Sean C. Swenson Climate and Global Dynamics P.O. Box 3000 swensosc@ucar.edu National Center for Atmospheric Research (303) 497-1761 Boulder, CO 80307 Education Ph.D. University of Colorado at Boulder, Department of Physics, December 2002. Thesis title: Techniques for Recovering Surface Mass Variability from Satellite Measurements of Time-variable Gravity, supervised by Professor John Wahr. B.A. Cornell University, Physics, June 1996 Research/Professional Experience Associate Scientist Oct 2008 - Present Post-doctoral Fellow Sep 2006 - Sep 2008 Post-doctoral Research Associate Dec 2002 - Aug 2006 Terrestrial Sciences Section, National Center for Atmospheric Research. Developed and calibrated wetland model in CLM. Validated high latitude winter precipitation estimates from global satellite analyses. Validated snow water equivalent from microwave satellite techniques. Developed gridded GRACE terrestrial water storage dataset for JPL Tellus website (http://grace.jpl.nasa.gov/data/gracemonthlymassgridsland/). Advanced Study Program, National Center for Atmospheric Research. Assessed Community Land Model (CLM) simulations with GRACE data. Used combination of GRACE and in situ soil moisture data to estimate regional groundwater variations in Oklahoma. Performed multi-sensor analysis of lake height variations. Developed surface water component for CLM. Computed first observational based water balance of Lake Victoria, and quantified human role in lake decline. Department of Physics, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado. Applied GRACE data to studies of the Earth s large-scale water balance. Established and employed a framework for using GRACE data to help assess and validate land surface and atmospheric models. Developed techniques to remove correlated errors in GRACE data, greatly increasing spatial resolution. Designed website and necessary software for a real-time GRACE data analysis program (http://geoid.colorado.edu/grace/grace.php). Performed dual validation ofgrace andin situ datausingsoil moistureand groundwater measurements in Illinois.
Research Assistant June 1998 - Dec 2002 Publications Department of Physics, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado. Investigated methods for processing satellite gravity data from the GRACE satellite mission. Developed and assessed models of atmospheric density structure for the removal of atmospheric noise from GRACE data. Developed techniques for minimizing errors in estimates of surface-mass variability from GRACE data. Swenson, S.C., and D. M. Lawrence, and H. Lee, Improved simulation of the terrestrial hydrological cycle in permafrost regions by the Community Land Model, J. Adv. Model. Earth Syst., 4, doi:10.1029/2012ms000165, 2012. Landerer, F., and S. Swenson, Accuracy of scaled GRACE terrestrial water storage estimates, Wat. Resour. Res., 48, doi:10.1029/2011wr011453, 2012. Swenson, S., and J. Wahr, Estimating Signal Loss in Regularized GRACE Gravity Field Solutions, Geophys. J. Int., 185: 693-702. doi: 10.1111/j.1365-246X.2011.04977.x, 2011. Swenson, S., Assessing High-Latitude Winter Precipitation from Global Precipitation Analyses Using GRACE, J. Hydrometeor., 11(2), 405-420, 2010. Swenson, S., and J. Wahr, Monitoring the Water Balance of Lake Victoria, East Africa, from Space, J. Hydrol., 370, 163-176, doi:10.1016/j.jhydrol.2009.03.008, 2009. Swenson, S., J. Famiglietti, J. Basara, and J. Wahr, Estimating Profile Soil Moisture and Groundwater Storage Variations in the Southern Great Plains Using GRACE Satellite Gravimetric and Oklahoma Mesonet Soil Moisture Data, Wat. Resour. Res., 44, W01413, doi:10.1029/2007wr006057, 2008. Swenson, S., D. Chambers, and J. Wahr, Estimating Geocenter Variations from a Combination of GRACE and Ocean Model Output, J. Geophys. Res. - Solid Earth, 113, B08410, doi:10.1029/2007jb005338, 19 August 2008. Swenson, S., and J. Wahr, Multi-sensor analysis of water storage variations of the Caspian Sea, Geophys. Res. Lett., 34, L16401, doi:10.1029/2007gl030733, 2007. Yeh, P. J.-F., S. Swenson, J. Famiglietti, and M. Rodell, Remote sensing of groundwater storage changes in Illinois using the Gravity Recovery and Climate Experiment (GRACE), Water Resour. Res.., 42, W12203, doi:10.1029/2006wr005374, 2006. Swenson, S., P. J.-F. Yeh, J. Wahr, and J. Famiglietti, A comparison of terrestrial water storage variations from GRACE with in situ measurements from Illinois, Geophys. Res. Lett., 33, L16401, doi:10.1029/2006gl026962, 2006. Swenson, S., and J. Wahr, Post-processing removal of correlated errors in GRACE data, Geophys. Res. Lett., 33, L08402, doi:10.1029/2005gl025285, 2006. Wahr, J., S. Swenson, and I. Velicogna, The Accuracy of GRACE Mass Estimates, Geophys. Res. Lett., 33, L06401, doi:10.1029/2005gl025305, 2006. Swenson, S., and P.C.D. Milly, Systematic Climate-Model Errors in Seasonal Water Storage on Continents Revealed by Satellite Gravimetry, Water Resour. Res., Vol. 42, No. 3, W03201, 10.1029/2005WR004628,01 March, 2006. Swenson, S., and J. Wahr, Estimating Large-scale Precipitation Minus Evapotranspiration from GRACE Satellite Gravity Measurements, J. Hydrometeorology, 7(2), 252-270, doi: 10.1175/JHM478.1, 2006. Wahr, J., S. Swenson, V. Zlotnicki, I. Velicogna, Time-Variable Gravity from GRACE: First Results, Geophys. Res. Lett., 31, doi:10.1029/2004gl019779, 2004.
Swenson, S., J. Wahr, and P.C.D. Milly, Estimated accuracies of regional water storage anomalies inferred from GRACE, Water Resour. Res., 39(8), 1223, doi:10.1029/2002wr001808, 2003. Swenson, S., and J. Wahr, Monitoring Changes in Continental Water Storage With GRACE, Space Sci. Rev., 108, 345-354, 2003. Swenson, S., and J. Wahr, Estimated effects of the vertical structure of atmospheric mass on the time-variable geoid, J. Geophys. Res., 107(B9), 2194, doi:10.1029/2000jb000024, 2002. Swenson, S., and J. Wahr, Methods of inferring regional surface-mass anomalies from Gravity Recovery and Climate Experiment (GRACE) measurements of time-variable gravity, J. Geophys. Res., 107(B9), 2193, doi:10.1029/2001jb000576, 2002. Conference Presentations June 2012: Modeling Cold-region Terrestrial Hydrological Processes in the Community Land Model, Community Earth System Model Meeting, Breckenridge, CO February 2012: A Gridded GRACE Total Water Storage Dataset for Hydrological Applications, AGU Chapman Conference on Remote Sensing of the Terrestrial Water Cycle, Kona, HI December 2011: An Improved Fractional Snow Covered Area Parameterization for the Community Land Model and its Effects on Simulated Climate, Fall American Geophysical Union Meeting, San Francisco, CA March 2011: Improved Cold Region Hydrological Processes for CLM, Land Model Working Group Meeting, Boulder, CO December 2010: Permafrost - Surface Water Interactions in the Community Land Model, Fall American Geophysical Union Meeting, San Francisco, CA June 2010: High-Latitude Hydrological Linkages between Surface Water, Frozen Soil, and Runoff in CLM4, Community Climate System Model Meeting, Breckenridge, CO December 2009: The role of wetlands in the hydrologic cycle of northern high latitude regions simulated using the Community Land Model, Fall American Geophysical Union Meeting, San Francisco, CA November 2009: Assessing High-Latitude Winter Precipitation using GRACE, GRACE Science Team Meeting, Austin, TX November 2009: A Note on Filtering & the University of Colorado GRACE Data Analysis Website, 2nd GRACE Hydrology Workshop, Austin, TX March 2009: Development of a Dynamic Surface Water Component in CLM4, Joint Land Model / Biogeochemistry Model Meeting, Boulder, CO December 2008: Assessing Human Impacts on the Water Balance of Lake Victoria Using GRACE and Altimeters, Fall American Geophysical Union Meeting, San Francisco, CA December 2008: Stripes, Constraints, and Rescaling, GRACE Science Team Meeting, San Francisco, CA June 2008: Improved Soil Moisture Variability in CLM 3.5, Community Climate System Model Meeting, Breckenridge, CO March 2007: Monitoring Human Impacts on the Water Cycle, Satellite Observations of the Global Water Cycle Meeting, Irvine, CA December 2006: GRACE Estimates of Terrestrial Water Storage: Validation and Applications, Fall American Geophysical Union Meeting, San Francisco, CA (Invited) December 2006: Estimating Regional Groundwater Variability in Oklahoma from a Combination of in situ and Remotely Sensed Observations, Fall American Geophysical Union Meeting, San Francisco, CA
December 2006: A Comparison of GRACE Estimates of Terrestrial Water Storage with in situ Observations in Illinois, GRACE Science Team Meeting, San Francisco, CA December 2005: Revealing GRACE s True Stripes: Post-processing Removal of Correlated Errors in GRACE Gravity Fields, Fall American Geophysical Union Meeting, San Francisco, CA (Invited) December 2005: A GRACE Assessment of the Seasonal Cycle of Total Water Storage from Several GCMs, Fall American Geophysical Union Meeting, San Francisco, CA October 2005: Assessing Macroscale Hydrologic and Atmospheric General Circulation Models with GRACE, GRACE Science Team Meeting, Austin, TX October 2005: Post-processing Removal of Correlated Errors in GRACE Gravity Fields, GRACE Science Team Meeting, Austin, TX April 2005: Regional Terrestrial Water Storage Estimated from GRACE Satellite Gravimetry and Macroscale Hydrologic Models, Spring European Geosciences Union Meeting, Vienna, Austria (Invited) December 2004: Water Storage Variations from GRACE: Results and Comparisons, Fall American Geophysical Union Meeting, San Francisco, CA (Invited) September 2004 Large-scale Water Storage Estimates from GRACE, GEWEX Americas Prediction Project (GAPP) 2004 PIs Meeting, Boulder, CO March 2004: Extracting Basin-scale Water Storage Variations from GRACE Time-variable Gravity, GRACE- Hydrology Meeting, Irvine, CA (Invited) December 2003: Measuring Large-Scale Changes in Water Storage from Space: First Results from GRACE, Fall American Geophysical Union Meeting, San Francisco, CA September 2003: A Technique for Recovering Terrestrial Water Storage from GRACE, Hydrology from Space Meeting, Toulouse, France December 2002: A Method for Retrieving Water Storage Variability from GRACE, Fall American Geophysical Union Meeting, San Francisco, CA December 2002: First Recoveries of Water Storage Changes from GRACE, Fall American Geophysical Union Meeting, San Francisco, CA December 2001: Large-Scale Hydrology Inferred from GRACE Estimates of Time-Variable Gravity, Fall American Geophysical Union Meeting, San Francisco, CA July 2000: Time-variable Gravity and Hydrology, IAG Gravity, Geoid and Geodynamics 2000 Meeting, Banff, Alberta, Canada May 1999: Estimated Effects of the Vertical Distribution of Atmosphere on the Time-variable Geoid, Spring American Geophysical Union Meeting, Boston, MA Awards and Fellowships 2011 American Geophysical Union Geodesy Section Award National Center for Atmospheric Research Advanced Study Program Postdoctoral Fellowship 2005 Editors s Citation for Excellence in Refereeing for Geophysical Research Letters NASA Earth Systems Science Fellowship, September 2000 - December 2002 Outstanding Student Paper Award, Geodesy Section, AGU Spring Meeting 1999 References Prof. John Wahr Campus Box 390 Department of Physics University of Colorado Boulder, CO 80309-0390 (303) 492-8349 (303) 492-7935 wahr@colorado.edu
Dr. David Lawrence P. O. Box 3000 National Center for Atmospheric Research Boulder, CO 80307 (303) 497-1384 (303) 497-1348 dlawren@ucar.edu Prof. Jay Famiglietti Earth System Science 3317 Croul Hall University of California, Irvine Irvine, CA 92697-3100 (949) 824-9434 (949) 824-3874 jfamigli@uci.edu