Interaction of fluvial and lacustrine/marine processes on Titan

Details Interaction of fluvial and lacustrine/marine processes on Titan Interaction of fluvial and lacustrine/marine processes on Titan

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p32c..01a&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P32C-01

Other

[5419] Planetary Sciences: Solid Surface Planets / Hydrology And Fluvial Processes, [6281] Planetary Sciences: Solar System Objects / Titan

Scientific paper

Synthetic Aperture Radar images of Titan's surface acquired by Cassini reveal a host of lakes and seas at high latitudes, dominantly in the north. Channel systems are seen to drain into some bodies, while other shorelines appear relatively undissected at the resolution of the available data (≤300 m/pix). Digital Elevation Models derived from stereo SAR imagery allow quantitative analysis of near-shore topography, with improved accuracy due to an innovative de-noising algorithm (see also Lucas et al., AGU 2011). Here we consider the interaction of fluvial systems with lakes and seas, and their relative contribution to the liquid filling these as a function of size. We find evidence for the topographic effect of near-shore incision at the shorelines of Kraken Mare, at and near the island Mayda Insula. We identify a shoulder in the histogram (at an elevation of approximately -240 m in Figure 1) suggesting that fluvial and/or lacustrine processes redistributed near-shore material forming a topographic bench. Terrestrial examples show similar patterns in the hypsometric distribution, owing to fluvial erosion. These results are consistent with observations from SAR images and show that erosion and sediment transport have influenced the topography substantially, with their integrated action quantifiable volumetrically.

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