PROF. OUMA GILBERT ONG'ISA
University of Nairobi PhD. in Meteorology
Physical Address: Chiromo Campus, Riverside Drive, Nairobi, Kenya.
4449004 ext. 2070
Email: gouma@uonbi.ac.ke
Physical Address: Chiromo Campus, Riverside Drive, Nairobi, Kenya.
4449004 ext. 2070
Email: gouma@uonbi.ac.ke
The magnitude and trend of temperature and rainfall extremes as indicators of climate variability and change were investigated in the Arid and Semi-Arid Lands (ASALs) of Kenya using in-situ measurements and gridded climate proxy datasets, and analysed using the Gaussian-Kernel analysis and the Mann-Kendall statistics. The results show that the maximum and minimum temperatures have been increasing, with warmer temperatures being experienced mostly at night time. The average change in the mean maximum and minimum seasonal surface air temperature for the region were 0.74˚C and 0.60˚C, respectively between the 1961-1990 and 1991-2013 periods. Decreasing but statistically insignificant trends in the seasonal rainfall were noted in the area, but with mixed patterns in variability. The March-April-May rainfall season indicated the highest decrease in the seasonal rainfall amounts. The southern parts of the region had a decreasing trend in rainfall that was greater
than that of the northern areas. The results of this study are expected to support sustainable pastoralism system prevalent with the local communities in the ASALs.