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    2019年9月2日“堅白”學術論壇(2019年第7期)

    時間:2019-08-30 來源:未知 點擊:
    報告題目:Implications of understanding Earth's inner structure and processes         
    報  告  人:Assist. Prof. Ing. Robert Tenzer, PhD, Hong Kong Polytechnic University   
    邀  請  人:申文斌 教授   
    報告時間:2019年9月2日(周一)下午16:00 - 17:30 (1小時演講+半小時討論)      
    報告地點:測繪學院227學術報告廳
     
    報告人簡歷:
    Dr. Tenzer is the assistant professor in the Department of Land Surveying and Geo-Informatics at the Hong Kong Polytechnic University. He received MSc in Geodesy and Cartography (in 1995) and PhD in Physical Geodesy (in 1999) at the Slovak Technical University, as well as PhD in Satellite Geodesy (in 2008) at the Czech Technical University. Between 2001-2008, he held research positions at the University of New Brunswick, the University of Newcastle upon Tyne and the Delft University of Technology. Between 2009-2012, he taught at the University of Otago. Between 2012-2016, he was a visiting professor in the School of Geodesy and Geomatics at the Wuhan University. His research interests cover broad areas of Geodesy, Geophysics, Geodynamic and Planetary Science, with a major focus on geospatial modeling techniques and interpretations, theoretical geodesy and geophysics, geo-referencing, planetary inner structure and processes. He is the author of 4 books and more than 200 research journal articles (163 records on Scupus, 133 records on WoS). He presented his research in more than 200 conference contributions and 60 invited lectures at universities around the world. He is the member of editorial board and scientific adviser to several journals, while also contributing as the reviewer to more than 40 journals (including Nature Geoscience). Currently, he is the chair of the International Association of Geodesy (IAG) study group IC-SG7: Earth‘s inner structure from combined geophysical sources.
     
    報告摘要:
    Results of seismic surveys are primarily used to interpret the Earth’s inner structure. In the absence or a low coverage of seismic surveys (most of oceanic areas and large parts of Antarctica,  Africa Greenland and South America), satellite-gravity data (characterized by a global and homogenous coverage, with well-defined stochastic properties) have become more often used for this purpose. Methods for a gravimetric forward and inverse modelling with additional constraining information from seismic velocities and rheological parameters of the lithosphere could provide a better understanding of the structure and processes within the lithosphere as well as deeper in the asthenosphere mantle. To demonstrate this, we present various results, obtained from the gravimetric modelling, and interpret them in the context of global tectonism, volcanism, mantle convection, lithospheric flexural response to a load, and other geodynamic processes. We also demonstrate how gravity and topographic models (derived from orbital parameters and from active altimetry radars on board of orbiting satellites) could improve the knowledge about the inner structure of other telluric planets (Mercury, Venus and Mars) and the Moon as well as about a possible origin of their surface formations. Summarizing major findings from presented results, we also accentuate some implications of tectonic processes on the Earth to the evolution of life, humans as well as to different societal development.
     
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