.1007/s00704-007-0375-4
Zhang X, Alexander L, Hegerl GC, Jones P, Tank AK, Peterson TC, Zwiers FW (2011) Indices for monitoring changes in extremes based on daily temperature and precipitation data. Wiley Interdiscip Rev Clim Chang 2:851–870. https://doi.org/10.1002/wcc.147
Acknowledgement
The first author expresses gratitude to Nanjing University of Information Science and Technology (NUIST) for granting scholarship to pursue a Doctorate Degree and setting up a conducive atmosphere and infrastructure that foster research. Special acknowledgment to all data centers for availing datasets used in the study. National Science and Technology Support Program of China (2015BAC03B02) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) of China supported the work described of paper. The authors are grateful to two anonymous reviewers for their inputs that greatly improved the quality of manuscript.
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Ayugi, B.O., Tan, G. Recent trends of surface air temperatures over Kenya from 1971 to 2010. Meteorol Atmos Phys 131, 1401–1413 (2019). https://doi.org/10.1007/s00703-018-0644-z
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DOI: https://doi.org/10.1007/s00703-018-0644-z