[Figure 3]
However, correlation values between GPCC and CRU fluctuated between 0.40
and 0.80 in the low elevation areas of the Cuvette central (cf. Fig. 1b)
during the period (Fig. 2a). The considerable change in correlation
values around the Cuvette central during the different climatological
periods can be attributed to dynamics in the availability of gauged
stations. Further, the analysis of variance also confirms there is no
significant difference in the mean of these products in all
climatological periods (Fig. 2b). The spatio-temporal distribution of
meteorological stations is expected to vary, especially in regions with
poor investment in meteorological stations. GPCC is still nonetheless,
the largest gauge-observation data available globally and has been found
suitable in the characterization of agricultural and hydrological
drought in the African sub-regions, including the Congo basin (see,
e.g., Ndehedehe et al., 2019, 2020; Agutu et al., 2017).