GRACE-Based Estimates of Terrestrial Freshwater Discharge from Basin to Continental Scales

Abstract In this study, new estimates of monthly freshwater discharge from continents, drainage regions, and global land for the period of 2003–05 are presented. The method uses observed terrestrial water storage change estimates from the Gravity Recovery and Climate Experiment (GRACE) and reanalysis-based atmospheric moisture divergence and precipitable water tendency in a coupled land–atmosphere water mass balance. The estimates of freshwater discharge are analyzed within the context of global climate and compared with previously published estimates. Annual cycles of observed streamflow exhibit stronger correlations with the computed discharge compared to those with precipitation minus evapotranspiration (P − E) in several of the world’s largest river basins. The estimate presented herein of the mean monthly discharge from South America (∼846 km3 month−1) is the highest among the continents and that flowing into the Atlantic Ocean (∼1382 km3 month−1) is the highest among the drainage regions. The volume...

[1]  Eric F. Wood,et al.  Predicting the Discharge of Global Rivers , 2001, Journal of Climate.

[2]  Dennis P. Lettenmaier,et al.  Tracking Fresh Water from Space , 2003, Science.

[3]  Frédéric Frappart,et al.  Time variations of land water storage from an inversion of 2 years of GRACE geoids , 2005 .

[4]  Robert A. Berner,et al.  The Global Water Cycle , 1987 .

[5]  C. Vörösmarty,et al.  Global water resources: vulnerability from climate change and population growth. , 2000, Science.

[6]  S. Seneviratne,et al.  Basin scale estimates of evapotranspiration using GRACE and other observations , 2004 .

[7]  Matthew Rodell,et al.  Contemporary estimates of Pan‐Arctic freshwater discharge from GRACE and reanalysis , 2007 .

[8]  Paul R. Houser,et al.  Assessing a Satellite-Era Perspective of the Global Water Cycle , 2007 .

[9]  A. Dai,et al.  Hydrometeorology of the Amazon in ERA-40 , 2005 .

[10]  P. Gleick.  Global Freshwater Resources: Soft-Path Solutions for the 21st Century , 2003, Science.

[11]  Matthew Rodell,et al.  Total basin discharge for the Amazon and Mississippi River basins from GRACE and a land‐atmosphere water balance , 2005 .

[12]  J. Peixoto,et al.  Physics of climate , 1984 .

[13]  R. Steven Nerem,et al.  Preliminary observations of global ocean mass variations with GRACE , 2004 .

[14]  Matthew Rodell,et al.  Attenuation effect on seasonal basin-scale water storage changes from GRACE time-variable gravity , 2007 .

[15]  A. Baumgartner.  The world water balance , 1975 .

[16]  A. Betts,et al.  NCEP-NCAR and ECMWF Reanalysis Surface Water and Energy Budgets for the Mississippi River Basin , 2000 .

[17]  B. D. Tapley,et al.  Satellite Gravity Measurements Confirm Accelerated Melting of Greenland Ice Sheet , 2006, Science.

[18]  Lifeng Luo,et al.  Streamflow and water balance intercomparisons of four land surface models in the North American Land Data Assimilation System Project , 2004 .

[19]  Taikan Oki,et al.  Global atmospheric water balance and runoff from large river basins , 1995 .

[20]  Petra Döll,et al.  GRACE observations of changes in continental water storage , 2006 .

[21]  Kevin E. Trenberth,et al.  Estimates of Freshwater Discharge from Continents: Latitudinal and Seasonal Variations , 2002 .

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

[23]  W. Gutowski,et al.  Atmospheric Water Vapor Transport in NCEP–NCAR Reanalyses: Comparison with River Discharge in the Central United States , 1997 .

[24]  S. Swenson,et al.  Post‐processing removal of correlated errors in GRACE data , 2006 .

[25]  J. Wahr,et al.  Acceleration of Greenland ice mass loss in spring 2004 , 2006, Nature.

[26]  Guillaume Ramillien,et al.  Interannual variations of the mass balance of the Antarctica and Greenland ice sheets from GRACE , 2006 .

[27]  S. Swenson,et al.  Estimated accuracies of regional water storage variations inferred from the Gravity Recovery and Climate Experiment (GRACE) , 2003 .

[28]  Matthew Rodell,et al.  Spatial sensitivity of the Gravity Recovery and Climate Experiment (GRACE) time‐variable gravity observations , 2005 .

[29]  John C. Rodda,et al.  Towards a world hydrological cycle observing system , 1993 .

[30]  John C. Rodda,et al.  World water resources at the beginning of the twenty-first century , 2004 .

[31]  G. Niu,et al.  Assessing a land surface model's improvements with GRACE estimates , 2006 .

[32]  Elfatih A. B. Eltahir,et al.  Hydroclimatology of Illinois: A comparison of monthly evaporation estimates based on atmospheric water balance and soil water balance , 1998 .

[33]  Eric F. Wood,et al.  A pan‐arctic evaluation of changes in river discharge during the latter half of the 20th century , 2005 .

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

[35]  J. Wahr,et al.  Measurements of Time-Variable Gravity Show Mass Loss in Antarctica , 2006, Science.

[36]  Douglas A. Miller,et al.  GCIP water and energy budget synthesis (WEBS) , 2002 .

[37]  J. Probst,et al.  Long range streamflow and world continental runoff fluctuations since the beginning of this century , 1987 .

[38]  S. Swenson,et al.  Accuracy of GRACE mass estimates , 2006 .

[39]  Charles J Vörösmarty,et al.  Widespread decline in hydrological monitoring threatens Pan-Arctic Research , 2002 .

[40]  Russell G. Congalton,et al.  Evaluating the potential for measuring river discharge from space , 2003 .

[41]  Ming-Jen Yang,et al.  The Coastal Observation and Simulation with Topography (COAST) Experiment , 1997 .

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

[43]  S. Swenson,et al.  Climate model biases in seasonality of continental water storage revealed by satellite gravimetry , 2006 .

[44]  Filipe Aires,et al.  Remote sensing of global wetland dynamics with multiple satellite data sets , 2001 .

[45]  Development of a parallel river transport algorithm and applications to climate studies , 2001 .

[46]  Frédéric Frappart,et al.  Evolution of high‐latitude snow mass derived from the GRACE gravimetry mission (2002–2004) , 2006 .

[47]  Hugo A. Loáiciga,et al.  Groundwater fluxes in the global hydrologic cycle: past, present and future , 1993 .

[48]  D. Lettenmaier,et al.  Measuring surface water from space , 2004 .

[49]  Kevin E. Trenberth,et al.  Evaluation of the atmospheric moisture and hydrological cycle in the NCEP/NCAR reanalyses , 1998 .

[50]  C. Revenga,et al.  Fragmentation and Flow Regulation of the World's Large River Systems , 2005, Science.

[51]  Sonia I. Seneviratne,et al.  Inferring changes in terrestrial water storage using ERA-40 reanalysis data: The Mississippi River Basin , 2004 .

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

[53]  John Wahr,et al.  Estimating Large-Scale Precipitation Minus Evapotranspiration from GRACE Satellite Gravity Measurements , 2006 .

[54]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[55]  K. Trenberth,et al.  Estimates of the Global Water Budget and Its Annual Cycle Using Observational and Model Data , 2007 .

[56]  Philip B. Duffy,et al.  An extended data set of river discharges for validation of general circulation models , 1996 .

[57]  Clark R. Wilson,et al.  Simulated estimation of hydrological loads from GRACE , 2005 .

[58]  E. Fischer,et al.  Contribution of land‐atmosphere coupling to recent European summer heat waves , 2007 .

[59]  F. LeMoine,et al.  Resolving mass flux at high spatial and temporal resolution using GRACE intersatellite measurements , 2005 .

[60]  Matthew Rodell,et al.  Detectability of variations in continental water storage from satellite observations of the time dependent gravity field , 1999 .

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

[62]  A. Cazenave,et al.  Time variations of the regional evapotranspiration rate from Gravity Recovery and Climate Experiment (GRACE) satellite gravimetry , 2006 .

[63]  Michael T. Coe,et al.  Modeling terrestrial hydrological systems at the continental scale : Testing the accuracy of an atmospheric GCM , 2000 .

[64]  D. Lettenmaier,et al.  Anthropogenic impacts on continental surface water fluxes , 2006 .

[65]  Erik Stokstad,et al.  Scarcity of Rain, Stream Gages Threatens Forecasts , 1999, Science.

[66]  S. Swenson,et al.  A comparison of terrestrial water storage variations from GRACE with in situ measurements from Illinois , 2006 .

[67]  J. Famiglietti,et al.  Estimating groundwater storage changes in the Mississippi River basin (USA) using GRACE , 2007 .

[68]  S. Swenson,et al.  Remote sensing of groundwater storage changes in Illinois using the Gravity Recovery and Climate Experiment (GRACE) , 2006 .

[69]  Jeffrey B. Basara,et al.  Estimating profile soil moisture and groundwater variations using GRACE and Oklahoma Mesonet soil moisture data , 2008 .

[70]  Son V. Nghiem,et al.  Space‐based measurement of river runoff , 2005 .

[71]  C. Shum,et al.  Non-isotropic filtering of GRACE temporal gravity for geophysical signal enhancement , 2005 .

[72]  R. Nerem,et al.  Recent Greenland Ice Mass Loss by Drainage System from Satellite Gravity Observations , 2006, Science.

[73]  Charles J Vörösmarty,et al.  Global system of rivers: Its role in organizing continental land mass and defining land‐to‐ocean linkages , 2000 .

[74]  Wolfgang Grabs,et al.  High‐resolution fields of global runoff combining observed river discharge and simulated water balances , 2002 .

[75]  F. Bryan,et al.  Time variability of the Earth's gravity field: Hydrological and oceanic effects and their possible detection using GRACE , 1998 .

[76]  D. Bromwich,et al.  The Atmospheric Hydrologic Cycle over the Arctic Basin from Reanalyses. Part I: Comparison with Observations and Previous Studies* , 2000 .