HR: 1330h
AN: GP13A-03    [Abstracts]
TI: Spectral Correlation of Antarctic Satellite Magnetic and Gravity Anomalies
AU: * Wells, S B
EM: wells.275@geology.ohio-state.edu
AF: Department of Geological Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210-1308 United States
AU: von Frese, R R
EM: vonfrese@geology.ohio-state.edu
AF: Department of Geological Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210-1308 United States
AU: Kim, H
EM: kimhr@core2.gsfc.nasa.gov
AF: GEST/UMBC at Planetary Geodynamics Branch, GSFC/NASA, Greenbelt, MD 20771 United States
AU: Potts, L
EM: potts.3@osu.edu
AF: Laboratory of Space Geodesy and Remote Sensing, The Ohio State University, 2070 Neil Avenue, Columbus, OH 43210 United States
AU: Kim, J
EM: jwkim@sejong.ac.kr
AF: Dept. of Geoinformation Engineering Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul, 143-747 Korea, Republic of
AU: Gaya-Pique, L R
EM: luis@geology.ohio-state.edu
AF: Department of Geological Sciences, The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210-1308 United States
AU: Gaya-Pique, L R
EM: luis@geology.ohio-state.edu
AF: Istituto Nazionale di Geofisica e Vulcanologia - Roma 2, Via di Vigna Murata, 605, Rome, 00143 Italy
AB: Large areas of the Antarctic continent lack terrestrial or airborne magnetic and gravity survey coverage due to the harsh climate and extended distances involved. Satellite missions therefore play an important role, often being the only source of information for the study of remote regions. NASA's GRACE satellite mission provides global-scale gravity measurements with a much higher spatial resolution than previous missions. The free-air gravity anomalies in Antarctica from GRACE offer new insights on the poorly understood Antarctic crust. New interpretations and candidates for further investigation are presented from spectral correlation analysis between the new GRACE free-air gravity anomalies and magnetic anomalies measured by the CHAMP and Ørsted satellites. We quantify the anomaly correlations using correlation filters based on Poisson's relation. Favorability indices are derived that highlight the positive and negative correlations between the satellite observed geopotential anomalies. Several positively and negatively correlated regional anomalies yield new insights on the enigmatic crustal tectonics of Queen Maud Land, Enderby Land and other regions of East Antarctica, and the West Antarctic Peninsula.
DE: 1234 Regional and global gravity anomalies and Earth structure
DE: 1299 General or miscellaneous
DE: 1517 Magnetic anomaly modeling
DE: 1599 General or miscellaneous
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2005 Joint Assembly