Abstract
We have analyzed intersatellite data from the GRACE mission (Gravity Recovery and Climate Experiment) to resolve time-variable gravity using a local mascon approach. The spherical harmonic solutions have resolved the signal from surface hydrology over land areas at spatial scales of 750 to 1000 km over one month intervals (Wahr et al., 2004; Tapley et al., 2004a). In our local approach, we solve explicitly for the mass of water in surface blocks using only the intersatellite data collected as the GRACE spacecraft overfly the region of interest. The local representation of gravity minimizes leakage of errors from other areas due to aliasing or mismodelling. We review solutions for mascons from July 2003 to August 2004 over three regions: the Amazon, the Indian subcontinent, and the continental United States. We solve for mass change at 10-day intervals using 4° × 4° blocks using a temporal and spatial constraint. The mascon solutions clearly resolve the annual signal over all three regions and show evidence of shorter period variations in parts of the continental U.S.
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References
Bertiger, W., Y. Bar-Sever, S. Bettadpur, S. Desai, C. Dunn, B. Haines, G. Kruizinga, D. Kuang, S. Nandi, L. Romans, M. Watkins, and S. Wu (2002), GRACE: Millimeters and microns in orbit, Proceedings of ION GPS 2002, Portland, Oregon, September 24–27, 2002, pp. 2022–2029.
Chao, B.F, W.P. O’Connor, A.T.C. Chang, D.K. Hall, and J. L. Foster, (1987), Snow load effects on the Earth’s rotation and gravitational field, 1979–1985, Journal of Geophysical Research, 92(B9), pp. 9415–9422.
Chao, B.F, and A. Au, (1991), Temporal variation of the Earth’s low-degree field caused by atmospheric mass distribution-1980–1988, Journal of Geophysical Research, 96(B4), pp. 6569–6575.
Han, S-C., C. Jekeli, and C.K. Shum, (2004), Time-variable aliasing effects of ocean tides, atmosphere, and continental water mass on monthly mean GRACE gravity field, Journal of Geophysical Research, 109, doi: 10.1029/2003JB002501.
Luthcke, S.B., N.P. Zelensky, D.D. Rowlands, F.G. Lemoine, and T.A. Williams (2003), The 1-cm orbit: Jason-1 precision orbit determination using GPS, SLR, DORIS, and altimeter data, Marine Geodesy, 26(3–4), pp. 399–421.
Mueller, P.M. and W.L. Sjogren (1968), Mascons-lunarmass concentrations, Science, 161, pp. 680.
Petrov, L. (2005), Personal communication, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.
Ray R.D., D.D. Rowlands, and G. Egbert (2003), Tide models in a new era of satellite altimetry, Space Science Reviews, 108, pp. 271–282.
Rowlands, D.D., R.D. Ray, D.S. Chinn and F.G. Lemoine, (2002), Short-arc analysis of intersatellite tracking data in a mapping mission, Journal of Geodesy, 76(6-1), pp. 307–316.
Rowlands, D.D., S.B. Luthcke, S.M. Klosko, F.G. Lemoine, D.S. Chinn, J.J. McCarthy, C.M. Cox, and O. A. Andersen (2005), Resolving mass flux at high spatial and temporal resolution using GRACE intersatellite measurements, Geophysical Research Letters, 32, L04310, doi: 10.1029/2004GL021908.
Tapley, B.D., S. Bettadpur, J. Ries, P. Thompson, and M. Watkins, (2004a), GRACE measurements of mass variability in the Earth system, Science 305(5683), pp. 503–505.
Tapley, B.D., S. Bettadpur, M. Watkins, C. Reigber (2004b), the Gravity Recovery and Climate Experiment, Mission overview and early results, Geophysical Research Letters, 31(9), L09607, doi: 10.1029/2004GL021908.
Tapley, B.D., J. Ries, S. Bettadpur, D. Chambers, M. Cheng, F. Condi, B. Gunter, Z. Kang, P. Nagel, R. Pastor, T. Pekker, S. Poole, and F. Wang (2005), GGM02 — An improved Earth gravity field model from GRACE, Journal of Geodesy, 79(8), pp. 467–478.
Thompson, P.F., S.V. Bettadpur, and B.D. Tapley, (2004), Impact of short period, non-tidal mass variability on GRACE gravity estimates, Geophysical Research. Letters 31, L06619, doi: 10.1029,2003GL019285
Wahr, J., S. Swenson, V. Zlotnicki, and I. Velicogna, (2004), Time-variable gravity from GRACE: First results, Geophysical Research Letters, 31(11), L1150110, doi:10.1029/2004GL019779.
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Lemoine, F.G., Luthcke, S.B., Rowlands, D.D., Chinn, D.S., Klosko, S.M., Cox, C.M. (2007). The use of mascons to resolve time-variable gravity from GRACE. In: Tregoning, P., Rizos, C. (eds) Dynamic Planet. International Association of Geodesy Symposia, vol 130. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49350-1_35
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DOI: https://doi.org/10.1007/978-3-540-49350-1_35
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