Solar wind contributions to Earth’s oceans

Daly, Luke; Lee, Martin R.; Hallis, Lydia J.; Ishii, Hope A.; Bradley, John P.; Bland, Phillip. A.; Saxey, David W.; Fougerouse, Denis; Rickard, William A.; Forman, Lucy V.; Timms, Nicholas E.; Jourdan, Fred; Reddy, Steven M.; Salge, Tobias; Quadir, Zakaria; Christou, Evangelos; Cox, Morgan A.; Aguiar, Jeffrey A.; Hattar, Khalid; Monterrosa, Anthony; Keller, Lindsay P.; Christoffersen, Roy; Dukes, Catherine A.; Loeffler, Mark J.; Thompson, Michelle S.

doi:10.1038/s41550-021-01487-w

Solar wind contributions to Earth’s oceans

Journal Article · Sun Nov 28 23:00:00 EST 2021 · Nature Astronomy

DOI:https://doi.org/10.1038/s41550-021-01487-w· OSTI ID:1834330

^[1]; Lee, Martin R. ^[2]; ^[2]; ^[3]; Bradley, John P. ^[3]; Bland, Phillip. A. ^[4]; ^[4]; ^[4]; ^[4]; Forman, Lucy V. ^[4]; Timms, Nicholas E. ^[4]; ^[4]; ^[4]; Salge, Tobias ^[5]; Quadir, Zakaria ^[4]; Christou, Evangelos ^[2]; Cox, Morgan A. ^[4]; ^[6]; Hattar, Khalid ^[7]; Monterrosa, Anthony ^[7] more »

Univ. of Glasgow, Scotland (United Kingdom); Curtin Univ., Perth, WA (Australia); Univ. of Sydney, NSW (Australia); Univ. of Oxford (United Kingdom)
Univ. of Glasgow, Scotland (United Kingdom)
Univ. of Hawaii at Manoa, Honolulu, HI (United States)
Curtin Univ., Perth, WA (Australia)
Natural History Museum, London (United Kingdom)
Idaho National Lab. (INL), Idaho Falls, ID (United States); Lockheed Martin Corp., Palo Alto, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
NASA Johnson Space Center, Houston, TX (United States)
Univ. of Virginia, Charlottesville, VA (United States)
Northern Arizona Univ., Flagstaff, AZ (United States)
Purdue Univ., West Lafayette, IN (United States)

The isotopic composition of water in Earth’s oceans is challenging to recreate using a plausible mixture of known extraterrestrial sources such as asteroids—an additional isotopically light reservoir is required. The Sun’s solar wind could provide an answer to balance Earth’s water budget. Here, we used atom probe tomography to directly observe an average ~1 mol% enrichment in water and hydroxyls in the solar-wind-irradiated rim of an olivine grain from the S-type asteroid Itokawa. We also experimentally confirm that H⁺ irradiation of silicate mineral surfaces produces water molecules. These results suggest that the Itokawa regolith could contain ~20 l m^-3 of solar-wind-derived water and that such water reservoirs are probably ubiquitous on airless worlds throughout our Galaxy. The production of this isotopically light water reservoir by solar wind implantation into fine-grained silicates may have been a particularly important process in the early Solar System, potentially providing a means to recreate Earth’s current water isotope ratios.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; UK STFC consortium; National Aeronautics and Space Administration (NASA); Science and Industry Endowment Fund; Australian Research Council

Grant/Contract Number:: NA0003525

OSTI ID:: 1834330

Report Number(s):: SAND--2021-8608J; 697171

Journal Information:: Nature Astronomy, Journal Name: Nature Astronomy Journal Issue: 12 Vol. 5; ISSN 2397-3366

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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