SPATIAL STRUCTURE OF THE GEOMAGNETIC FIELD AND ITS GLOBAL AND REGIONAL VARIABILITY IN THE 20TH CENTURY.

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Zarya; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.202.5800; http://www.geomag.bgs.ac.uk/intas/perrep01-0142_2003_1.pdf

The general objective of the Project is to model and study the geomagnetic field structure in space and in time generated by sources in the dynamic fluid outer core of the Earth, the crust and in the ionosphere and magnetosphere. The first step to achieving this is to make compilations of all suitable data. Task 1 in the work programme which covers this work has been completed and much of this effort is ongoing to ensure ground-based datasets are contemporary with valuable satellite datasets which run into the 21 st century, eg from Ørsted and CHAMP. Teams CO (observatory and repeat station data), CR2 (Ørsted satellite data and calibration thereof), CR5 (observatory annual means and declination data used in marine navigation in early 20 th century), CR9 (data from surveys made world-wide on the non-magnetic ship Zarya and estimation of their accuracies), have lead the work for these specific global data types, and many datasets are duplicated in different institutes. Datasets of a more local nature have also been collected and collated, in particular by CR3 (Antarctica), CR6 (magnetic observations in the Transcarpathian seismoactive trough for the study of secular variation anomalies) and CR7 (highresolution