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FOREWORD

The Chinese National Committee for IUGG is pleased to present the 1999-2002 quadrennial China National Report on Geodesy and Geophysics to the membership of the International Union of Geodesy and Geophysics.

During the last four years, significant advances have been made in the study of Geodesy and Geophysics in China. The research of Geodesy and Geophysics played an important role in the sustainable development of economy and society by tackling the problems of resources, environment, natural disasters, and Geo-informatics. The observations, experiments, and theoretical modeling also have contributed to the understanding of the nature of the Earth, in which inter-disciplinary investigations are becoming more and more active.

The presentation of the 1999-2002 China National Report to the IUGG is a reflection to these advances, and provides the record of Chinese contributions to geodesy and geophysics. It is hoped that this National Report would be of help for Chinese scientists in exchanging the results and ideas in the research and application of geodesy and geophysics with colleagues all over the world.

The current National Report is the sixth China National Report to the IUGG. It contains seven parts compiled by the following sub-committees: 1. Geodesy;  2. Geomagnetism and Aeronomy; 3. Hydrological Sciences;  4. Meteorology and Atmosphere Sciences; 5. Physical Sciences of Oceans; 6. Seismology and Physics of Earth's Interior; 7. Volcanology and Geochemistry. The authors of each report are based on invitation. The Chinese National Committee for IUGG sincerely acknowledges the effort made by its sub-committees and the sponsorship and support of the  Department of International Affairs, Chinese Association for Science and Technology (CAST).

CHEN Junyong, President
CHEN Yuntai, Vice-President
ZHU Chuanzhen, Secretary-General
Chinese National Committee for IUGG

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