Latitude dependency of the geomagnetic secular variation S parameter: A mathematical artifact

Geophysical Research Letters

Volumn 39, Issue 2, 2012, Pages

  Linder, Julia ^a   Gilder, Stuart A ^a  

^a UNIVERSITY OF MUNICH   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

MAGNETIC FIELDS;

ANGULAR DISTANCE; EARTH'S MAGNETIC FIELD; ENERGY STATE; GEODYNAMO; GEOMAGNETIC FIELDS; GEOMAGNETIC SECULAR VARIATION; NON-DIPOLE; PALEOMAGNETISTS; PALEOSECULAR VARIATIONS; S -PARAMETERS; SECULAR VARIATION; STANDARD DEVIATION; TIME VARYING;

GEOMAGNETISM;

ARTIFACT; GEODYNAMO; GEOMAGNETIC FIELD; LATITUDE; MAGNETIC FIELD; PALEOMAGNETISM; SECULAR VARIATION;

EID: 84856465410     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2011GL050330     Document Type: Article

References (30)

1. Baag, C. G., and C. E. Helsley (1974), Geomagnetic secular variation Model E, J. Geophys. Res., 79, 4918-4922, doi:10.1029/JB079i032p04918.
2. Biggin, A. J., G. H. M. A. Strik, and C. G. Langereis (2008a), Evidence for a very-long-term trend in geomagnetic secular variation, Nat. Geosci., 1, 395-398, doi:10.1038/ngeo181.
3. Biggin, A. J., D. J. J. van Hinsbergen, C. G. Langereis, G. B. Straathof, and M. H. L. Deenen (2008b), Geomagnetic secular variation in the Cretaceous Normal Superchron and in the Jurassic, Phys. Earth Planet. Inter., 169, 3-19, doi:10.1016/j.pepi.2008.07.004.
4. Bloxham, J., and D. Gubbins (1985), The secular variation of Earth's magnetic field, Nature, 317, 777-781, doi:10.1038/317777a0.
5. Brock, A. (1971), An experimental study of palaeosecular variation, Geo-phys. J. R. Astron. Soc., 24, 303-317.
6. Calvo-Rathert, M., A. Goguitchaichvili, M.-F. Bógalo, N. Vegas-Tubía, Á. Carrancho, and J. Sologashvili (2011), A paleomagnetic and paleointen-sity study on Pleistocene and Pliocene basaltic flows from the Djavakheti Highland (Southern Georgia, Caucasus), Phys. Earth Planet. Inter., 187, 212-224, doi:10.1016/j.pepi.2011.03.008.
7. Chulliat, A., and K. Telali (2007), World monthly means database project, Publ. Inst. Geophys. Pol. Acad. Sci., C-99, 268-274.
8. Constable, C. G., and C. L. Johnson (1999), Anisotropic paleosecular variation models: Implications for geomagnetic field observables, Phys. Earth Planet. Inter., 115, 35-51, doi:10.1016/S0031-9201(99)00065-5. (Pubitemid 29515108)
9. Constable, C. G., and R. L. Parker (1988), Statistics of the geomagnetic secular variation for the past 5 My, J. Geophys. Res., 93, 11,569-11,581, doi:10.1029/JB093iB10p11569.
10. Cox, A. (1962), Analysis of present geomagnetic field for comparison with paleomagnetic results, J. Geomagn. Geoelectr., 13, 101-112, doi:10.5636/jgg.13.101.
11. Cox, A. (1969), Confidence limits for the precision parameter k, Geophys. J. R. Astron. Soc., 17, 545-549.
12. Cox, A. (1970), Latitude dependence of the angular dispersion of the geomagnetic field, Geophys. J. R. Astron. Soc., 20, 253-269.
13. Fisher, R. (1953), Dispersion on a sphere, Proc. R. Soc. London, Ser. A, 217, 295-305, doi:10.1098/rspa.1953.0064.
14. Haldan, M. M., C. G. Langereis, A. J. Biggin, M. J. Dekkers, and M. E. Evans (2009), A comparison of detailed equatorial red bed records of secular variation during the Permo-Carboniferous reversed superchron, Geo-phys. J. Int., 177, 834-848, doi:10.1111/j.1365-246X.2009.04124.x.
15. Hulot, G., and Y. Gallet (1996), On the interpretation of virtual geomagnetic pole (VGP) scatter curves, Phys. Earth Planet. Inter., 95, 37-53, doi:10.1016/0031-9201(95)03106-5.
16. Irving, E., and G. Pullaiah (1976), Reversals of the geomagnetic field, mag-netostratigraphy, and relative magnitude of paleosecular variation in the Phanerozoic, Earth Sci. Rev., 12, 35-64, doi:10.1016/0012-8252(76) 90053-2.
17. Kent, D. V., H. Wang, and P. Rochette (2010), Equatorial paleosecular variation of the geomagnetic field from 0 to 3 Ma lavas from the Galapagos Islands, Phys. Earth Planet. Inter., 183, 404-412, doi:10.1016/j. pepi.2010.08.010.
18. Khokhlov, A., G. Hulot, and J. Carlut (2001), Towards a self-consistent approach to palaeomagnetic field modelling, Geophys. J. Int., 145, 157-171, doi:10.1111/j.1365-246X.2001.01386.x. (Pubitemid 32282086)
19. Khokhlov, A., G. Hulot, and C. Bouligand (2006), Testing statistical palaeomagnetic field models against directional data affected by measurement errors, Geophys. J. Int., 167, 635-648, doi:10.1111/j.1365-246X.2006.03133.x. (Pubitemid 44697428)
20. Kono, M. (1997), Distributions of paleomagnetic directions and poles, Phys. Earth Planet. Inter., 103, 313-327, doi:10.1016/S0031-9201(97) 00042-3.
21. Lawrence, K. P., L. Tauxe, H. Staudigel, C. G. Constable, A. Koppers, W. McIntosh, and C. L. Johnson (2009), Paleomagnetic field properties at high southern latitude, Geochem. Geophys. Geosyst., 10, Q01005, doi:10.1029/ 2008GC002072.
22. McElhinny, M. W., and R. T. Merrill (1975), Geomagnetic secular variation over the past 5 My, Rev. Geophys., 13, 687-708, doi:10.1029/RG013i005p00687.
23. McFadden, P. L., and M. W. McElhinny (1984), A physical model for palaeosecular variation, Geophys. J. R. Astron. Soc., 78, 809-830.
24. McFadden, P., R. Merrill, and M. McElhinny (1988), Dipole/quadrupole family modeling of paleosecular variation, J.Geophys. Res., 93, 11,583-11,588, doi:10.1029/JB093iB10p11583.
25. McFadden, P., R. Merrill, M. McElhinny, and S. J. Lee (1991), Reversals of the Earth's magnetic field and temporal variations of the dynamo families, J. Geophys. Res., 96, 3923-3933, doi:10.1029/90JB02275.
26. Opdyke, N. D., M. Hall, V. Mejia, K. Huang, and D. A. Foster (2006), Time-averaged field at the equator: Results from Ecuador, Geochem. Geophys. Geosyst., 7, Q11005, doi:10.1029/2005GC001221.
27. Opdyke, N. D., D. V. Kent, K. Huang, D. A. Foster, and J. P. Patel (2010), Equatorial paleomagnetic time-averaged field results from 0-5 Ma lavas from Kenya and the latitudinal variation of angular dispersion, Geochem. Geophys. Geosyst., 11, Q05005, doi:10.1029/2009GC002863.
28. Roberts, P., and M. Stix (1972), Alpha-effect dynamos, by the Buliard-Geflman Formalism, Astron. Astrophys., 18, 453-466.
29. Smirnov, A. V., J. A. Tarduno, and D. A. D. Evans (2011), Evolving core conditions ca. 2 billion years ago detected by paleosecular variation, Phys. Earth Planet. Inter., 187, 225-231, doi:10.1016/j.pepi.2011.05.003.
30. Tauxe, L., and D. Kent (2004), A simplified statistical model for the geomagnetic field and the detection of shallow bias in paleomagnetic inclinations: was the ancient magnetic field dipolar?, in Timescales of the Paleomagnetic Field, Geophys. Monogr. Ser., vol. 145, edited by J. Channell et al., pp. 101-115, AGU, Washington, D. C., doi:10.1029/145GM08