All Stories

  1. A Community Perspective on Hydrologic Science Opportunities for Earth Observations

    Article • August 2026, Aspen Global Change Institute

    John Reager

  2. Land–Ocean Pathways Linking Indo‐Pacific Sea Surface Temperature Variability to Tropical Atlantic Coastal Salinity

    Article • Journal of Geophysical Research Oceans, April 2026, American Geophysical Union (AGU)

    John Reager

  3. Advancing Water Security and National Preparedness Through Earth Science Observations and the Earth Science Workforce

    Article • Earth and Space Science, April 2026, American Geophysical Union (AGU)

    John Reager

  4. Human contributions to evapotranspiration mitigate swings in dry-to-wet year transitions

    Article • Communications Sustainability, January 2026, Springer Science + Business Media

    John Reager

  5. Earth Observations & the Earth Science Workforce: Advancing Water Security and National Preparedness

    Article • October 2025, Wiley

    John Reager

  6. Progress and future directions in constraining uncertainties in sea-level projections using observations

    Article • Nature Climate Change, September 2025, Springer Science + Business Media

    John Reager

  7. Revisiting Sub‐Surface Drought Cascades With Daily Satellite Observations of Soil Moisture and Terrestrial Water Storage

    Article • Water Resources Research, August 2025, American Geophysical Union (AGU)

    John Reager

  8. Unprecedented continental drying, shrinking freshwater availability, and increasing land contributions to sea level rise

    Article • Science Advances, July 2025, American Association for the Advancement of Science

    John Reager

  9. Probabilistic Hydroclimate Emulation with a Digital Twin Technology for Land Surface Model Ensembles

    Article • June 2025, Wiley

    John Reager

  10. Progress and outlook for constraining uncertainties in sea-level projections using observations

    Article • June 2025, Wiley

    John Reager

  11. Intrinsic Spatial Scales of River Stores and Fluxes and Their Relative Contributions to the Global Water Cycle

    Article • Geophysical Research Letters, February 2025, American Geophysical Union (AGU)

    John Reager

  12. Climate‐Induced Saltwater Intrusion in 2100: Recharge‐Driven Severity, Sea Level‐Driven Prevalence

    Article • Geophysical Research Letters, November 2024, American Geophysical Union (AGU)

    John Reager

  13. Modeling Groundwater Levels in California's Central Valley by Hierarchical Gaussian Process and Neural Network Regression

    Article • Journal of Geophysical Research Machine Learning and Computation, October 2024, American Geophysical Union (AGU)

    John Reager

  14. GRACE-FO: science results, mission status and outlook

    Article • September 2024, Copernicus GmbH

    John Reager

  15. Global water cycle ‘events’ and global mass redistribution at interannual to decadal time-scales

    Article • September 2024, Copernicus GmbH

    John Reager

  16. Field-scale crop water consumption estimates reveal potential water savings in California agriculture

    Article • Nature Communications, March 2024, Springer Science + Business Media

    John Reager

  17. The Salinity of Coastal Waters as a Bellwether for Global Water Cycle Changes

    Article • Geophysical Research Letters, December 2023, American Geophysical Union (AGU)

    John Reager

  18. Water Stress Dominates 21st‐Century Tropical Land Carbon Uptake

    Article • Global Biogeochemical Cycles, December 2023, American Geophysical Union (AGU)

    John Reager, Paul Levine

  19. Groundwater depletion in California’s Central Valley accelerates during megadrought

    Article • Nature Communications, December 2022, Springer Science + Business Media

    John Reager

  20. Global Terrestrial Water Storage Reconstruction Using Cyclostationary Empirical Orthogonal Functions (1979–2020)

    Article • Remote Sensing, November 2022, MDPI AG

    John Reager

  21. A Review of the Community Assessment Report (CAR) from the Mass Change Decadal Observable Applications Team

    Article • October 2022, Copernicus GmbH

    John Reager

  22. Remote Sensing of Groundwater: Current Capabilities and Future Directions

    Article • Water Resources Research, October 2022, American Geophysical Union (AGU)

    John Reager

  23. Groundwater Depletion in California’s Central Valley Accelerates During Megadrought

    Article • May 2022, Research Square

    John Reager

  24. Merging multiple observational data streams to constrain carbon uptake and water loss in the Amazon basin

    Article • March 2022, Copernicus GmbH

    John Reager, Paul Levine

  25. Information content of soil hydrology in a west Amazon watershed as informed by GRACE

    Article • Hydrology and Earth System Sciences, March 2022, Copernicus GmbH

    John Reager, Paul Levine

  26. CARDAMOM-FluxVal version 1.0: a FLUXNET-based validation system for CARDAMOM carbon and water flux estimates

    Article • Geoscientific Model Development, March 2022, Copernicus GmbH

    John Reager, Paul Levine

  27. Retraction Note: A 10 per cent increase in global land evapotranspiration from 2003 to 2019

    Article • Nature, February 2022, Springer Science + Business Media

    John Reager

  28. Influence of Nonseasonal River Discharge on Sea Surface Salinity and Height

    Article • Journal of Advances in Modeling Earth Systems, February 2022, American Geophysical Union (AGU)

    John Reager

  29. High‐Tide Floods and Storm Surges During Atmospheric Rivers on the US West Coast

    Article • Geophysical Research Letters, January 2022, American Geophysical Union (AGU)

    John Reager

  30. Filling the gap: Estimation of soil composition using InSAR, groundwater depth, and precipitation data in California’s Central Valley

    Article • November 2021, Wiley

    John Reager, Kyongsik Yun

  31. High-Tide Floods and Storm Surges During Atmospheric Rivers on the US West Coast

    Article • August 2021, Wiley

    John Reager

  32. High-Tide Floods and Storm Surges During Atmospheric Rivers on the US West Coast

    Article • August 2021, Wiley

    John Reager

  33. GRACE‐FO and ECOSTRESS Synergies Constrain Fine‐Scale Impacts on the Water Balance

    Article • Geophysical Research Letters, July 2021, American Geophysical Union (AGU)

    John Reager

  34. Drought Cascade in the Terrestrial Water Cycle: Evidence From Remote Sensing

    Article • Geophysical Research Letters, July 2021, American Geophysical Union (AGU)

    John Reager

  35. CARDAMOM-FluxVal Version 1.0: a FLUXNET-based Validation System for CARDAMOM Carbon and Water Flux Estimates

    Article • July 2021, Copernicus GmbH

    John Reager, Paul Levine

  36. Supplementary material to "CARDAMOM-FluxVal Version 1.0: a FLUXNET-based Validation System for CARDAMOM Carbon and Water Flux Estimates"

    Article • July 2021, Copernicus GmbH

    John Reager, Paul Levine

  37. RETRACTED ARTICLE: A 10 per cent increase in global land evapotranspiration from 2003 to 2019

    Article • Nature, May 2021, Springer Science + Business Media

    John Reager

  38. The Seasonality of Global Land and Ocean Mass and the Changing Water Cycle

    Article • Geophysical Research Letters, April 2021, American Geophysical Union (AGU)

    John Reager

  39. Information content of soil hydrology in the Amazon as informed by GRACE

    Article • March 2021, Copernicus GmbH

    John Reager, Paul Levine

  40. Supplementary material to "Information content of soil hydrology in the Amazon as informed by GRACE"

    Article • March 2021, Copernicus GmbH

    John Reager, Paul Levine

  41. Satellite Observations of the Tropical Terrestrial Carbon Balance and Interactions With the Water Cycle During the 21st Century

    Article • Reviews of Geophysics, March 2021, American Geophysical Union (AGU)

    John Reager

  42. Estimation of hydrological drought recovery based on precipitation and Gravity Recovery and Climate Experiment (GRACE) water storage deficit

    Article • Hydrology and Earth System Sciences, February 2021, Copernicus GmbH

    John Reager

  43. Lagged effects regulate the inter-annual variability of the tropical carbon balance

    Article • Biogeosciences, December 2020, Copernicus GmbH

    John Reager

  44. GRACE/GRACE-FO to constrain regional to global Evapotranspiration

    Article • October 2020, Copernicus GmbH

    John Reager

  45. Divergent effects of climate change on future groundwater availability in key mid-latitude aquifers

    Article • Nature Communications, July 2020, Springer Science + Business Media

    John Reager

  46. Understanding of Contemporary Regional Sea‐Level Change and the Implications for the Future

    Article • Reviews of Geophysics, July 2020, American Geophysical Union (AGU)

    John Reager

  47. Satellite hydrology observations as operational indicators of forecasted fire danger across the contiguous United States

    Article • Natural Hazards and Earth System Science, April 2020, Copernicus GmbH

    John Reager

  48. Global partitioning of runoff generation mechanisms using remote sensing data

    Article • Hydrology and Earth System Sciences, March 2020, Copernicus GmbH

    John Reager

  49. A User Needs Assessment for the next Mass Change Satellite Mission

    Article • March 2020, Copernicus GmbH

    John Reager

  50. GRACE‐based Mass Conservation as a Validation Target for Basin‐Scale Evapotranspiration in the Contiguous United States

    Article • Water Resources Research, February 2020, American Geophysical Union (AGU)

    John Reager

  51. Lagged effects dominate the inter-annual variability of the 2010–2015 tropical carbon balance

    Article • January 2020, Copernicus GmbH

    John Reager

  52. Supplementary material to "Lagged effects dominate the inter-annual variability of the 2010–2015 tropical carbon balance"

    Article • January 2020, Copernicus GmbH

    John Reager

  53. Estimation of hydrological drought recovery based on GRACE water storage deficit

    Article • December 2019, Copernicus GmbH

    John Reager

  54. Using GRACE in a streamflow recession to determine drainable water storage in the Mississippi River basin

    Article • Hydrology and Earth System Sciences, August 2019, Copernicus GmbH

    John Reager

  55. Analytical Propagation of Runoff Uncertainty Into Discharge Uncertainty Through a Large River Network

    Article • Geophysical Research Letters, July 2019, American Geophysical Union (AGU)

    John Reager

  56. Global partitioning of runoff generation mechanisms using remote sensing data

    Article • July 2019, Copernicus GmbH

    John Reager

  57. Statistical Mapping of Freshwater Origin and Fate Signatures as Land/Ocean “Regions of Influence” in the Gulf of Mexico

    Article • Journal of Geophysical Research Oceans, July 2019, American Geophysical Union (AGU)

    John Reager

  58. Satellite Hydrology Observations as Operational Indicators of Forecasted Fire Danger across the Contiguous United States

    Article • May 2019, Copernicus GmbH

    John Reager

  59. Amplitude Modulation of Seasonal Variability in Terrestrial Water Storage

    Article • Geophysical Research Letters, April 2019, American Geophysical Union (AGU)

    John Reager

  60. The Dominant Global Modes of Recent Internal Sea Level Variability

    Article • Journal of Geophysical Research Oceans, April 2019, American Geophysical Union (AGU)

    John Reager

  61. Supplementary material to "Using GRACE in a streamflow recession to determine drainable water storage in the Mississippi River Basin"

    Article • February 2019, Copernicus GmbH

    John Reager

  62. Using GRACE in a streamflow recession to determine drainable water storage in the Mississippi River Basin

    Article • February 2019, Copernicus GmbH

    John Reager

  63. Publisher Correction: Recent global decline in endorheic basin water storages

    Article • Nature Geoscience, February 2019, Springer Science + Business Media

    Mr Hannes Müller Schmied, John Reager

  64. Recent global decline in endorheic basin water storages

    Article • Nature Geoscience, November 2018, Springer Science + Business Media

    Mr Hannes Müller Schmied, John Reager

  65. Water Column Stability and the Role of Velocity Shear on a Seasonally Stratified Shelf, Mississippi Bight, Northern Gulf of Mexico

    Article • Journal of Geophysical Research Oceans, August 2018, American Geophysical Union (AGU)

    Dr Brian Dzwonkowski, John Reager

  66. CYGNSS data map flood inundation during the 2017 Atlantic hurricane season

    Article • Scientific Reports, June 2018, Springer Science + Business Media

    John Reager

  67. The Total Drainable Water Storage of the Amazon River Basin: A First Estimate Using GRACE

    Article • Water Resources Research, May 2018, American Geophysical Union (AGU)

    John Reager

  68. Observation-Driven Estimation of the Spatial Variability of 20thCentury Sea Level Rise

    Article • Journal of Geophysical Research Oceans, March 2018, American Geophysical Union (AGU)

    John Reager

  69. A Statistical Graphical Model of the California Reservoir System

    Article • Water Resources Research, November 2017, Wiley

    John Reager

  70. Using GRACE to constrain precipitation amount over cold mountainous basins

    Article • Geophysical Research Letters, January 2017, American Geophysical Union (AGU)

    John Reager

  71. A decade of sea level rise slowed by climate-driven hydrology

    Article • Science, February 2016, American Association for the Advancement of Science

    John Reager

  72. GRACE storage-runoff hystereses reveal the dynamics of regional watersheds

    Article • Hydrology and Earth System Sciences, July 2015, Copernicus GmbH

    John Reager

  73. GRACE storage-streamflow hystereses reveal the dynamics of regional watersheds

    Article • October 2014, Copernicus GmbH

    John Reager

  74. River basin flood potential inferred using GRACE gravity observations at several months lead time

    Article • Nature Geoscience, July 2014, Nature

    John Reager

  75. A GRACE‐based water storage deficit approach for hydrological drought characterization

    Article • Geophysical Research Letters, March 2014, American Geophysical Union (AGU)

    John Reager

  76. Global terrestrial water storage capacity and flood potential using GRACE

    Article • Geophysical Research Letters, December 2009, American Geophysical Union (AGU)

    John Reager