Key points are not available for this paper at this time.
Yilma Seleshi, G. R. Demaree, Rainfall Variability in the Ethiopian and Eritrean Highlands and its Links with the Southern Oscillation Index, Journal of Biogeography, Vol. 22, No. 4/5, Terrestrial Ecosystem Interactions with Global Change, Volume 2 (Jul. - Sep., 1995), pp. 945-952
Seleshi et al. (Sat,) studied this question.