MASS DISTRIBUTION OF EARTH LANDFORMS DETERMINED BY ASPECTS OF THE GEOPOTENTIAL AS COMPUTED FROM THE GLOBAL GRAVITY FIELD MODEL EGM 2008

  • Jan Kalvoda Charles University in Prague, Faculty of Science, Department of Physical Geography and Geoecology, Czechia
  • Jaroslav Klokočník Astronomical Institute, Academy of Sciences of the Czech Republic
  • Jan Kostelecký Research Institute of Geodesy, Topography and Cartography, Czechia
  • Aleš Bezděk Astronomical Institute, Academy of Sciences of the Czech Republic
Keywords: Earth landforms, gravity field model EGM 2008, mass distribution, geodynamics, geomorphic processes

Abstract

Correlations of large-scale landform patterns with some aspects of the geopotential as computed from the global gravity field model EGM 2008, particularly the radial second derivatives of the disturbing gravitational potential Γ33, the strike angle θS and virtual deformations of the ellipse of deformation, are demonstrated. Selected regions with documentation of aspects from EGM 2008 are the Nepal Himalaya and its neighbouring areas, the collision zone of East-Asian and West-Pacific lithospheric plates, the contact region of north-eastern Africa, south-western Asia and south-eastern Europe, morphotectonic contact between the Bohemian Massif, Eastern Alps and the Western Carpathians in Central Europe and regions of ancient rapid events indicated by relics of large impact craters Vredefort, Chicxulub and Popigai. It is suggested that landform patterns with very conspicuous combinations of significantly high positive or negative values of Γ33 are under the strong influence of rapid and/or intensive geomorphic processes. These geophysical signatures supported by values of the strike angle θS and virtual dilatations or compressions of the ellipse of deformation reflect the regional dynamics of Earth surface evolution as  characterised by a very effective integration of tectonic and climate-driven morphogenetic processes.

Published
2013-11-20
How to Cite
Kalvoda, J., Klokočník, J., Kostelecký, J., & Bezděk, A. (2013). MASS DISTRIBUTION OF EARTH LANDFORMS DETERMINED BY ASPECTS OF THE GEOPOTENTIAL AS COMPUTED FROM THE GLOBAL GRAVITY FIELD MODEL EGM 2008. AUC Geographica, 48(2), 17-25. Retrieved from http://aucgeographica.cz/index.php/aucg/article/view/122
Section
Original Articles