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Sun T, Socki RA, Bish DL, et al. Lost cold Antarctic deserts inferred from unusual sulfate formation and isotope signatures. Nat Commun. 2015;6:7579doi: 10.1038/ncomms8579.
Sun, T., Socki, R. A., Bish, D. L., Harvey, R. P., Bao, H., Niles, P. B., Cavicchioli, R., & Tonui, E. (2015). Lost cold Antarctic deserts inferred from unusual sulfate formation and isotope signatures. Nature communications, 67579. https://doi.org/10.1038/ncomms8579
Sun, Tao, et al. "Lost cold Antarctic deserts inferred from unusual sulfate formation and isotope signatures." Nature communications vol. 6 (2015): 7579. doi: https://doi.org/10.1038/ncomms8579
Sun T, Socki RA, Bish DL, Harvey RP, Bao H, Niles PB, Cavicchioli R, Tonui E. Lost cold Antarctic deserts inferred from unusual sulfate formation and isotope signatures. Nat Commun. 2015 Jun 29;6:7579. doi: 10.1038/ncomms8579. PMID: 26119082.
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Nat Commun. 2015 Jun 29;6:7579. doi: 10.1038/ncomms8579.

Lost cold Antarctic deserts inferred from unusual sulfate formation and isotope signatures.

Nature communications

Tao Sun, Richard A Socki, David L Bish, Ralph P Harvey, Huiming Bao, Paul B Niles, Ricardo Cavicchioli, Eric Tonui

Affiliations

  1. 1] Louisiana State University, Baton Rouge, Louisiana 70803, USA [2] NASA Johnson Space Center, Houston, Texas 77058, USA.
  2. ESCG, NASA Johnson Space Center, Houston, Texas 77058, USA.
  3. Indiana University, Bloomington, Indianapolis 47405, USA.
  4. Case Western Reserve University, Cleveland, Ohio 44106, USA.
  5. Louisiana State University, Baton Rouge, Louisiana 70803, USA.
  6. NASA Johnson Space Center, Houston, Texas 77058, USA.
  7. University of New South Wales, Sydney, New South Wales 2052, Australia.
  8. Upstream Technology, BP America, Houston, Texas 77079, USA.

PMID: 26119082 DOI: 10.1038/ncomms8579

Abstract

The Antarctic ice cap significantly affects global ocean circulation and climate. Continental glaciogenic sedimentary deposits provide direct physical evidence of the glacial history of the Antarctic interior, but these data are sparse. Here we investigate a new indicator of ice sheet evolution: sulfates within the glaciogenic deposits from the Lewis Cliff Ice Tongue of the central Transantarctic Mountains. The sulfates exhibit unique isotope signatures, including δ(34)S up to +50‰ for mirabilite evaporites, Δ(17)O up to +2.3‰ for dissolved sulfate within contemporary melt-water ponds, and extremely negative δ(18)O as low as -22.2‰. The isotopic data imply that the sulfates formed under environmental conditions similar to today's McMurdo Dry Valleys, suggesting that ice-free cold deserts may have existed between the South Pole and the Transantarctic Mountains since the Miocene during periods when the ice sheet size was smaller than today, but with an overall similar to modern global hydrological cycle.

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