Roughness of three types of gravity disturbances and their correlation with topography in rugged mountains and flat regions |
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| Authors: | Robert Tenzer H Hamayun Peter Vajda |
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| Institution: | (1) Geophysical Institute, Slovak Academy of Sciences, Bratislava, 845 28, Slovak Republic;(2) Department of Civil Engineering, Tallinn University of Technology, Tallinn, 19086, Estonia;(3) Institute of Meteorology and Geophysics, University of Vienna, Vienna, 1090, Austria;(4) Department of Geodesy and Geomatics Engineering, University of New Brunswick, Fredericton, N.B, Canada, E3B 5A3;(5) Research Institute of Geodesy, Topography and Cartography, Pilsen, Czech Republic;(6) Department of Mathematics, University of West Bohemia, Zdiby, Czech Republic;(7) Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft, The Netherlands |
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| Abstract: | We investigate the roughness of and the correlation with topography of the observed, topographically corrected (T), and bathymetrically
and topographically corrected (BT) gravity disturbances. The numerical investigation is carried out for the gravity disturbances
at the Earth’s surface and for the upward continued gravity disturbances at different altitudes. The area of study comprises
a rough part of the Canadian Rockies surrounded by flat regions. The smoothest at the Earth’s surface are the BT gravity disturbances.
The evolution of roughness with altitude shows an interesting phenomenon, diverse for the three types of gravity disturbances.
The correlation with topography over the study area of the observed gravity disturbances is bellow 0.6, and of the BT gravity
disturbances approximately −0.6. The largest absolute value, of about −0.75, is found between the topography and the T gravity
disturbances. This large negative correlation indicates a presence of the isostatic compensation in mountainous regions of
the Canadian west coast. |
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