Search Results - "Claire, M.W."

Anaerobic methanotrophy and the rise of atmospheric oxygen by Catling, D.C, Claire, M.W, Zahnle, K.J

“…and seawater sulphate levels rose on the early Earth, AOM would have increasingly throttled the release of methane. We use a biogeochemical model to simulate…”
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Two-billion-year-old evaporites capture Earth's great oxidation by Blättler, C L, Claire, M W, Prave, A R, Kirsimäe, K, Higgins, J A, Medvedev, P V, Romashkin, A E, Rychanchik, D V, Zerkle, A L, Paiste, K, Kreitsmann, T, Millar, I L, Hayles, J A, Bao, H, Turchyn, A V, Warke, M R, Lepland, A

“…Major changes in atmospheric and ocean chemistry occurred in the Paleoproterozoic Era (2.5-1.6 billion years ago). Increasing oxidation dramatically changed…”
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High-frequency fluctuations in redox conditions during the latest Permian mass extinction by Mettam, C., Zerkle, A.L., Claire, M.W., Izon, G., Junium, C.J., Twitchett, R.J.

“…New high-resolution geochemical and sedimentological data from Fiskegrav, East Greenland, reveal fluctuations in marine redox conditions associated with the…”
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Anaerobic nitrogen cycling on a Neoarchaean ocean margin by Mettam, C., Zerkle, A.L., Claire, M.W., Prave, A.R., Poulton, S.W., Junium, C.K.

“…•Isotopes indicate anaerobic nitrogen cycling in shallow Neoarchaean waters.•Negative nitrogen isotopic values suggest partial assimilation of ammonium.•No…”
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Modeling aqueous perchlorate chemistries with applications to Mars by Marion, G.M., Catling, D.C., Zahnle, K.J., Claire, M.W.

“…NASA’s Phoenix lander identified perchlorate and carbonate salts on Mars. Perchlorates are rare on Earth, and carbonates have largely been ignored on Mars…”
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Sulfur and mercury MIF suggest volcanic contributions to Earth’s atmosphere at 2.7 Ga by Zerkle, A.L., Claire, M.W., Di Rocco, T., Grassineau, N.V., Nisbet, E.G., Sun, R., Yin, R.

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High rates of anaerobic methanotrophy at low sulfate concentrations with implications for past and present methane levels by BEAL, E.J, CLAIRE, M.W, HOUSE, C.H

“…Despite the importance of the anaerobic oxidation of methane (AOM) to global biogeochemical cycles, the relationship between sulfate concentration and the rate…”
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