000193239 001__ 193239
000193239 003__ CZ-ZdVUG
000193239 005__ 20190520094956.0
000193239 041__ $$aeng
000193239 040__ $$aABC039$$bcze
000193239 1001_ $$aKlokočník, Jaroslav
000193239 24510 $$aOn feasibility to detect volcanoes hidden under the ice of Antarctica via their gravitational signal
000193239 300__ $$a22 stran
000193239 500__ $$aRIV: RIV/00025615:_____/16:N0000020
000193239 5203_ $$9eng$$aMany undiscovered volcanoes may be hidden under the thick layers of the ice of Antarctica. Hypothetic volcanoes were sought by means of the best present-day gravitational data (gravity field model EIGEN 6C4) and bedrock topography data (Bedmap2). A new previously unused method was tested. The analogy with the "gravitational signal" typical for volcanoes and other structures in other parts of the Earth is used. Various functions (not only ordinary gravity anomalies) of the disturbing geopotential were employed: Marussi tensor of the second derivatives, geopotential invariants, the strike angle and the virtual deformations. We attempted to discover if the best present-day gravitational and topographic data are of sufficient precision and resolution and how fast is the attenuation of the "gravitational signal" of a volcano with increasing depth under the ice. It is shown that there is no principal obstacle to detect volcanoes by our method. However, it appeared very quickly that our present-day attempts to discover such volcanoes could hardly be successful, mainly due to a low resolution of the existing gravity data and also due to a low resolution of the best bedrock topography of Antarctica currently available. Nevertheless, some examples of hypothetical volcanoes under the ice are given, but they are uncertain. However, the method, the main goal of this feasibility study, is ready and working.
000193239 655_4 $$aanotace
000193239 653_0 $$avulcanoes$$aAntarctica$$aGravity field
000193239 7001_ $$aKostelecký, Jan
000193239 7001_ $$aPešek, Ivan
000193239 7001_ $$aBezděk, Aleš
000193239 7730_ $$92016$$g59(5)$$tAnnals of geophysics$$x1593-5213
000193239 856__ $$uurn:doi:10.4401/ag-7102
000193239 85642 $$uhttps://www.rvvi.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F16%3AN0000020%21RIV17-MSM-00025615
000193239 910__ $$aABC039
000193239 980__ $$aclanky_vugtk
000193239 985__ $$autvar24
000193239 985__ $$aanotace
000193239 985__ $$ariv
000193239 985__ $$akosteleckyjan
000193239 999C1 $$9CURATOR$$aLO1506 - Podpora udržitelnosti centra NTIS - Nové technologie pro informační společnost (2015 - 2020)