AMMA-CATCH, a critical zone observatory in west Africa monitoring a region in transition

Galle S., Grippa Manuela, Peugeot C., Bouzou Moussa Ibrahim, Cappelaere Bernard, Demarty J., Mougin E., Panthou A., Adjomayi P., Ba A., Boucher M., Cohard J.M., Descloitres Marc, Descroix L., Diawara Moriké, Dossou M., Favreau Guillaume, Gangneron F., Gosset Marielle, Hector B., Hiernaux Pierre, Issoufou B.A., Kergoat Laurent, Lawin E., Lebel T., Legchenko A., Malam Abdou M., Malam-Issa Oumarou, Mamadou O., Nazoumou Y., Pellarin Thierry, Quantin G., Sambou B., Seghieri Josiane, Séguis Lus, Vandervaere J.P., Vischel T., Vouillamoz J.M., Zannou A., Afouda S., Alhassane A., Arjounin M., Barral H., Biron R., Cazenave F., Chaffard V., Chazarin J.P., Guyard H., Koné A., Mainassara I., Mamane A., Oi M., Ouani T., Soumaguel N., Wubda M., Ago E.E., Alle I.C., Allies A., Arpin-Pont F., Awessou B., Cassé C., Charvet G., Dardel C., Depeyre A., Diallo F.B., Do T., Fatras C., Frappart F., Gal L., Gascon T., Gibon François, Guiro I., Ingatan A., Kempf J., Kotchoni D.O.V., Lawson F.M.A., Leauthaud Crystèle, Louvet S., Mason E., Nguyen C.C., Perrimond B., Pierre Caroline, Richard A., Robert E., Román-Cascón Carlos, Velluet C., 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.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
Published version - Anglais
License Licence Creative Commons.

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Quartile : Q1, Sujet : WATER RESOURCES / Quartile : Q1, Sujet : SOIL SCIENCE / Quartile : Q2, Sujet : ENVIRONMENTAL SCIENCES

Abstract : 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'Atmosphère 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 (∼104 km2 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.

Mots-clés Agrovoc : Climatologie, Changement climatique, Mesure, Ressource en eau, Hydrologie, Analyse de données, Utilisation des terres, Démographie, Couverture végétale, Régime hydrique du sol

Mots-clés géographiques Agrovoc : Afrique occidentale

Classification Agris : P10 - Water resources and management
P40 - Meteorology and climatology
U30 - Research methods
P36 - Soil erosion, conservation and reclamation

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Galle S., IRD (FRA) - auteur correspondant
  • Grippa Manuela, GET (FRA)
  • Peugeot C., IRD (FRA)
  • Bouzou Moussa Ibrahim, Université Abdou Moumouni (NER)
  • Cappelaere Bernard, IRD (FRA)
  • Demarty J., IRD (FRA)
  • Mougin E., GET (FRA)
  • Panthou A., Université de Grenoble (FRA)
  • Adjomayi P., DG-Eau (BEN)
  • Ba A., USTTB (MLI)
  • Boucher M., IRD (FRA)
  • Cohard J.M., Université de Grenoble (FRA)
  • Descloitres Marc, IRD (IND)
  • Descroix L., IRD (SEN)
  • Diawara Moriké, USTTB (MLI)
  • Dossou M., DG-Eau (BEN)
  • Favreau Guillaume, IRD (FRA)
  • Gangneron F., GET (FRA)
  • Gosset Marielle, GET (FRA)
  • Hector B., Université de Grenoble (FRA)
  • Hiernaux Pierre, GET (FRA)
  • Issoufou B.A., Université de Maradi (NER)
  • Kergoat Laurent, GET (FRA)
  • Lawin E., UAC (BEN)
  • Lebel T., IRD (FRA)
  • Legchenko A., Université de Grenoble (FRA)
  • Malam Abdou M., Université de Zinder (NER)
  • Malam-Issa Oumarou, IRD (NER)
  • Mamadou O., UAC (BEN)
  • Nazoumou Y., Université Abdou Moumouni (NER)
  • Pellarin Thierry, Université de Grenoble (FRA)
  • Quantin G., CNRS (FRA)
  • Sambou B., UCAD (SEN)
  • Seghieri Josiane, IRD (FRA)
  • Séguis Lus, IRD (FRA)
  • Vandervaere J.P., Université de Grenoble (FRA)
  • Vischel T., CNRS (FRA)
  • Vouillamoz J.M., Université de Grenoble (FRA)
  • Zannou A., DG-Eau (BEN)
  • Afouda S., Université de Grenoble (FRA)
  • Alhassane A., Université de Grenoble (FRA)
  • Arjounin M., Université de Grenoble (FRA)
  • Barral H., IRD (FRA)
  • Biron R., Université de Grenoble (FRA)
  • Cazenave F., Université de Grenoble (FRA)
  • Chaffard V., Université de Grenoble (FRA)
  • Chazarin J.P., IRD (FRA)
  • Guyard H., Université de Grenoble (FRA)
  • Koné A., Université de Grenoble (FRA)
  • Mainassara I., IRD (NER)
  • Mamane A., IRD (NER)
  • Oi M., IRD (FRA)
  • Ouani T., Université de Grenoble (FRA)
  • Soumaguel N., IRD (MLI)
  • Wubda M., Université de Grenoble (FRA)
  • Ago E.E., UAC (BEN)
  • Alle I.C., Université de Grenoble (FRA)
  • Allies A., IRD (FRA)
  • Arpin-Pont F., IRD (FRA)
  • Awessou B., IRD (FRA)
  • Cassé C., GET (FRA)
  • Charvet G., IRD (FRA)
  • Dardel C., GET (FRA)
  • Depeyre A., Université de Grenoble (FRA)
  • Diallo F.B., IPSL (FRA)
  • Do T., Université de Grenoble (FRA)
  • Fatras C., GET (FRA)
  • Frappart F., GET (FRA)
  • Gal L., GET (FRA)
  • Gascon T., Université de Grenoble (FRA)
  • Gibon François, Université de Grenoble (FRA)
  • Guiro I., UCAD (SEN)
  • Ingatan A., Université de Grenoble (FRA)
  • Kempf J., Université de Grenoble (FRA)
  • Kotchoni D.O.V., Université de Grenoble (FRA)
  • Lawson F.M.A., Université de Grenoble (FRA)
  • Leauthaud Crystèle, CIRAD-ES-UMR G-EAU (TUN)
  • Louvet S., Université de Grenoble (FRA)
  • Mason E., Université de Grenoble (FRA)
  • Nguyen C.C., GET (FRA)
  • Perrimond B., Université de Grenoble (FRA)
  • Pierre Caroline, GET (FRA)
  • Richard A., Université de Grenoble (FRA)
  • Robert E., GET (FRA)
  • Román-Cascón Carlos, Université de Grenoble (FRA)
  • Velluet C., IRD (FRA)
  • Wilcox C., Université de Grenoble (FRA)

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