Magnetic Charts in Antarctica and Neighboring Areas.

• Main Authors: Leroy R. Alldredge, Zurab Kobiashvili
• Format: Report
• Language: English
• Published: Institute for Earth Sciences, Environmental Science ServicesAdministration/Institute for Earth Sciences, EnvironmentalScience Services Administration 1967
• Subjects: South Pole; Nagata; Antarc*; Antarctica; South pole
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=74; http://id.nii.ac.jp/1291/00000074/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=74&item_no=1&attribute_id=18&file_no=1

Data, from many available recent sources, on the magnetic field in Antarctica and neighboring areas are intercompared. Field values were computed for the spherical harmonic models of HURWITZ et al., and LEATON et al., for 1965 at intervals of 5°in latitude and 10°in longitude between 40°S and the South Pole. The rms differences were 0.76°for D, 0.43°for I and 185 gammas for H. A similar comparison between the model of CAIN for 1960 and the model of NAGATA and OGUTI for 1958.5 updated to 1960 gave rms differences of 3.0°, 0.93°and 775 gammas for D, I, and H respectively. Comparison between the 1965 models and several recent traverses indicate that the LEATON model is more accurate in this area than the HURWITZ model. Comparison between earlier traverses and the 1960 models favor the CAIN model over the NAGATA and OGUTI model, although part of this may be caused by uncertain secular change data used to bring the model up to the date of the traverses.