External geophysics, climate and environment Global land water storage change from GRACE over 2002-2009; Inference on sea level

Global change in land water storage and its effect on sea level is estimated over a 7-year time span (August 2002 to July 2009) using space gravimetry data from GRACE. The 33 World largest river basins are considered. We focus on the year-to-year variability and construct a total land water storage time series that we further express in equivalent sea level time series. The short-term trend in total water storage adjusted over this 7-year time span is positive and amounts to 80.6 +/- 15.7 km(3)/yr (net water storage excess). Most of the positive contribution arises from the Amazon and Siberian basins (Lena and Yenisei). followed by the Zambezi. Orinoco and Ob basins. The largest negative contributions (water deficit) come from the Mississippi, Ganges, Brahmaputra, Aral, Euphrates, Indus and Parana. Expressed in terms of equivalent sea level, total water volume change over 2002-2009 leads to a small negative contribution to sea level of -0.22 +/- 0.05 mm/yr. The time series for each basin clearly show that year-to-year variability dominates so that the value estimated in this study cannot be considered as representative of a long-term trend. We also compare the interannual variability of total land water storage (removing the mean trend over the studied time span) with interannual variability in sea level (corrected for thermal expansion). A correlation of similar to 0.6 is found. Phasing, in particular, is correct. Thus, at least part of the interannual variability of the global mean sea level can be attributed to land water storage fluctuations. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

[1]  M. Watkins,et al.  GRACE Measurements of Mass Variability in the Earth System , 2004, Science.

[2]  Jeffrey P. Walker,et al.  THE GLOBAL LAND DATA ASSIMILATION SYSTEM , 2004 .

[3]  Byron D. Tapley,et al.  Seasonal global water mass budget and mean sea level variations , 1998 .

[4]  V. Gornitz.  Chapter 5 Impoundment, groundwater mining, and other hydrologic transformations: Impacts on global sea level rise , 2001 .

[5]  H. L. Miller,et al.  Climate Change 2007: The Physical Science Basis , 2007 .

[6]  J. Famiglietti,et al.  Satellite-based estimates of groundwater depletion in India , 2009, Nature.

[7]  Anny Cazenave,et al.  Contemporary sea level rise. , 2010, Annual review of marine science.

[8]  P. Döll,et al.  A global hydrological model for deriving water availability indicators: model tuning and validation , 2003 .

[9]  Kimio Hanawa,et al.  Observations: Oceanic Climate Change and Sea Level , 2007 .

[10]  B. Chao,et al.  Impact of Artificial Reservoir Water Impoundment on Global Sea Level , 2008, Science.

[11]  J. Kusche,et al.  Hydrological Signals Observed by the GRACE Satellites , 2008 .

[12]  Archie Paulson,et al.  FAST TRACK PAPER: Inference of mantle viscosity from GRACE and relative sea level data , 2007 .

[13]  Victor Zlotnicki,et al.  Title Time-variable gravity from GRACE : First results Permalink , 2004 .

[14]  A. Cazenave,et al.  A new assessment of global mean sea level from altimeters highlights a reduction of global trend from 2005 to 2008 , 2009 .

[15]  D. Sahagian.  Global physical effects of anthropogenic hydrological alterations: sea level and water redistribution , 2000 .

[16]  S. Swenson,et al.  Methods for inferring regional surface‐mass anomalies from Gravity Recovery and Climate Experiment (GRACE) measurements of time‐variable gravity , 2002 .

[17]  T. Huntington.  Can we dismiss the effect of changes in land‐based water storage on sea‐level rise? , 2008 .

[18]  A. Cazenave,et al.  Perspectives on present-day sea level change: a tribute to Christian le Provost , 2006 .

[19]  D. Chambers.  Evaluation of new GRACE time‐variable gravity data over the ocean , 2006 .

[20]  B. Tapley,et al.  2005 drought event in the Amazon River basin as measured by GRACE and estimated by climate models , 2009 .

[21]  B. Chao.  Anthropogenic impact on global geodynamics due to reservoir water impoundment , 1995 .

[22]  A. Cazenave,et al.  Contribution of climate-driven change in continental water storage to recent sea-level rise , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[23]  A. Cazenave,et al.  Terrestrial Water‐Storage Contributions to Sea‐Level Rise and Variability , 2010 .

[24]  V. M. Tiwari,et al.  Dwindling groundwater resources in northern India, from satellite gravity observations , 2009 .

[25]  T. Oki,et al.  Design of Total Runoff Integrating Pathways (TRIP)—A Global River Channel Network , 1998 .

[26]  J. Famiglietti,et al.  Terrestrial water mass load changes from Gravity Recovery and Climate Experiment (GRACE) , 2006 .

[27]  J. Holden,et al.  The storage and aging of continental runoff in large reservoir systems of the world , 1997 .

[28]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[29]  Gilles Larnicol,et al.  On the Use of Satellite Altimeter Data in Argo Quality Control , 2009 .

[30]  Victor Zlotnicki,et al.  Time‐variable gravity from GRACE: First results , 2004 .

[31]  Guillaume Ramillien,et al.  Detection of Continental Hydrology and Glaciology Signals from GRACE: A Review , 2008 .

[32]  A. Cazenave,et al.  A new assessment of the error budget of global mean sea level rate estimated by satellite altimetry over 1993–2008 , 2009 .

[33]  A. Cazenave,et al.  Effects of land water storage on global mean sea level over the past half century , 2005 .

[34]  A. Cazenave,et al.  Land water storage contribution to sea level from GRACE geoid data over 2003–2006 , 2008 .

[35]  Matthew Rodell,et al.  Analysis of terrestrial water storage changes from GRACE and GLDAS , 2008 .

[36]  Anny Cazenave,et al.  Present-day sea-level change: A review , 2006 .