Forecasting secular variation using core flows

Earth, Planets and Space

Volumn 62, Issue 10, 2010, Pages 821-828

  Beggan, Ciarán ^a   Whaler, Kathy ^b  

^a BRITISH GEOLOGICAL SURVEY   (United Kingdom)

^b UNIVERSITY OF EDINBURGH   (United Kingdom)

Author keywords

Core flows; Forecasting; Magnetic field; Secular variation

Indexed keywords

DATA ASSIMILATION; ENSEMBLE FORECASTING; GROUND-BASED MEASUREMENT; KALMAN FILTER; MAGNETIC FIELD; SATELLITE DATA; SECULAR VARIATION;

EID: 79952093789     PISSN: 13438832     EISSN: 18805981     Source Type: Journal    
DOI: 10.5047/eps.2010.07.004     Document Type: Article

References (26)

1. Beggan, C. D. and K. Whaler, Forecasting change of the magnetic field using core surface flows and ensemble Kalman filtering, Geophys. Res. Lett., 36, L18303, 2009.
2. Chambodut, A., B. Langlais, and M. Mandea, Candidate main-field models for the Definitive Geomagnetic Reference Field 1995.0 and 2000.0, Earth Planets Space, 57, 1197-2002, 2005.
3. Evensen, G., Sequential data assimilation with a nonlinear quasigeostrophic model using Monte Carlo methods to forecast error statistics,/. Geophys. Res., 99, 10, 143-10,162, 1994.
4. Finlay, C. C., S. Maus, C. D. Beggan, M. Hamoudi, F. J. Lowes, N. Olsen, and E. Thébault, Evaluation of candidate geomagnetic field models for IGRF-11, Earth Planets Space, 62, this issue, 787-804, 2010.
5. Fournier, A., C. Eymin, and T. Alboussiere, A case for variational geomagnetic data assimilation: insights from a one-dimensional, nonlinear, and sparsely observed MHD system, Nonlin. Proc. Geophys., 14, 163-180, 2007. (Pubitemid 46659201)
6. Gillet, N., A. Pais, and D. Jault, Ensemble inversion of time-dependent core flow models, Geochem. Geophys. Geosyst., 10, Q06004, 2009.
7. Gubbins, D., Geomagnetic field analysis-II. Secular variation consistent with a perfectly conducting core, Geophys. J. R. Astron. Soc., 77, 753-766, 1984.
8. Halley, E., On the cause of the change in the variation of the magnetic needle; with an hypothesis of the structure of the internal parts of the Earth, Phil. Trans. R. Soc. Lond., 17, 470-478, 1692.
9. Hills, R., Convection in the Earth's mantle due to viscous shear at the coremantle interface and due to large-scale bouyancy, Ph.D. thesis, N. M. State Univ., Las Cruces, 1979.
10. Holme, R., Large scale flow in the core, in Treatise on Geophysics, Vol. 8, 107-130, Elsevier, 2007.
11. Kalman, R., A new approach to linear filtering and prediction problems, Trans. ASME J. Basic Eng., 82, 35-45, 1960.
12. Kuang, W., A. Tangborn, Z. Wei, and T. Sabaka, Constraining a numerical geodynamo model with 100 years of surface observations, Geophys. J. Int., 179, 1458-1468, 2009.
13. Le Mouël, J.-L., Outer-core geostrophic flow and secular variation of Earth's geomagnetic field, Nature, 311, 734-735, 1984.
14. Lowes, F. J., An estimate of the errors of the IGRF/DGRF fields 1945-2000, Earth Planets Space, 52, 1207-1211, 2000.
15. Macmillan, S. and S. Maus, International Geomagnetic Reference Fieldthe tenth generation, Earth Planets Space, 57, 1135-1140, 2005.
16. Mandea, M. and N. Olsen, A new approach to directly determine the secular variation from magnetic satellite observations, Geophys. Res. Lett., 33, L15306, 2006.
17. Maus, S., S. Macmillan, F. Lowes, and T. Bondar, Evaluation of candidate geomagnetic field models for the 10th generation of IGRF, Earth Planets Space, 57, 1173-1181, 2005.
18. Maus, S., M. Rother, C. Stolle, W. Mai, S. Choi, H. Lühr, D. Cooke, and C. Roth, Third generation of the Potsdam Magnetic Model of the Earth (POMME), Geochem. Geophys. Geosyst., 7, Q07008, 2006.
19. Maus, S., L. Silva, and G. Hulot, Can core-surface flow models be used to improve the forecast of the Earth's main magnetic field?, J. Geophys. Res., 113, B08102, 2008.
20. Olsen, N. and M. Mandea, Investigation of a secular variation impulse using satellite data: the 2003 geomagnetic jerk, Earth Planet. Sci. Lett., 255, 94-105, 2007.
21. Olsen, N., H. Lühr, T. Sabaka, M. Mandea, M. Rother, and L. ToffnerClausen, CHAOS: a model of the Earth's magnetic field derived from CHAMP, Oersted, and SAC-C magnetic satellite data, Geophys. J. Int., 166, 67-75, 2006. (Pubitemid 43984352)
22. Olsen, N., M. Mandea, T. J. Sabaka, and L. Toffner-Clausen, CHAOS2-a geomagnetic field model derived from one decade of continuous satellite data, Geophys. J. Int., 179, 1477-1487, 2009.
23. Roberts, P. and S. Scott, On the analysis of the secular variation. 1. A hydromagnetic constraint: Theory, J. Geomag. Geoelectr., 17, 137-151, 1965.
24. Sun, Z., A. Tangborn, and W. Kuang, Data assimilation in a sparsely observed one-dimensional modeled MHD system, Nonlin. Proc. Geophys., 14, 181-192, 2007. (Pubitemid 46751594)
25. Wardinski, I., R. Holme, S. Asari, and M. Mandea, The 2003 geomagnetic jerk and its relation to the core surface flows, Earth Planet. Sci. Lett., 267, 468-481, 2008.
26. Whaler, K., Geomagnetic evidence for fluid upwelling at the core-mantle boundary, Geophys. J. R. Astron. Soc., 86, 563-588, 1986.