Time changes in secular geomagnetic variations

Geomagnetism and Aeronomy

Volumn 42, Issue 5, 2002, Pages 676-687

  Rotanova, N M ^a   Bondar', T N ^a   Ivanov, V V ^a  

^a PUSHKOV INSTITUTE OF TERRESTRIAL MAGNETISM   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

GEOMAGNETIC FIELD; SECULAR VARIATION; SPHERICAL HARMONICS;

EID: 0036035292     PISSN: 00167932     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (35)

1. Alexandrescu, M., Gibert, D., Hulot, G., Le Mouel, J.-L., and Saracco, G., Detection of Geomagnetic Jerks Using Wavelet Analysis, J. Geophys. Res., 1995, vol. 100, no. B7, pp. 12557-12575.
2. Alexandrescu, M., Gibert, D., Hulot, G., Le Mouel, J.-L., and Saracco, G., Worldwide Wavelet Analysis of Geomagnetic Jerks, J. Geophys. Res., 1996, vol. 101, no. B10, pp. 21975-21994.
3. Alldredge, L.R., A Discussion of Impulses and Jerk in the Geomagnetic Field, J. Geophys. Res., 1984, Vol. 89, no. B6, pp. 4403-4412.
4. Alldredge, L.R., Localized Sudden Changes in the Geomagnetic Secular Variation, J. Geomagn. Geoelectr., 1987, vol. 39, pp. 111-118.
5. Astaf'eva, N.M., Wavelet Analysis: Theory Fundamentals and Application Examples, Usp. Fiz. Nauk, 1996, vol. 166, no. 11, pp. 1145-1170.
6. Bondar', T.N., Kolomiitseva, G.I., and Sayutina, O.A., Spherical Harmonic Models of the Geomagnetic Field Secular Variations for Three Overlapping Intervals: 1920-1986, 1938-1986, and 1958-1986, Geomagn. Aeron., 1989, vol. 29, no. 5, pp. 835-839.
7. Braginskii, S.I. and Fishman, V.M., Sixty-Year Variations in the Geomagnetic Field and the Mantle Conductivity, Geomagn. Aeron., 1977, vol. 17, no. 6, pp. 916-926.
8. Courtillot, V.E. and Le-Mouel, J.-L.,Geomagnetic Secular Variation Impulses, Nature, 1984, vol. 311, pp. 709-715.
9. Courtillot, V.E. and Le-Mouel, J.-L., Time Variations of the Earth's Magnetic Field: From Daily to Secular, Ann. Rev. Earth Planet. Sci., 1988, vol. 16, pp. 389-476.
10. Ducruix, J., Courtillot, V., and Le Mouel, J.-L., The Late 1960s Secular Variation Impulse, the Eleven Year Magnetic Variation and the Electrical Conductivity of the Deep Mantle, Geophys. J. R. Astron. Soc., 1980, vol. 61, pp. 73-94.
11. Gavored, J., Gibert, D., Menvielle, M., and Le Mouel, J.-L., Long-Term Variations of the External and Internal Components of the Earth's Magnetic Field, J. Geophys. Res., 1986, vol. 91, pp. 4787-4796.
12. Gibert, D., Holschneider, M., and Le-Mouel, J.-L., Wavelet Analysis of the Chandler Wobble, J. Geophys. Res., 1998, vol. 103, no. B11, pp. 27069-27089.
13. Gire, C., Le Mouel, J.-L., and Ducruix, J., Evolution of the Geomagnetic Secular Variation Field from the Beginning of the Century, Nature, 1984, vol. 307, pp. 349-352.
14. Golovkov, V.P. and Simonyan, A.O., On Sharp Changes in the Geomagnetic Field Secular Variations in the Late 1970s, Geomagn. Aeron., 1991, vol. 31, no. 1, pp. 165-171.
15. Golovkov, V.P., Kolomiitseva, G.I. Konyashchenko, L.P., and Semenova, G.M., Katalog srednegodovykh znachenii elementov geomagnitnogo polya mirovoi seti magnitnykh observatorii (Catalog of the Average Annual Values of the Geomagnetic Field Elements at the Global Network of Magnetic Observatories), Moscow: Inst. Zemn. Magn. Ionos. Rasprostr. Radiovoln Akad. Nauk SSSR, 1983.
16. Golovkov, V.P., Simonyan, A.O., and Yakovleva, S.V., Calculation of the Velocity Field at the Earth's Core Surface Inferred from the Data on Geomagnetic Jerks, Geomagn. Aeron., 1996, vol. 36, no. 1, pp. 114-126.
17. Gubbins, D. and Tomlinson, L., Secular Variation from Monthly Means from Apia and Amberley Magnetic Observatories, Geophys. J. R. Astron. Soc., 1986, vol. 86, pp. 603-616.
18. Hide, R., A Note on Short Term Core-Mantle Coupling, Geomagnetic Secular Variations Impulses, and Potential Magnetic Field Invariants as Lagragian Tracers of Core Motions, Phys. Earth Planet. Int., 1985, vol. 39, no. 4, pp. 297-300.
19. Kalinin, Yu.D., Secular Variations and Changes in a Day Length, Meteorol. Gidrol., 1949, no. 3, pp. 15-19.
20. Kalugin, V.I., Rotanova, N.M., and Golovkov, V.P., Spatial Structure of the 60- and 30-Year Variations in the Geomagnetic Field according to the Data of Analytical Models, Geomagn. Aeron., 1984, vol. 24, no. 5, pp. 780-786.
21. Kerridge, D.J. and Barraclough, D.R., Evidence for Geomagnetic Jerks from 1931 to 1971, Phys. Earth Planet. Inter., 1985, vol. 39, pp. 228-236.
22. Langel, R.A., Kerridge, D.J., Barraclough, D.R., and Malin, S.R., Geomagnetic Temporal Change: 1903-1982, a Spline Representation J. Geomagn. Geoelectr., 1986, vol. 38, pp. 673-697.
23. Le Mouel, J.-L. and Courtillot, V., Core Motions, Electromagnetic Core-Mantle Coupling and Variations in the Earth's Rotation: New Constraints from Geomagnetic Secular Variation Impulses, Phys. Earth. Planet. Int., 1981, vol. 24, pp. 236-241.
24. Le Mouel, J.-L., Ducruix, J., and Duyen, C.H., The Worldwide Character of the 1969-70 Impulse of the Secular Acceleration Rate, Phys. Earth Planet. Inter., 1982, vol. 28, pp. 337-350.
25. Malin, S.R. and Hodder, B.M., Was the 1970 Geomagnetic Jerk of Internal Or External Origin, Nature, 1982, no. 296, pp. 726-728.
26. Malin, S.R.C., Hodder, B.M., and Barrachlough, D.R., Geomagnetic Secular Variations: A Jerk in 1970, Publicado on volumen conmemorative 75 aniversario del Odservatoria del Ebro, 1983, pp. 239-256.
27. Mc Leod, M.C., On the Geomagnetic Jerk of 1969, J. Geophys. Res., 1985, vol. 90, pp. 4597-4610.
28. Orlov, V.P., Secular Variations in the Geomagnetic Field and Its Unusually Sharp Changes, Tr. Inst. Zemn. Magn. Ionos. Rasprostr. Radiovoln Akad. Nauk SSSR, 1961, no. 18(28), pp. 77-86.
29. Papitashvili, N.E., Rotanova, N.M., and Fishman, V.M., Estimation of the Lower Mantle Conductivity from the Results of Studying the 60- and 30-Year Variations in the Geomagnetic Field, Geomagn. Aeron., 1982, vol. 22, no. 6, pp. 1010-1015.
30. Rotanova, N.M. and Filippov, S.V., Detection and Analysis of the 1969 Jerk in Geomagnetic Secular Variations, Geomagn. Aeron., 1987, vol. 27, no. 5, pp. 1001-1005.
31. Runcorn, S.K., Geodymanic Implications Short Time Scale Changes in the Geomagnetic Dynamo, Phys. Earth Planet. Int., 1985, vol. 41, pp. 73-77.
32. Voorhies, C.V., Steady Flows at the Top of Earth's Core Derived from Geomagnetic Field Models, J. Geophys. Res., 1986, vol. 91, no. B12, pp. 1244-1266.
33. Walker, J.B. and O'Dea, P.L., Geomagnetic Secular Change Impulses, Trans. Am. Geophys. Union, 1952, vol. 33, pp. 797-800.
34. Weber, A.M. and Roberts, E.B., The 1950 World Isogonic Chart, J. Geophys. Res., 1951, vol. 56, pp. 81-84.
35. Whaler, K.A., Geomagnetic Evidence for Fluid Upwelling at the Core-Mantle, Geophys. J. R. Astron. Soc., 1996, vol. 86, pp. 563-588.