SE11
Geomagnetism: From Near-Earth Observation to Deep-Earth Dynamics

Main Organiser
Weijia Kuang, NASA Goddard Space Flight Center
Space Geodesy branch, Code 926, Greenbelt, MD 20771, USA
Weijia.Kuang-1@nasa.gov

Co-Organiser(s)
Masaki Matsushima
Tokyo Institute of technology, Japan
mmatsush@geo.titech.ac.jp

Wengyao Xu
Institute of Geology and geophysics, Chinese Academy of Sciences
wyxu@mail.igcas.ac.cn

Brief Description
Geomagnetism has been known for more than 4000 years. Space-born, aero and surface geomagnetic measurements provide much information on variations of the geomagnetic field from meters to thousands of kilometers in space, and from minutes to centuries in time, which are manifestations of various geophysical processes occurring around and within the planet. Understanding the observed geomagnetic signals is therefore important to the researches in many geophysical disciplines. For example, the dominant part of the geomagnetic observations (e.g. the core filed) can be explained by convection in the Earth’s liquid outer core that generates and maintains a strong magnetic field in much of the Earth’s history (geodynamo). In addition to geodynamo modeling, the observed geomagnetic secular variation can be used to construct core flow beneath the core-mantle boundary, which can then be used to explain decadal variation of the Earth’s rotation, and may also contribute to time va! riable gravity that are two of the geodetic observables. Observed spatial geomagnetic variation (e.g. those on the scales of hundreds of kilometers) can be used to explore lithospheric/crustal structures.