P022:
Judging an ocean world by its cover: the evolution of ocean world surfaces by exogenous processes





Session ID#: 26786

Session Description:
This session invites contributions that explore the evolution of ocean worlds by exogenic processes. External agents modify the surface by photolysis, magnetospheric particle interactions, and micrometeoroids from a variety of sources.  Examples of weathering include modifications of the surface’s thermal and optical properties by energetic electrons and the delivery of new material, such as Saturnian E ring organics, to the surface.  In addition, current activity on ocean worlds can modify the body’s own surface and that of its neighbors. Laboratory experiments on how ice and non-ice materials evolve under irradiation or dust impact provide insight into these processes. Making sense of these exogenic pathways that affect these bodies will help us to separate the signatures of exogenous processes from endogenic processes to better understand the evolution of ocean worlds.
Primary Convener:  Charles Hibbitts, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
Convener:  Chris Paranicas, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
Index Terms:

6017 Erosion and weathering [PLANETARY SCIENCES: COMETS AND SMALL BODIES]
6025 Interactions with solar wind plasma and fields [PLANETARY SCIENCES: COMETS AND SMALL BODIES]
6055 Surfaces [PLANETARY SCIENCES: COMETS AND SMALL BODIES]
6060 Radiation and chemistry [PLANETARY SCIENCES: COMETS AND SMALL BODIES]

Abstracts Submitted to this Session:

Kevin P Hand and Robert W Carlson, Jet Propulsion Laboratory, Pasadena, CA, United States
Charles Hibbitts1, Karen Stockstill-Cahill2, Chris Paranicas3 and Benjamin R Wing1, (1)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (2)JHU-APL, Laurel, MD, United States, (3)Applied Physics Lab, Laurel, MD, United States
Reggie Hudson, Mark J Loeffler and Perry Gerakines, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Roger Nelson Clark, Planetary Science Institute Tucson, Tucson, AZ, United States, Robert Hamilton Brown, Univ Arizona, Tucson, AZ, United States, Gregg A Swayze, U.S. Geological Survey, Denver, CO, United States and Dale P Cruikshank, NASA, Moffett Field, CA, United States
Karen R S Cahill1, Charles Hibbitts2 and Benjamin R Wing2, (1)Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States, (2)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
John R Spencer, Southwest Research Institute Boulder, Boulder, CO, United States and William M Grundy, Lowell Observatory, Flagstaff, AZ, United States

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