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Showing 1–13 of 13 results
Advanced filters: Author: Ariel D. Anbar Clear advanced filters

  • Substantial nitrogen fixation at sub-nanomolar molybdenum concentrations without alternative nitrogenases, with important implications for early Earth primary productivity, according to results from a ferruginous, low-sulfate, low-Mo, cyanobacteria-dominated lake.

    • Zackry Stevenson
    • Dylan L. Schultz
    • Elizabeth D. Swanner
    ResearchOpen Access
    Communications Earth & Environment
    P: 1-8

  • To explain why our planet is habitable, geoscientists studying Earth’s surface and interior must work with each other and with communications scholars, write Ariel D. Anbar, Christy B. Till and Mark A. Hannah.

    • Ariel D. Anbar
    • Christy B. Till
    • Mark A. Hannah
    Comments & Opinion
    Nature
    Volume: 539, P: 25-27

  • The photosynthetic production of oxygen in the ocean is thought to have begun at least 2.7 billion years ago. The geochemistry of marine sediments deposited 2.6 billion years ago suggests that ocean margins were oxygenated at least 100 million years before the first significant increase in atmospheric oxygen concentrations.

    • Brian Kendall
    • Christopher T. Reinhard
    • Ariel D. Anbar
    Research
    Nature Geoscience
    Volume: 3, P: 647-652

  • Data are presented that support the idea of an oxygenation event in the immediate aftermath of the Marinoan glaciation, pre-dating previous estimates for post-Marinoan oxygenation by more than 50 million years.

    • Swapan K. Sahoo
    • Noah J. Planavsky
    • Ganqing Jiang
    Research
    Nature
    Volume: 489, P: 546-549

  • Zinc is a marine nutrient that may have been limited in the early oceans. Estimates of marine zinc availability through time suggest that values were instead near-modern during the Proterozoic eon.

    • Clint Scott
    • Noah J. Planavsky
    • Timothy W. Lyons
    Research
    Nature Geoscience
    Volume: 6, P: 125-128

  • The early Earth’s atmosphere had very low oxygen levels for hundreds of millions of years, until the 2.4 Ga Great Oxidation Event, which remains poorly understood. Here, the authors show that reducing Archean volcanic gases could have prevented atmospheric O2 from accumulating, and therefore mantle oxidation was likely very important in setting the evolution of O2 and aerobic life.

    • Shintaro Kadoya
    • David C. Catling
    • Ariel D. Anbar
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-9

  • Marine photic zone euxinia was likely an important kill mechanism and obstacle to recovery during the end-Permian mass extinction alongside the dominant influence of volcanism, according to a global box model evaluated against mercury isotopes from the Meishan Section, China

    • Ruoyu Sun
    • Yi Liu
    • Wang Zheng
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 4, P: 1-11