dc.contributor.author | Ogallo, Laban J | |
dc.contributor.author | Janowiak, J E | |
dc.contributor.author | Halpert, M S | |
dc.date.accessioned | 2013-06-24T06:45:32Z | |
dc.date.available | 2013-06-24T06:45:32Z | |
dc.date.issued | 1988 | |
dc.identifier.citation | Journal of the Meteorological Society of Japan, Vol. 66, No. 6. (1988), pp. 807-822 | en |
dc.identifier.uri | https://www.jstage.jst.go.jp/article/jmsj1965/66/6/66_6_807/_article | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/38680 | |
dc.description | Full Text | en |
dc.description.abstract | In this study, global sea surface temperature anomalies within ±300 latitudes of the equator were
correlated with the time series of the major rotated principal component analysis (RPCA) modes of
the seasonal rainfall over 'East Africa (Kenya, Uganda and Tanzania) for the period 1950-79.
Regionally averaged rainfall anomalies were also correlated with the SST anomalies. The physical
reality and climatological stability of the computed correlations were investigated using 6° by 6°
gridmesh SST records instead of the original 2° by 2° values. The stability of the patterns were further
tested' by random removal of a maximum of upto five pairs of the SST and rainfall records from the
original data sets. The results from the study indicate significant instantaneous (zero lag) and time
lagged correlations between SST anomalies over portions of the global oceans and some of the
principal seasonal rainfall modes in East Africa. The maximum instantaneous correlations occur in the
boreal autumn between SST anomalies in the Pacific Ocean and the autumn rainfall RPCA mode,
which is dominant over the coastal regions. The spatial patterns of the significant correlations indicate
a 'see-saw' pattern between the eastern Pacific Ocean and the Indonesia region which coincides with
positive rainfall anomalies over the coastal regions of East Africa, and indicates a relationship between
rainfall variability in this region and the El Nino/Southern Oscillation (EN SO) phenomena. Lower
spatial and temporal persistence is observed between SST anomalies and the rainfall RPCA modes that
dominate inland. The maximum variance of the seasonal rainfall that could be accounted for by the
SST anomalies was about 40%. | en |
dc.language.iso | en | en |
dc.subject | Global sea surface temperature anomalies | en |
dc.subject | Seasonal rainfall | en |
dc.subject | East Africa | en |
dc.title | Teleconnection between Seasonal Rainfall over East Africa and Global Sea Surface Temperature Anomalies | en |
dc.type | Article | en |
local.publisher | Department of Meteorology, University of Nairobi | en |