Deuterium on Mars: The Abundance of HDO and the Value of D/H
- 24 June 1988
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 240 (4860), 1767
- https://doi.org/10.1126/science.240.4860.1767
Abstract
Deuterium on Mars has been detected by the resolution of several Doppler-shifted lines ofHDO near 3.7 micrometers in the planet's spectrum. The ratio of deuterium to hydrogen is (9 ± 4) x 10-4; the abundance of H20 was derived from lines near 1.1 micrometers. This ratio is enriched on Mars over the teiluric value by a factor of6 ± 3. The enrichment implies that hydrogen escaped more rapidly from Mars in the past than it does now, consistent with a dense and warm ancient atmosphere on the planet.Keywords
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