Galle Sylvie, Grippa M., Peugeot Christophe, Moussa I. B., Cappelaere Bernard, Demarty Jérome, Mougin E., Panthou G., Adjomayi P., Agbossou E. K., Ba A., Boucher Marie, Cohard J. M., Descloitres Marc, Descroix Luc, Diawara M., Dossou M., Favreau Guillaume, Gangneron F., Gosset Marielle, Hector Basile, Hiernaux P., Issoufou B. A., Kergoat L., Lawin E., Lebel Thierry, Legchenko Anatoli, Abdou M. M., Malam Issa Oumarou, Mamadou O., Nazoumou Y., Pellarin T., Quantin Guillaume, Sambou B., Seghieri Josiane, Séguis Luc, Vandervaere J. P., Vischel T., Vouillamoz J. M., Zannou A., Afouda S., Alhassane A., Arjounin Marc, Barral Hélène, Biron Romain, Cazenave Frédéric, Chaffard V., Chazarin J. P., Guyard Hélène, Kone A., Mainassara I., Mamane A., Oi Monique, Ouani T., Soumaguel N., Wubda M., Ago E. E., Alle I. C., Allies A., Arpin-Pont F., Awessou B., Charvet G., Casse Claire, Dardel C., Depeyre A., Diallo Fatoumata Binta, Do T., Fatras C., Frappart F., Gal Laëtitia, Gascon T., Gibon F., Guiro I., Ingatan A., Kempf Jean, Kotchoni D. O. V., Lawson F. M. A., Leauthaud C., Louvet S., Mason Eloïse, Nguyen C. C., Perrimond B., Pierre C., Richard A., Robert E., Roman-Cascon C., Velluet Cecile, Wilcox C. (2018). AMMA-CATCH, a critical zone observatory in West Africa monitoring a region in transition. Vadose Zone Journal, 17 (1), 180062 [24 p.]. ISSN 1539-1663.
Titre du document
AMMA-CATCH, a critical zone observatory in West Africa monitoring a region in transition
Année de publication
2018
Auteurs
Galle Sylvie, Grippa M., Peugeot Christophe, Moussa I. B., Cappelaere Bernard, Demarty Jérome, Mougin E., Panthou G., Adjomayi P., Agbossou E. K., Ba A., Boucher Marie, Cohard J. M., Descloitres Marc, Descroix Luc, Diawara M., Dossou M., Favreau Guillaume, Gangneron F., Gosset Marielle, Hector Basile, Hiernaux P., Issoufou B. A., Kergoat L., Lawin E., Lebel Thierry, Legchenko Anatoli, Abdou M. M., Malam Issa Oumarou, Mamadou O., Nazoumou Y., Pellarin T., Quantin Guillaume, Sambou B., Seghieri Josiane, Séguis Luc, Vandervaere J. P., Vischel T., Vouillamoz J. M., Zannou A., Afouda S., Alhassane A., Arjounin Marc, Barral Hélène, Biron Romain, Cazenave Frédéric, Chaffard V., Chazarin J. P., Guyard Hélène, Kone A., Mainassara I., Mamane A., Oi Monique, Ouani T., Soumaguel N., Wubda M., Ago E. E., Alle I. C., Allies A., Arpin-Pont F., Awessou B., Charvet G., Casse Claire, Dardel C., Depeyre A., Diallo Fatoumata Binta, Do T., Fatras C., Frappart F., Gal Laëtitia, Gascon T., Gibon F., Guiro I., Ingatan A., Kempf Jean, Kotchoni D. O. V., Lawson F. M. A., Leauthaud C., Louvet S., Mason Eloïse, Nguyen C. C., Perrimond B., Pierre C., Richard A., Robert E., Roman-Cascon C., Velluet Cecile, Wilcox C.
Source
Vadose Zone Journal, 2018,
17 (1), 180062 [24 p.] ISSN 1539-1663
West Africa is a region in fast transition from climate, demography, and land use perspectives. In this context, the African Monsoon Multidisciplinary Analysis (AMMA)-Couplage de l'Atmosphere Tropicale et du Cycle eco-Hydrologique (CATCH) long-term regional observatory was developed to monitor the impacts of global change on the critical zone of West Africa and to better understand its current and future dynamics. The observatory is organized into three thematic axes, which drive the observation and instrumentation strategy: (i) analyze the long-term evolution of eco-hydrosystems from a regional perspective; (ii) better understand critical zone processes and their variability; and (iii) meet socioeconomic and development needs. To achieve these goals, the observatory has gathered data since 1990 from four densely instrumented mesoscale sites (similar to 10(4) km(2) each), located at different latitudes (Benin, Niger, Mali, and Senegal) so as to sample the sharp eco-climatic gradient that is characteristic of the region. Simultaneous monitoring of the vegetation cover and of various components of the water balance at these four sites has provided new insights into the seemingly paradoxical eco-hydrological changes observed in the Sahel during the last decades: groundwater recharge and/ or runoff intensification despite rainfall deficit and subsequent re-greening with still increasing runoff. Hydrological processes and the role of certain key landscape features are highlighted, as well as the importance of an appropriate description of soil and subsoil characteristics. Applications of these scientific results for sustainable development issues are proposed. Finally, detecting and attributing eco-hydrological changes and identifying possible regime shifts in the hydrologic cycle are the next challenges that need to be faced.
Plan de classement
Sciences du milieu [021]
;
Hydrologie [062]
;
Etudes, transformation, conservation du milieu naturel [082]
;
Télédétection [126]
Description Géographique
AFRIQUE DE L'OUEST ; BENIN ; NIGER ; MALI ; SENEGAL ; SAHEL ; ZONE SOUDANOSAHELIENNE
Localisation
Fonds IRD [F B010073807]
Identifiant IRD
fdi:010073807