Modeling Topography Effects on Lunar Surface Heat Flow and Subsurface Temperature

Details Modeling Topography Effects on Lunar Surface Heat Flow and Subsurface Temperature Modeling Topography Effects on Lunar Surface Heat Flow and Subsurface Temperature

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufm.p51c1444l&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #P51C-1444

Physics

[5418] Planetary Sciences: Solid Surface Planets / Heat Flow, [6250] Planetary Sciences: Solar System Objects / Moon

Scientific paper

Surface heat flow is an important physical factor characteristic of the thermal state and thermal history of a planet. Surface topography and heat source density both influence surface heat flow significantly. Using an axisymmetric finite element model (FEM) and topographic and geochemical data collected by China’s Chang’e-1 spacecraft, we investigate the effects of topography and crustal heat sources on the surface heat flow of the Moon. China’s Chang’e-1 spacecraft was launched on October 24, 2007, and impacted the Moon on March 1, 2009 after a 16 month orbital mission. The Gamma ray spectrometer (GRS) onboard Chang’e-1 returned data on the distribution of U, K, and Th on the lunar surface, based on which we derive the crustal radionuclide heat source density. Data collected by the CCD stereo camera and laser altimeter (CCD & LAM) were employed to produce a global DEM with a spatial resolution of 3 Km. Our results quantitatively show that surface topography, such as craters, basins, and ridges, significantly change measured surface flow and temperature field. We also present our results on the global surface heat flow and crustal temperature field, taking into consideration of the topographical effects.

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