Volume 11 Issue 1, January 2018

Volume 11 Issue 1

Fresh fjord water from iceberg melt

Iceberg melt is the largest annual freshwater source in a South Greenland fjord, with release largely below 20-m depth, according to iceberg-model simulations. Furthermore, iceberg melt peaks later in the year than other sources of freshwater. The image shows an iceberg in Sermilik Fjord, East Greenland in July 2017.

See Moon et al. (2017)

Image: Dustin Carroll, NASA Jet Propulsion Laboratory. Cover Design: Lauren Heslop

Editorial

  • Editorial |

    Great Earth science has been published over the ten years since the launch of Nature Geoscience. The field has also become more interdisciplinary and accountable, as well as more central to society and sustainability.

Comment

  • Comment |

    The exploration of ocean worlds in the outer Solar System offers the opportunity to search for an independent origin of life, and also to advance our capabilities for exploring and understanding life in Earth’s oceans.

    • Kevin Peter Hand
    •  & Christopher R. German

    Collection:

  • Comment |

    Making sense of exoplanet observations requires better understanding of terrestrial atmospheres in our solar system, especially for Venus. We need to not just intermittently explore, but continuously monitor these atmospheres — like we do for Earth.

    • Kevin McGouldrick

News & Views

  • News & Views |

    A combination of two anoxygenic pathways of photosynthesis could have helped to warm early Earth, according to geochemical models. These metabolisms, and attendant biogeochemical feedbacks, could have worked to counter the faint young Sun.

    • Thomas A. Laakso
  • News & Views |

    Tectonic controls on atmospheric oxygenation are frequently invoked — but whether geochemical records support these ties is an unsettled question.

    • Noah Planavsky
  • News & Views |

    The composition of the oceans is altered by hydrothermal circulation. These chemical factories sustain microbial life, which in turn alters the chemistry of the fluids that enter the ocean. A decade of research details this complex interchange.

    • Susan Q. Lang
  • News & Views |

    The slowdown in surface warming in the early twenty-first century has been traced to strengthening of the Pacific trade winds. The search for the causes identifies a planetary-scale see-saw of atmosphere and ocean between the Atlantic and Pacific basins.

    • Yu Kosaka
  • News & Views |

    The elemental ratios of marine phytoplankton and organic matter vary widely across ocean biomes, according to a catalogue of biogeochemical data, suggesting that climate change may have complex effects on the ocean’s elemental cycles.

    • Tim DeVries
  • News & Views |

    Advances in high-precision isotopic analysis have provided key constraints on the origin and early evolution of the Earth and Moon. Measurements of the isotopes of tungsten provide the most stringent constraints on this history.

    • Kaveh Pahlevan
  • News & Views |

    A compilation of hundreds of palaeoclimate records highlighted the extent of regional variability during the past 2,000 years, and therein the uniqueness of recent warming.

    • Helen McGregor

Perspectives

  • Perspective |

    Ancient hydrothermal deposits formed in the Martian subsurface may be the best targets for finding evidence for ancient life on Mars, and clues about the origin of life on Earth.

    • Joseph R. Michalski
    • , Tullis C. Onstott
    • , Stephen J. Mojzsis
    • , John Mustard
    • , Queenie H. S. Chan
    • , Paul B. Niles
    •  & Sarah Stewart Johnson

Review Articles

  • Review Article |

    Size, morphology, silica content and life cycle of diatoms affect their contribution to the export of carbon to the deep ocean, suggests a literature review.

    • Paul Tréguer
    • , Chris Bowler
    • , Brivaela Moriceau
    • , Stephanie Dutkiewicz
    • , Marion Gehlen
    • , Olivier Aumont
    • , Lucie Bittner
    • , Richard Dugdale
    • , Zoe Finkel
    • , Daniele Iudicone
    • , Oliver Jahn
    • , Lionel Guidi
    • , Marine Lasbleiz
    • , Karine Leblanc
    • , Marina Levy
    •  & Philippe Pondaven

    Collection:

Articles