Browse > Article
http://dx.doi.org/10.7780/kjrs.2005.21.1.51

Spaceborne Gravity Sensors for Continental Hydrology and Geodynamic Studies  

Shum C. K. (Laboratory for Space Geodesy and Remote Sensing, Ohio State University)
Han Shin-Chan (Laboratory for Space Geodesy and Remote Sensing, Ohio State University)
Braun Alexander (Department of Geomatics Engineering, University of Calgary)
Publication Information
Korean Journal of Remote Sensing / v.21, no.1, 2005 , pp. 51-57 More about this Journal
Abstract
The currently operating NASA/GFZ Gravity Recovery and Climate Experiment (GRACE) mission is designed to measure small mass changes over a large spatial scale, including the mapping of continental water storage changes and other geophysical signals in the form of monthly temporal gravity field. The European Space Agency's Gravity field and steady state Ocean Circulation Explorer (GOCE) space gravity gradiometer (SGG) mission is anticipated to determine the mean Earth gravity field with an unprecedented geoid accuracy of several cm (rms) with wavelength of 130km or longer. In this paper, we present a summary of present GRACE studies for the recovery of hydrological signals in the Amazon basin using alternative processing and filtering techniques, and local inversion to enhance the temporal and spatial resolutions by two-folds or better. Simulation studies for the potential GRACE detection of slow deformations due to Nazca-South America plate convergence and glacial isostatic adjustment (GIA) signals show that these signals are at present difficult to detect without long-term data averaging and further improvement of GRACE measurement accuracy.
Keywords
Gravity; Temporal Gravity; Hydrology; Geodynamics; Plate Convergence; Earthquakes; Glacial Isostatic Adjustment.;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Han, S., C. Shum, and A. Braun, 2005a. High- Resolution Continental Water Storage Recovery from Low-Low Satellite-to-Satellite Tracking, J. Geodynamics, 39(1): 11-28   DOI   ScienceOn
2 Ramillien, G., A. Cazenave and O. Brunau, 2004. global timem variations of hydrological signals from GRACE satellite gravimetry, Geophys. J. Int., 158: 813-826, doi: 10.1111/j.1365-246X. 2004.02328.x   DOI   ScienceOn
3 Rodell, M., and J. Famiglietti, 1999. Detectibility of Variations in Continental Water Storage from Satellite Observations of the Time-variable Gravity Field, Wat. Resour. Res., 35(9): 2705- 2723   DOI
4 Shum, C. S. Han, C. Kuo, K. Seo and C. Wilson, 2004. Assessment of GRACE time-variable gravity observables: A new filtering technique to enhance signal spatial resolutions, Eos Trans. AGU, 85(47), Fall Meet. Suppl.,Abstract G31C- 0814, San Francisco, December 13-17
5 Tapley, B. D., S. Bettadpur, M. Watkins, and Ch. Reigber, 2004a. The Gravity Recovery and Climate Experiment; Mission Overview and Early Results, Geophys. Res. Lett., 31(9), 10.1029/2004GL019920
6 Wahr, J., S. Swenson, V. Zlotnicki, and I. Velicogna, 2004. Time-variable gravity from GRACE: First results, Geophys. Res. Lett., 31, L11501, doi:10.1029/2004GL019779   DOI   ScienceOn
7 Han, S-C., 2004. The efficient determination of global gravity field from satellite-to-satellite tracking mission, Celestial Mechanics and Dynamical Astronomy, 88: 69-102
8 Wahr, J., M. Molenaar, and F. Bryan, 1998. Time variability of the Earth's gravity field: hydrological and oceanic effects and their possible detection using GRACE, J. Geophys. Res., 103: 30205-30229   DOI
9 Tapley, B. D., S. Bettadpur, J. Ries, P. Thompson, and M. Watkins, 2004b. GRACE Measurements of Mass Variability in the Earth System, Science, 305: 503-505   DOI   PUBMED   ScienceOn
10 ESA, 1999. Gravity Field and Steady-State Ocean Circulation Mission, Rep. SP-1233, European Space Agency, Noordwijk
11 Han, S., C. Shum, P. Ditmar, P. Visser, C. van Beelen, and E. Schrama, 2005b. Effect of highfrequency mass variations on GOCE recovery of the Earth's gravity field, in review, J. Geodynamics
12 Han, S., C. Shum, D. Alsdorf, K. Seo, and C. Wilson, 2004b. High-resolution recovery and validation of GRACE hydrological signals, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract C22C-01, San Francisco, December 13-17
13 Kim, J., P. Roesset, S. Bettadpur, B. Tapley, and M. Watkins, 2001. Error analysis of the Gravity Recovery and Climate Experiment (GRACE), IAG Symposium Series, M. Sideris (eds), 123, 103-108, Springer-Verlag Berlin Heidelberg
14 Bettadpur, S., and M. Watkins, 2000. GRACE gravity science & its impact on mission design, EOS Trans AGU, May 2000
15 Lemoine, F., D. Smith, L. Kunz, R. Smith, E. Pavlis, N. Pavlis, S. Klosko, D. Chinn, M. Torrence, R. Williamson, C. Cox, K. Rachlin, Y. Wang, S. Kenyon, R. Salman, R. Trimmer, R. Rapp, and R. Nerem, 1997. The development of the NASA GSFC and NIMA joint geopotential model, International Association of Geodesy Symposium No. 117, Tokyo, Japan, September 30-October 5, 1996, J. Segawa, H. Fujimoto, and S. Okubo, Editors, 461-469, Springer
16 Schmidt, M., O. Fabert and C. Shum, 2004. Towards the estimation of a multi-resolution gravity field representation based on spherical harmonics and wavelets, IAG Springer Symposia, in-press
17 Shum, C., S. Han, C. Kuo, L. Potts, A. Braun, M. Schmidt, and M. Lai, 2005. Study of potential GRACE detection of solid Earth slow deformations, submitted, Advances in Geosciences
18 Davis, A., C. Dunn, R. Stanton, and J. Thomas, 1999. The GRACE mission: meeting the technical challenges, 50th International Astronautical Congress, October 4-8, 1999, Amsterdam, Netherlands
19 Han, S., C. Jekeli, and C. Shum, 2004a. Time-variable aliasing effects of ocean tides, atmosphere, and continental water mass on monthly mean GRACE gravity field, J. Geophys. Res., 109(B4), B04403, 10.1029/2003JB002501   DOI
20 Schrama, E., 2003. Error characteristics estimated from CHAMP, GRACE and GOCE derived geoids and from satellite altimetry derived mean dynamic topography, Earth Gravity Field from Space, Kluwer Space Sciences Reviews Journal (Beutler, Drinkwater, Rummel and Steiger, Editors)