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2017 ; 3
(9
): e1701471
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English Wikipedia
Water on the surface of the Moon as seen by the Moon Mineralogy Mapper:
Distribution, abundance, and origins
#MMPMID28924612
Li S
; Milliken RE
Sci Adv
2017[Sep]; 3
(9
): e1701471
PMID28924612
show ga
A new thermal correction model and experimentally validated relationships between
absorption strength and water content have been used to construct the first
global quantitative maps of lunar surface water derived from the Moon Mineralogy
Mapper near-infrared reflectance data. We find that OH abundance increases as a
function of latitude, approaching values of ~500 to 750 parts per million (ppm).
Water content also increases with the degree of space weathering, consistent with
the preferential retention of water originating from solar wind implantation
during agglutinate formation. Anomalously high water contents indicative of
interior magmatic sources are observed in several locations, but there is no
global correlation between surface composition and water content. Surface water
abundance can vary by ~200 ppm over a lunar day, and the upper meter of regolith
may contain a total of ~1.2 × 10(14) g of water averaged over the globe.
Formation and migration of water toward cold traps may thus be a continuous
process on the Moon and other airless bodies.