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Title

Recent hydrological behavior of the East African great lakes region inferred from GRACE, satellite altimetry and rainfall observations

Publication Year

2010

Author(s)
  • Becker, Melanie
  • LLovel, William
  • Cazenave, Anny
  • Guentner, Andreas
  • Cretaux, Jean-Francois
Source
COMPTES RENDUS GEOSCIENCE Volume: 342 Issue: 3 Pages: 223-233 Published: 2010
ISSN
1631-0713 eISSN: 1778-7025
Abstract

We have jointly analysed space gravimetry data from the GRACE space mission, satellite altimetry data and precipitation over the East African Great Lakes region, in order to study the spatiotemporal variability of hydrological parameters (total water storage, lake water volume and rainfall). We find that terrestrial water storage (TWS) from GRACE and precipitation display a common mode of variability at interannual time scale, with a minimum in late 2005, followed by a rise in 2006-2007. We argue that this event is due to forcing by the strong 2006 Indian Ocean Dipole (IOD) on East African rainfall. We also show that GRACE TWS is linked to the El Nino-Southern Oscillation cycle. Combination of the altimetry-based lake water volume with TWS from GRACE over the lakes drainage basins allows estimating soil moisture and groundwater volume variations. Comparison with the WGHM hydrological model outputs is performed and discussed. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

Author Keyword(s)
  • GRACE
  • Altimetry
  • Lakes
  • ENSO
  • Climate change
  • East Africa
KeyWord(s) Plus
  • INDIAN-OCEAN DIPOLE
  • CLIMATE EXPERIMENT GRACE
  • SEA-SURFACE TEMPERATURE
  • TIME-VARIABLE GRAVITY
  • MODE EVENTS
  • SHORT RAINS
  • VARIABILITY
  • LEVEL
  • ANOMALIES
  • TOPEX/POSEIDON
ESI Discipline(s)
  • Geosciences
Web of Science Category(ies)
  • Geosciences, Multidisciplinary
Adress(es)

[Becker, Melanie; LLovel, William; Cazenave, Anny; Cretaux, Jean-Francois] IRD, UPS, CNRS, CNES,LEGOS GOHS,UMR5566, F-31400 Toulouse, France; [Guentner, Andreas] German Res Ctr Geosci, GFZ, Potsdam, Germany

Reprint Adress

Becker, M (reprint author), IRD, UPS, CNRS, CNES,LEGOS GOHS,UMR5566, 18 Ave E Belin, F-31400 Toulouse, France.

Country(ies)
  • France
  • Germany
CNRS - Adress(es)
  • Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), UMR5566
Accession Number
WOS:000277665400006
uid:/XV2WJDMQ
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