Insolation Effects on Lunar Hydrogen: Correlated observations of LEND and Second Order Insolation Effects Derived from LOLA Modeling

Details Insolation Effects on Lunar Hydrogen: Correlated observations of LEND and Second Order Insolation Effects Derived from LOLA Modeling Insolation Effects on Lunar Hydrogen: Correlated observations of LEND and Second Order Insolation Effects Derived from LOLA Modeling

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13d1736m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P13D-1736

Physics

[1026] Geochemistry / Composition Of The Moon, [5462] Planetary Sciences: Solid Surface Planets / Polar Regions, [6250] Planetary Sciences: Solar System Objects / Moon

Scientific paper

The Moon's polar permanent shadow regions (PSR) have long been considered the unique repository for volatile Hydrogen (H). This postulate was due to the extreme and persistently cold environment that has been maintained over eons of lunar history. However, we have recently reported two results that have challenged the PSR hypothesis. 1) that higher lunar H distributions are only weakly correlated to the PSR condition. 2) We suggest a relationship between higher H in the context of pole-facing slopes relative to equator facing slopes. Correlated observations by the Lunar Exploration Neutron Detector (LEND) onboard the Lunar Reconnaissance Orbiter (LRO) and the Lunar Orbiting Laser Altimeter (LOLA) have been performed indicating pole-facing slopes have 0.01 to 0.02 cps lower epithermal count rates than their equivalent equator-facing slopes. These bulk observations were hypothesis tested and indicate a significant and consistent relationship between topographically modulated insolation effects derived from specialized transformations of LOLA digital elevation models (DEM)'s and LEND maps for latitudes > 60 deg latitude. In this presentation we review the techniques and results from the recent high latitude analysis and apply similar techniques to equatorial regions. We also compare results to second order modeling results derived from long-term LOLA numerical modeling of insolation conditions on the Moon. Results from our low latitude analysis will be reported. We discuss interpretations and implications for Lunar Hydrogen studies

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