||Fractal Analysis of the Long-Term Memory in Precipitation over Benin (West Africa)
Agbazo Médard ,
KOTO N'GOBI GABIN ,
||Advances in Meteorology
||+is study analyzed the long-term memory (LTM) in precipitation over B´enin synoptic stations from 1951 to 2010 using the
detrended fluctuation analysis (DFA) method. Results reveal the existence of positive long-term memory characteristic in rainfall
field. DFA exponent values are different regarding the concerned synoptic stations, reflecting the effect of geographical position
and climate on the LTM. +ese values were related to the type of climate. +e best DFA1-4 method depends on the geographical
position of the studied station. However, DFA2 is generally the best in terms of spatial average from DFA1 to DFA4. In B´enin
synoptic stations, except the Parakou station, the long-term temporal correlations are systematically the source of multifractality
in rainfall. Except Natitingou, the strength of long-term memory characteristic decreases each twenty years in the study period.
Considering the fractal approach, our results show that the subperiod 1991–2010 is not really a transition period as shown before.
+us, the drought is prolonging until 2010. So, fractal theory reveals more Benin climatic characteristics.
||Long term memory, Fractal Analysis, MFDFA, Benin
||1 - 12