Articles | Volume 384
https://doi.org/10.5194/piahs-384-43-2021
https://doi.org/10.5194/piahs-384-43-2021
Pre-conference publication
 | 
16 Nov 2021
Pre-conference publication |  | 16 Nov 2021

Studying recent hydroclimatic variability in Madagascar despite deficient measurement networks: use of CHIRPS and GRACE data at the scale of the Mahajunga province

Sylvain Bigot, Dominique Dumas, Télesphore Y. Brou, Rivo Ramboarison, Samuel Razanaka, and Nathalie Philippon

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Evolution des apports en eau dans la plaine rizicole de Marovoay par le fleuve Betsiboka (Madagascar)  : reconstitution et projections jusqu'en 2100
Dominique Dumas, Sylvain Bigot, Yao Télesphore Brou, Rivo Ramboarison, Samuel Razanaka, and Laurent Roger Robison
Proc. IAHS, 384, 175–179, https://doi.org/10.5194/piahs-384-175-2021,https://doi.org/10.5194/piahs-384-175-2021, 2021
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Cited articles

Ahmed, M., Sultan, M., Wahr, J., and Yan, E.: The use of GRACE data to monitor natural and anthropogenic induced variations in water availability across Africa, Earth-Sci. Rev., 136, 289–300, 2014. 
Bigot, S., Dumas, D., Brou, Y. T., Ramboarison, R., Razanaka, S., Descroix, L., Philippon, N., and Gwiazdzinski, L.: La difficulté du monitoring climatique à une échelle fine dans une région fortement impactée par la déforestation tropicale: la forêt sèche du parc national d'Ankarafantsika (Madagascar), Publications de l'Association Internationale de Climatologie, 31, 356–361, 2018. 
Bigot, S., Dumas, D., Brou, T., Curt, T., and Razanaka, S.: Feux de végétation et conditions pluviométriques à Madagascar (2001–2017), Publications de l'Association Internationale de Climatologie, 32, 169–174, 2019. 
Bigot, S., Dumas, D., Brou, T., Ramboarison, R., Razanaka, S., and Philippon N.: Etude hydroclimatique dans le nord-ouest de Madagascar: apport des données satellitaires GRACE, Publications de l'Association Internationale de Climatologie, 33, 121–126, 2020. 
Chaperon, P., Danloux, J., and Ferry, L.: Fleuves et rivières de Madagascar, in: Monographies hydrologiques, 10, ORSTOM, Paris, France, p. 874, 1993. 
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Short summary
Given the lack of in situ hydroclimatic measurements and networks in Madagascar, the GRACE (2003–2016) data, combined with other satellite data or fire monitoring, make it possible to establish an interannual assessment of certain climatic and environmental covariations at the northwest scale of the country. The results show a negative trend in continental rainfall and water content, but also a time lag in the linear variations and trends of the Water Equivalent Height and number of fires.