Rainfall characteristics over Togo and their related atomospheric circulation anomalies: In Journal of Environmental & Agricultural Sciences, 5:34-48
This study attempts to reveal features of rainfall over Togo, in relationship to the
prevailing atmospheric circulation. The study employed correlation analysis and composite analysis in
the analysis of rainfall, sea surface temperature, wind, and humidity. Empirical orthogonal functions
(EOF) analysis was employed in this study. The years: 1989, 1991, 1995, 2003 and 2007 were
identified to be anomalously wet years while 1982, 1983, 1990, 1992, 2001 and 2006 fall in the
anomalously dry years’ category. The dominant mode of variability exhibits a dipole pattern, and
explains 36% of the total variance. The rainfall was robustly correlated to Southern Atlantic Ocean
Dipole (SAOD). The predominant wind flow over the country is westerly. Wet years were associated
with anomalous low pressure area over Togo as opposed to the dry years which exhibited an anomalous
high pressure area in the same region at low level. The results from this study provided basic climate
information on Togo’s rainfall. The SAOD can be further investigated of how it can be factored into
seasonal rainfall forecasting over Togo. Accurate and timely rainfall forecasting will help to minimize
the devastating impacts associated with anomalous rainfall in the region.
Notes: If you wish to download the full text, please contact library(at)wmo.int (Please replace (at) by @).
Format: Digital (Available online for logged-in users)