Article Dans Une Revue Vadose Zone Journal Année : 2018

AMMA-CATCH, a critical zone observatory in West Africa monitoring a megion in transition

Sylvie Galle (1) , Manuela Grippa (2) , Christophe Peugeot (3) , Ibrahim Bouzou Moussa (4) , Bernard Cappelaere (3) , Jérôme Demarty (3) , Éric Mougin (5) , Gérémy Panthou (1) , Philippe Adjomayi (6) , Euloge K Agbossou (7) , A. Bâ (8) , Marie Boucher (1) , Jean-Martial Cohard (1) , Marc Descloitres (1) , Luc Descroix (9) , M. Diawara (8) , M. Dossou (6) , Guillaume Favreau (1, 3) , Fabrice Gangneron (2) , Marielle Gosset (2) , Basile Hector (1) , Pierre Hiernaux (2) , Bil-Assanou Issoufou (10) , Laurent Kergoat (2) , Emmanuel Lawin (7) , Thierry Lebel (1) , Anatoli Legchenko (1) , Moussa Malam Abdou (11) , Oumarou Malam Issa (12) , Yahaya Nazoumou (4) , Thierry Pellarin (1) , Guillaume Quantin (1) , Bienvenu Sambou (13) , Josiane Seghieri (3) , Luc Séguis (3) , Jean-Pierre Vandervaere (1) , Théo Vischel (1) , Jean-Michel Vouillamoz (1) , Arnaud Zannou (6) , Simon Afouda (1, 12) , Abassa Alhassane (1, 12) , Marc Arjounin (1, 12) , Hélène Barral (3) , Romain Biron (1) , Frédéric Cazenave (1) , Véronique Chaffard (1) , Jean-Philippe Chazarin (3) , Hélène Guyard (1) , Abdoulaye Koné (1, 12) , Ibrahim Maïnassara (3, 12) , Aliko Mamane (12) , Monique Oi (3) , Théo Ouani (1, 12) , Nogmana Soumaguel (12) , Maxime Wubda (1, 12) , Expedit Evariste Ago (7) , Iboukoun Christian Alle (1, 7) , Aubin Alliès (3) , Lauren Arpin-Pont (3) , Beranger Awessou (3, 7) , Claire Cassé (2) , Guillaume Charvet (3) , Cécile Dardel (2) , Arnaud Depeyre (1) , Fatoumata Diallo (14) , T. Do , Christophe Fatras (2) , Frédéric Frappart (2) , Laetitia Gal (2) , Tania Gascon (1) , François Gibon (1) , Idrissa Guiro (13) , Aghali Ingatan Warzagan (1) , Jean Kempf (1) , D. O. Valérie Kotchoni (1, 7) , Fabrice Messan Amene Lawson (1, 7) , Crystèle Léauthaud (3, 15) , Samuel Louvet (1) , Eloïse Mason (1) , Cam-Chi Nguyen (2) , Benoît Perrimond (1) , Caroline Pierre (2, 16) , A. Richard (1) , Elodie Robert (2) , Carlos Román-Cascón (1) , Cécile Velluet (3) , Catherine Wilcox (1)
Manuela Grippa
Christophe Peugeot
Bernard Cappelaere
Jérôme Demarty
Éric Mougin
  • Fonction : Auteur
  • PersonId : 867982
Luc Descroix
Fabrice Gangneron
Marielle Gosset
Pierre Hiernaux
Laurent Kergoat
Oumarou Malam Issa
Josiane Seghieri
Luc Séguis
Aubin Alliès
Lauren Arpin-Pont
  • Fonction : Auteur
  • PersonId : 1310671
  • IdRef : 200493779
Claire Cassé
  • Fonction : Auteur
  • PersonId : 779294
  • IdRef : 195706811
Guillaume Charvet
Cécile Dardel
  • Fonction : Auteur
  • PersonId : 952291
T. Do
  • Fonction : Auteur
Frédéric Frappart
Laetitia Gal
  • Fonction : Auteur
  • PersonId : 1003570
Jean Kempf
  • Fonction : Auteur
  • PersonId : 1094752
Eloïse Mason
Benoît Perrimond
  • Fonction : Auteur
  • PersonId : 775414
  • IdRef : 189006803
Elodie Robert
Cécile Velluet
  • Fonction : Auteur
  • PersonId : 957183

Résumé

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.
Fichier principal
Vignette du fichier
galle et al 2018.pdf (2.15 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Loading...

Dates et versions

ird-02153117 , version 1 (12-06-2019)
ird-02153117 , version 2 (27-01-2021)

Licence

Identifiants

Citer

Sylvie Galle, Manuela Grippa, Christophe Peugeot, Ibrahim Bouzou Moussa, Bernard Cappelaere, et al.. AMMA-CATCH, a critical zone observatory in West Africa monitoring a megion in transition. Vadose Zone Journal, 2018, 17 (1), pp.1-24. ⟨10.2136/vzj2018.03.0062⟩. ⟨ird-02153117v1⟩

Collections

ONERA
1133 Consultations
412 Téléchargements

Altmetric

Partager

More