Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa)
This study analyzed the long-term memory (LTM) in precipitation over Bénin 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 regardin...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/1353195 |
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| author | Medard Noukpo Agbazo Gabin Koto N’Gobi Eric Alamou Basile Kounouhewa Abel Afouda |
| author_facet | Medard Noukpo Agbazo Gabin Koto N’Gobi Eric Alamou Basile Kounouhewa Abel Afouda |
| author_sort | Medard Noukpo Agbazo |
| collection | DOAJ |
| description | This study analyzed the long-term memory (LTM) in precipitation over Bénin 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. These values were related to the type of climate. The 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 Bénin 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. Thus, the drought is prolonging until 2010. So, fractal theory reveals more Bénin climatic characteristics. |
| format | Article |
| id | doaj-art-b0b340ef44d24c209ca9de6a6f73cbb1 |
| institution | OA Journals |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-b0b340ef44d24c209ca9de6a6f73cbb12025-08-20T02:19:16ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/13531951353195Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa)Medard Noukpo Agbazo0Gabin Koto N’Gobi1Eric Alamou2Basile Kounouhewa3Abel Afouda4International Chair in Physics Mathematics and Applications (CIPMA-Chair Unesco), University of Abomey-Calavi, Abomey-Calavi BP: 526 UAC, BeninLaboratoire de Physique du Rayonnement (LPR), University of Abomey-Calavi, Abomey-Calavi BP: 526 UAC, BeninLaboratoire d’Hydrologie Appliquée (LHA), University of Abomey-Calavi, Abomey-Calavi BP: 526 UAC, BeninLaboratoire de Physique du Rayonnement (LPR), University of Abomey-Calavi, Abomey-Calavi BP: 526 UAC, BeninLaboratoire d’Hydrologie Appliquée (LHA), University of Abomey-Calavi, Abomey-Calavi BP: 526 UAC, BeninThis study analyzed the long-term memory (LTM) in precipitation over Bénin 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. These values were related to the type of climate. The 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 Bénin 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. Thus, the drought is prolonging until 2010. So, fractal theory reveals more Bénin climatic characteristics.http://dx.doi.org/10.1155/2019/1353195 |
| spellingShingle | Medard Noukpo Agbazo Gabin Koto N’Gobi Eric Alamou Basile Kounouhewa Abel Afouda Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) Advances in Meteorology |
| title | Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) |
| title_full | Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) |
| title_fullStr | Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) |
| title_full_unstemmed | Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) |
| title_short | Fractal Analysis of the Long-Term Memory in Precipitation over Bénin (West Africa) |
| title_sort | fractal analysis of the long term memory in precipitation over benin west africa |
| url | http://dx.doi.org/10.1155/2019/1353195 |
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