Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eostr..90..213f&link_type=abstract
Eos, Transactions American Geophysical Union, Volume 90, Issue 25, p. 213-214
Physics
5
Geomagnetism And Paleomagnetism: Satellite Magnetics: Main Field, Crustal Field, External Field, Planetary Sciences: Solar System Objects: Mars, Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Radiation Belts, Geomagnetism And Paleomagnetism: Instruments And Techniques
Scientific paper
The Decade of Geopotential Field Research, inaugurated in 1999 with the launch of the Danish satellite Ørsted on 23 February, was designed as an international effort to promote and coordinate continuous monitoring of geopotential field variability in the near-Earth environment. Since 1999, the Challenging Minisatellite Payload (CHAMP), the Gravity Recovery and Climate Experiment (GRACE), the Satélite de Aplicaciones Científicas-C (SAC-C), and most recently, the Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellites have combined with Ørsted to generate an unprecedented wealth of data on Earth's magnetic and gravity fields. Interpretation of the new magnetic data from the Decade has led to improvements in scientists' knowledge of the fast changing small scales of the Earth's magnetic field, providing details of magnetic field generation within the Earth's core. The new magnetic data have also been used in the World Digital Magnetic Anomaly Map (WDMAM) project, which “images” the lithosphere's igneous and metamorphic rocks. Such data, associated theory, and modeling work also led to the discovery of previously undetected processes with magnetic signatures that can be observed by satellites, including oceanic tides, ionospheric pressure gradient currents and ionospheric plasma irregularities, and serpentinized mantle overlying subduction zones. Knowledge of the magnetic properties of these processes provides scientists with a new perspective of the physics involved in the phenomena.
Friis-Christensen Eigil
Haagmans Roger
Hulot Gauthier
Lühr Hermann
Purucker Michael
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