Mathematics – Logic
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....14142h&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #14142
Mathematics
Logic
Scientific paper
Analyis of Mars Global Surveyor MOC images taken in Martian winter and spring has revealed a peculiar spotting phenomenon on the dark dunes in the polar region of Mars [1]. These spots are named Dark Dune Spots (DDSs) and various hypotheses have been put forward for their origin and formation process, which fall into two main groups: geophysical and biological [2, 3, 4, 5 and 6]. Because the high-resolution images by MGS-MOC have shown well-developed and recurrent DDSs on some dark dune fields since the Southern winter of 1999 [5, 6 and 7], we have selected two areas of them. They are many dozen kilometers in size in the Southern polar region. Namely: the "Inca City" area (λ=295.3^oE, ϕ=81.5^oS) and the Northern part of Pityusa Patera (λ=37^oE, ϕ=66^oS), which we call "Csontváry" area. These two areas could be excellent test areas for Mars Express in order to reveal the mechanism of the formation, development and annual recurrence of the DDSs. For this we propose, that different instruments (HRSC, spectrometers, etc.) of the orbiter of the ESA Mars Express Mission should produce high-resolution images and spectral measurements of the frosted surface of the dark dunes of the "Inca City" and the Pityusa Patera from the second half of the Southern winter till the end of spring, with weekly regularity, because this may be sufficient to choose between the abiogenic and the biogenic origin of DDSs. Referenes [1] Malin, M. C. and Edgett, K. S.: 2000, Frosting and defrosting of Martian polar dunes, LPS XXXI, #1056, Houston-CD. [2] Horváth, A., Gánti, T., Gesztesi, A., Bérczi, Sz., Szathmáry, E., 2001, Probable evidences of recent biological activity on Mars: appearance and growing of dark dune spots in the south polar region. LPS XXXII, # 1543, Houston-CD. [3] Malin, M. C. and Edgett, K. S.: 2001, The Mars Global Surveyor Mars Orbiter Camera: Interplanetary Cruise through Primary Mission. J. Geophys. Res. 106 E10, p. 23,429-23,570. [4] Gánti, T., Horváth, A., Gesztesi, A., Bérczi, Sz., Szathmáry E.: 2002, Defrosting and Melting, not Defrosting Alone, Lunar Planetary Science XXXIII, #1221, Houston-CD. [5] Horváth, A., Bérczi, Sz., Gánti, T., Gesztesi, A., Szathmáry E.: 2002, The “Inca City” Region of Mars: Test field for Dark Dune Spots Origin, LPS XXXIII, #1109, Houston-CD. [6] Gánti, T., Horváth, A., Gesztesi, A., Bérczi, Sz., Szathmáry, E., 2003, Dark dune spots: possible biomarkers on Mars? OLEB in print. [7] Horváth, A., Gánti, T., Bérczi, Sz., Gesztesi, A., Szathmáry, E., 2003, Morphological analysis of annual recurrence of dark dune spots on Southern Polar Region, LPS XXXIV.
Bérczi Sz.
Fernández-Remolar David
Ganti Tibor
Gesztesi Albert
Horvath Andras
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