WAHR, JOHN / علوم الأرض / الباحثون

المركز الدولي للبحث العلمي

الباحثون

علوم الأرض / WAHR, JOHN

wahrlemond.colorado.edu

الموضع

Professor, Physics
Department of Physics, University of Colorado Boulder, USA.

مواضيع البحث

Theoretical geophysics; earth rotation; earth and ocean tides; earth/ocean and earth/atmosphere interactions; terrestrial normal modes; crustal deformation.

Current Research: Applications of Time-Variable Gravity Measurements from GRACE

The Gravity Recovery and Climate Experiment (GRACE) satellite mission, launched by NASA and the German Space Agency in March 2002, is providing global maps of the Earth’s gravity field to astonishing accuracy every month. Because the Earth’s gravity field is caused by its mass distribution, time-variations in gravity as determined from GRACE data can be used to estimate monthto- month changes in the Earth’s mass distribution. GRACE can recover mass variability at scales of about 250-300 km and larger.

الجوائز

Charles A. Whitten Medal of the American Geophysical Union (2006)
Vening Meinesz Medal of the European Geosciences Union (2004)
Vening Meinesz Medal from Utrecht and Delft Universities in The Netherlands (1998)
James B. Macelwane Award of the American Geophysical Union (1985)
Fellow of the American Geophysical Union (1985)
Guy Bomford Prize for Geodetic Researchfrom the International Association of Geodesy and London’s Royal Society (1983)

المنشورات

Swenson, S; Wahr, J (2009), Monitoring the water balance of Lake Victoria, East Africa, from space. J. Hydrol., 370 (4-Jan) 163-176, issn: 0022-1694, ids: 453WY, doi: 10.1016/j.jhydrol.2009.03.008, Published 30-May 2009

Tiwari, VM; Wahr, J; Swenson, S (2009), Dwindling groundwater resources in northern India, from satellite gravity observations. Geophys. Res. Lett., 36 , Art. No. L18401, issn: 0094-8276, ids: 497JH, doi: 10.1029/2009GL039401, Published 17-Sep 2009

Wahr, J; Selvans, ZA; Mullen, ME; Barr, AC; Collins, GC; Selvans, MM; Pappalardo, RT (2009), Modeling stresses on satellites due to nonsynchronous rotation and orbital eccentricity using gravitational potential theory. Icarus, 200 (1) 188-206, issn: 0019-1035, ids: 419IN, doi: 10.1016/j.icarus.2008.11.002, Published MAR 2009

Khan, SA; Wahr, J; Leuliette, E; van Dam, T; Larson, KM; Francis, O (2008), Geodetic measurements of postglacial adjustments in Greenland. J. Geophys. Res.-Solid Earth, 113 (B2) , Art. No. B02402, issn: 0148-0227, ids: 263SI, doi: 10.1029/2007JB004956, Published 14-Feb 2008

Ramillien, G; Famiglietti, JS; Wahr, J (2008), Detection of Continental Hydrology and Glaciology Signals from GRACE: A Review. Surv. Geophys., 29 (5-Apr) 361-374, issn: 0169-3298, ids: 403EJ, doi: 10.1007/s10712-008-9048-9, Published OCT 2008

Rappaport, NJ; Iess, L; Wahr, J; Lunine, JI; Armstrong, JW; Asmar, SW; Tortora, P; Di Benedetto, M; Racioppa, P (2008), Can Cassini detect a subsurface ocean in Titan from gravity measurements?. Icarus, 194 (2) 711-720, issn: 0019-1035, ids: 284DM, doi: 10.1016/j.icarus.2007.11.024, Published APR 2008

Swenson, S; Chambers, D; Wahr, J (2008), Estimating geocenter variations from a combination of GRACE and ocean model output. J. Geophys. Res.-Solid Earth, 113 (B8) , Art. No. B08410, issn: 0148-0227, ids: 340MB, doi: 10.1029/2007JB005338, Published 19-Aug 2008

Swenson, S; Famiglietti, J; Basara, J; Wahr, J (2008), Estimating profile soil moisture and groundwater variations using GRACE and Oklahoma Mesonet soil moisture data. Water Resour. Res., 44 (1) , Art. No. W01413, issn: 0043-1397, ids: 251JM, doi: 10.1029/2007WR006057, Published 10-Jan 2008

Ashby, N; Bender, PL; Wahr, JM (2007), Future gravitational physics tests from ranging to the BepiColombo Mercury planetary orbiter. Phys. Rev. D, 75 (2) , Art. No. 22001, issn: 1550-7998, ids: 131UQ, doi: 10.1103/PhysRevD.75.022001, Published JAN 2007

Furuya, M; Mueller, K; Wahr, J (2007), Active salt tectonics in the Needles District, Canyonlands (Utah) as detected by interferometric synthetic aperture radar and point target analysis: 1992-2002. J. Geophys. Res.-Solid Earth, 112 (B6) , Art. No. B06418, issn: 0148-0227, ids: 185DK, doi: 10.1029/2006JB004302, Published 26-Jun 2007

Khan, SA; Wahr, J; Stearns, LA; Hamilton, GS; van Dam, T; Larson, KM; Francis, O (2007), Elastic uplift in southeast Greenland due to rapid ice mass loss. Geophys. Res. Lett., 34 (21) , Art. No. L21701, issn: 0094-8276, ids: 228CA, doi: 10.1029/2007GL031468, Published 1-Nov 2007

Matrosov, SY; Clark, KA; Kingsmill, DE (2007), A polarimetric radar approach to identify rain, melting-layer, and snow regions for applying corrections to vertical profiles of reflectivity. J. Appl. Meteor. Clim., 46 (2) 154-166, issn: 1558-8424, ids: 141LZ, doi: 10.1175/JAM2508.1, Published FEB 2007

Morison, J; Wahr, J; Kwok, R; Peralta-Ferriz, C (2007), Recent trends in Arctic Ocean mass distribution revealed by GRACE. Geophys. Res. Lett., 34 (7) , Art. No. L07602, issn: 0094-8276, ids: 155LI, doi: 10.1029/2006GL029016, Published 4-Apr 2007

Paulson, A; Zhong, SJ; Wahr, J (2007), Inference of mantle viscosity from GRACE and relative sea level data. Geophys. J. Int., 171 (2) 497-508, issn: 0956-540X, ids: 220GR, doi: 10.1111/j.1365-246X.2007.03556.x, Published NOV 2007

Paulson, A; Zhong, SJ; Wahr, J (2007), Limitations on the inversion for mantle viscosity from postglacial rebound. Geophys. J. Int., 168 (3) 1195-1209, issn: 0956-540X, ids: 141VK, doi: 10.1111/j.1365-246X.2006.03222.x, Published MAR 2007

Swenson, S; Wahr, J (2007), Multi-sensor analysis of water storage variations of the Caspian Sea. Geophys. Res. Lett., 34 (16) , Art. No. L16401, issn: 0094-8276, ids: 202JB, doi: 10.1029/2007GL030733, Published 17-Aug 2007

van Dam, T; Wahr, J; Lavallee, D (2007), A comparison of annual vertical crustal displacements from GPS and Gravity Recovery and Climate Experiment (GRACE) over Europe. J. Geophys. Res.-Solid Earth, 112 (B3) , Art. No. B03404, issn: 0148-0227, ids: 147SH, doi: 10.1029/2006JB004335, Published 13-Mar 2007

Zlotnicki, V; Wahr, J; Fukumori, I; Song, YT (2007), Antarctic circumpolar current transport variability during 2003-05 from GRACE. J. Phys. Oceanogr., 37 (2) 230-244, issn: 0022-3670, ids: 141DP, doi: 10.1175/JPO3009.1, Published FEB 2007

Benjamin, D; Wahr, J; Ray, RD; Egbert, GD; Desai, SD (2006), Constraints on mantle anelasticity from geodetic observations, and implications for the J(2) anomaly. Geophys. J. Int., 165 (1) 3-16, issn: 0956-540X, ids: 072RA, doi: 10.1111/j.1365-246X.2006.02915.x, Published APR 2006

Mitrovica, JX; Wahr, J; Matsuyama, I; Paulson, A; Tamisiea, ME (2006), Reanalysis of ancient eclipse, astronomic and geodetic data: A possible route to resolving the enigma of global sea-level rise. Earth Planet. Sci. Lett., 243 (4-Mar) 390-399, issn: 0012-821X, ids: 029YP, doi: 10.1016/j.epsl.2005.12.029, Published 30-Mar 2006

Swenson, S; Wahr, J (2006), Estimating large-scale precipitation minus evapotranspiration from GRACE satellite gravity measurements. J. Hydrometeorol., 7 (2) 252-270, issn: 1525-755X, ids: 040OF, Published APR 2006

Swenson, S; Wahr, J (2006), Post-processing removal of correlated errors in GRACE data. Geophys. Res. Lett., 33 (8) , Art. No. L08402, issn: 0094-8276, ids: 040WK, doi: 10.1029/2005GL025285, Published 25-Apr 2006

Swenson, S; Yeh, PJF; Wahr, J; Famiglietti, J (2006), A comparison of terrestrial water storage variations from GRACE with in situ measurements from Illinois. Geophys. Res. Lett., 33 (16) , Art. No. L16401, issn: 0094-8276, ids: 076XK, doi: 10.1029/2006GL026962, Published 16-Aug 2006

Velicogna, I; Wahr, J (2006), Acceleration of Greenland ice mass loss in spring 2004. Nature, 443 (7109) 329-331, issn: 0028-0836, ids: 085RL, doi: 10.1038/nature05168, Published 21-Sep 2006

Velicogna, I; Wahr, J (2006), Measurements of time-variable gravity show mass loss in Antarctica. Science, 311 (5768) 1754-1756, issn: 0036-8075, ids: 024OA, doi: 10.1126/science.1123785, Published 24-Mar 2006

Wahr, J; Swenson, S; Velicogna, I (2006), Accuracy of GRACE mass estimates. Geophys. Res. Lett., 33 (6) , Art. No. L06401, issn: 0094-8276, ids: 026HY, doi: 10.1029/2005GL025305, Published 18-Mar 2006

Wahr, JM; Zuber, MT; Smith, DE; Lunine, JI (2006), Tides on Europa, and the thickness of Europa's icy shell. J. Geophys. Res.-Planets, 111 (E12) , Art. No. E12005, issn: 0148-0227, ids: 115TI, doi: 10.1029/2006JE002729, Published 8-Dec 2006

Clarke, PJ; Lavallee, DA; Blewitt, G; van Dam, TM; Wahr, JM (2005), Effect of gravitational consistency and mass conservation on seasonal surface mass loading models. Geophys. Res. Lett., 32 (8) , Art. No. L08306, issn: 0094-8276, ids: 922PT, doi: 10.1029/2005GL022441, Published 19-Apr 2005

Furuya, M; Wahr, JM (2005), Water level changes at an ice-dammed lake in west Greenland inferred from InSAR data. Geophys. Res. Lett., 32 (14) , Art. No. L14501, issn: 0094-8276, ids: 950BZ, doi: 10.1029/2005GL023458, Published 16-Jul 2005

Mitrovica, JX; Wahr, J; Matsuyama, I; Paulson, A (2005), The rotational stability of an ice-age earth. Geophys. J. Int., 161 (2) 491-506, issn: 0956-540X, ids: 921DR, doi: 10.1111/j.1365-246X.2005.02609.x, Published MAY 2005

Paulson, A; Zhong, SJ; Wahr, J (2005), Modelling post-glacial rebound with lateral viscosity variations. Geophys. J. Int., 163 (1) 357-371, issn: 0956-540X, ids: 964EL, doi: 10.1111/j.1365-246X.2005.02645.x, Published OCT 2005

Velicogna, I; Wahr, J (2005), Greenland mass balance from GRACE. Geophys. Res. Lett., 32 (18) , Art. No. L18505, issn: 0094-8276, ids: 971PA, doi: 10.1029/2005GL023955, Published 30-Sep 2005

Velicogna, I; Wahr, J; Hanna, E; Huybrechts, P (2005), Short term mass variability in Greenland, from GRACE. Geophys. Res. Lett., 32 (5) , Art. No. L05501, issn: 0094-8276, ids: 905DL, doi: 10.1029/GL021948, Published 1-Mar 2005

Chambers, DP; Wahr, J; Nerem, RS (2004), Preliminary observations of global ocean mass variations with GRACE. Geophys. Res. Lett., 31 (13) , Art. No. L13310, issn: 0094-8276, ids: 839PK, doi: 10.1029/2004GL020461, Published 14-Jul 2004

Wahr, J; Swenson, S; Zlotnicki, V; Velicogna, I (2004), Time-variable gravity from GRACE: First results. Geophys. Res. Lett., 31 (11) , Art. No. L11501, issn: 0094-8276, ids: 829XJ, doi: 10.1029/2004GL019779, Published 9-Jun 2004

Bender, PL; Nerem, RS; Wahr, JM (2003), Possible future use of laser gravity gradiometers. Space Sci. Rev., 108 (2-Jan) 385-392, issn: 0038-6308, ids: 732AM

Jayne, SR; Wahr, JM; Bryan, FO (2003), Observing ocean heat content using satellite gravity and altimetry. J. Geophys. Res.-Oceans, 108 (C2) , Art. No. 3031, issn: 0148-0227, ids: 662GN, doi: 10.1029/2002JC001619, Published 13-Feb 2003

Nerem, RS; Wahr, JM; Leuliette, EW (2003), Measuring the distribution of ocean mass using GRACE. Space Sci. Rev., 108 (2-Jan) 331-344, issn: 0038-6308, ids: 732AM

Swenson, S; Wahr, J (2003), Monitoring changes in continental water storage with GRACE. Space Sci. Rev., 108 (2-Jan) 345-354, issn: 0038-6308, ids: 732AM

Swenson, S; Wahr, J; Milly, PCD (2003), Estimated accuracies of regional water storage variations inferred from the Gravity Recovery and Climate Experiment (GRACE). Water Resour. Res., 39 (8) , Art. No. 1223, issn: 0043-1397, ids: 720HJ, doi: 10.1029/2002WR001808, Published 28-Aug 2003

Wahr, J; Velicogna, I (2003), What might GRACE contribute to studies of post glacial rebound?. Space Sci. Rev., 108 (2-Jan) 319-330, issn: 0038-6308, ids: 732AM

Zhong, SJ; Paulson, A; Wahr, J (2003), Three-dimensional finite-element modelling of Earth's viscoelastic deformation: effects of lateral variations in lithospheric thickness. Geophys. J. Int., 155 (2) 679-695, issn: 0956-540X, ids: 736MA, Published NOV 2003

Meier, MF; Wahr, JM (2002), Sea level is rising: Do we know why?. Proc. Natl. Acad. Sci. U. S. A., 99 (10) 6524-6526, issn: 0027-8424, ids: 552TZ, Published 14-May 2002

Swenson, S; Wahr, J (2002), Methods for inferring regional surface-mass anomalies from Gravity Recovery and Climate Experiment (GRACE) measurements of time-variable gravity. J. Geophys. Res.-Solid Earth, 107 (B9) , Art. No. 2193, issn: 0148-0227, ids: 634WU, doi: 10.1029/2001JB000576, Published SEP 2002

Swenson, S; Wahr, J (2002), Estimated effects of the vertical structure of atmospheric mass on the time-variable geoid. J. Geophys. Res.-Solid Earth, 107 (B9) , Art. No. 2194, issn: 0148-0227, ids: 634WU, doi: 10.1029/2000JB000024, Published SEP 2002

Tamisiea, ME; Wahr, JM (2002), Phase transitions and short timescale sinusoidal motions. Earth Planet. Sci. Lett., 198 (4-Mar) 459-470, issn: 0012-821X, ids: 555RX, Published 15-May 2002

Tamisiea, ME; Wahr, JM (2002), Phase transitions and heat conduction in post-glacial rebound. Geophys. J. Int., 149 (2) 422-439, issn: 0956-540X, ids: 549JT, Published MAY 2002

Velicogna, I; Wahr, J (2002), Postglacial rebound and Earth's viscosity structure from GRACE. J. Geophys. Res.-Solid Earth, 107 (B12) , Art. No. 2376, issn: 0148-0227, ids: 649VF, doi: 10.1029/2001JB001735, Published 28-Dec 2002

Velicogna, I; Wahr, J (2002), A method for separating antarctic postglacial rebound and ice mass balance using future ICESat Geoscience Laser Altimeter System, Gravity Recovery and Climate Experiment, and GPS satellite data. J. Geophys. Res.-Solid Earth, 107 (B10) , Art. No. 2263, issn: 0148-0227, ids: 637RC, doi: 10.1029/2001JB000708, Published OCT 2002

Wahr, JM; Jayne, SR; Bryan, FO (2002), A method of inferring changes in deep ocean currents from satellite measurements of time-variable gravity. J. Geophys. Res.-Oceans, 107 (C12) , Art. No. 3218, issn: 0148-0227, ids: 649WV, doi: 10.1029/2001JC001274, Published 19-Dec 2002

Wu, XP; Watkins, MM; Ivins, ER; Kwok, R; Wang, P; Wahr, JM (2002), Toward global inverse solutions for current and past ice mass variations: Contribution of secular satellite gravity and topography change measurements. J. Geophys. Res.-Solid Earth, 107 (B11) , Art. No. 2291, issn: 0148-0227, ids: 637RR, doi: 10.1029/2001JB000543, Published NOV 2002

van Dam, T; Wahr, J; Milly, PCD; Shmakin, AB; Blewitt, G; Lavallee, D; Larson, KM (2001), Crustal displacements due to continental water loading. Geophys. Res. Lett., 28 (4) 651-654, issn: 0094-8276, ids: 401MX, Published 15-Feb 2001

Velicogna, I; Wahr, J; Van den Dool, H (2001), Can surface pressure be used to remove atmospheric contributions from GRACE data with sufficient accuracy to recover hydrological signals?. J. Geophys. Res.-Solid Earth, 106 (B8) 16415-16434, issn: 0148-0227, ids: 461LF, Published 10-Aug 2001

Wahr, J; van Dam, T; Larson, K; Francis, O (2001), GPS measurements of vertical crustal motion in Greenland. J. Geophys. Res.-Atmos., 106 (D24) 33755-33759, issn: 0747-7309, ids: 522DE, Published 27-Dec 2001

Wahr, J; van Dam, T; Larson, K; Francis, O (2001), Geodetic measurements in Greenland and their implications. J. Geophys. Res.-Solid Earth, 106 (B8) 16567-16581, issn: 0148-0227, ids: 461LF, Published 10-Aug 2001

Tierney, C; Wahr, J; Bryan, F; Zlotnicki, V (2000), Short-period oceanic circulation: implications for satellite altimetry. Geophys. Res. Lett., 27 (9) 1255-1258, issn: 0094-8276, ids: 309BX, Published 1-May 2000

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