Non-longitudinal drifts of the earth's magnetic field

Details Non-longitudinal drifts of the earth's magnetic field Non-longitudinal drifts of the earth's magnetic field

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988geoj...92..149o&link_type=abstract

Geophysical Journal (ISSN 0952-4592), vol. 92, Jan. 1988, p. 149-163.

Physics

2

Drift Rate, Geomagnetism, Longitude, Magnetic Anomalies, Secular Variations, Spherical Harmonics, Earth Surface, Error Analysis, Least Squares Method, Magnetic Field Configurations

Scientific paper

Empirical models of secular geomagnetic-field variations are investigated analytically, with a focus on the role of nonlongitudinal rotation (NLR). The approach employed is based on transformation of spherical harmonics under rotation of the reference frame (Winch and James, 1973) and comprises two steps: (1) obtaining an analytical expression for the coefficients of the rotated field in terms of the original coefficients and the three rotation parameters, and (2) solving the inverse problem numerically to determine the rotation parameters which best fit the observed secular variation. Results for the POGO and GSFC models at 1968 are presented in tables and graphs, and it is concluded that NLRs of individual harmonics are the dominant feature of recent secular variation, with NLR nonuniformities corresponding to those of the geomagnetic dynamo.

Affiliated with

Also associated with

No associations

Rating

Non-longitudinal drifts of the earth's magnetic field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-longitudinal drifts of the earth's magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-longitudinal drifts of the earth's magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1046766