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Showing 1–15 of 15 results
Advanced filters: Author: Valier V. Galy Clear advanced filters

  • Particulate black carbon in rivers can have ages of up to 17,000 14C years before it is sequestered in the oceans, according to an inventory of particulate black carbon in 18 rivers across the globe.

    • Alysha I. Coppola
    • Daniel B. Wiedemeier
    • Timothy I. Eglinton
    Research
    Nature Geoscience
    Volume: 11, P: 584-588

  • Particulate organic carbon export from the terrestrial biosphere is primarily controlled by physical erosion, and tectonic and climatic forcing of physical erosion may favour biospheric particulate organic carbon sequestration over silicate weathering as a long-term atmospheric carbon dioxide sink.

    • Valier Galy
    • Bernhard Peucker-Ehrenbrink
    • Timothy Eglinton
    Research
    Nature
    Volume: 521, P: 204-207

  • Observations and samples from the central Himalayas show that a giant rockslide occurring around 1190 ad in the Annapurna massif led to the collapse of an elevated palaeo-summit, illustrating the episodic mode of erosion of the glaciated high relief by mega-rockslides.

    • Jérôme Lavé
    • Cyrielle Guérin
    • Valier Galy
    Research
    Nature
    Volume: 619, P: 94-101

  • The hydrological response to climate forcing during the past 25,000 years varied throughout the Indo-Pacific warm pool region. Marine sediment records suggest that during the Last Glacial Maximum, drying in northeast Borneo did not result in a vegetation shift, whereas the development of a severe dry season on Sumba led to water stress and the expansion of herby vegetation.

    • Nathalie Dubois
    • Delia W. Oppo
    • Braddock K. Linsley
    Research
    Nature Geoscience
    Volume: 7, P: 513-517

  • Using a global database of the radiocarbon content of rivers combining new and published measurements, isotopic mass balance suggests that about 60% of river CO2 emissions are derived from millennial or older carbon sources.

    • Joshua F. Dean
    • Gemma Coxon
    • Robert G. Hilton
    ResearchOpen Access
    Nature
    Volume: 642, P: 105-111

  • Fjords have been hypothesized to be hotspots of organic carbon burial. A global compilation of organic carbon data and sedimentation rates shows that fjords sequester twice as much carbon as other ocean regions.

    • Richard W. Smith
    • Thomas S. Bianchi
    • Valier Galy
    Research
    Nature Geoscience
    Volume: 8, P: 450-453

  • The Ganges–Brahmaputra drainage basin represents one of the largest sources of terrestrial biospheric carbon to the ocean. Radiocarbon analyses suggest that 20% of the carbon exported from this system has an average age of more than 15,000 years.

    • Valier Galy
    • Timothy Eglinton
    Research
    Nature Geoscience
    Volume: 4, P: 843-847

  • A comprehensive organic carbon budget for the Himalayan erosional system is presented, and finds that organic carbon export is controlled by sediment properties and that oxidative loss is negligible during transport and deposition to the ocean. The results indicate that 70 to 85 per cent of the organic carbon is recent organic matter captured during transport, which serves as a net sink for atmospheric carbon dioxide.

    • Valier Galy
    • Christian France-Lanord
    • Fabien Palhol
    Research
    Nature
    Volume: 450, P: 407-410

  • Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges–Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.

    • Christopher J. Hein
    • Muhammed Usman
    • Valier V. Galy
    Research
    Nature
    Volume: 581, P: 63-66

  • Measurements of sediments eroded by the Mackenzie River reveal the widespread export of permafrost-derived biospheric carbon that is several thousand years old, and demonstrate its burial in the Arctic Ocean, suggesting that high-latitude rivers can act as important carbon dioxide sinks.

    • Robert G. Hilton
    • Valier Galy
    • Damien Calmels
    Research
    Nature
    Volume: 524, P: 84-87

  • Human activities have altered the production, transport and fate of mud and associated organic carbon, with important implications for global carbon cycling.

    • Thomas S. Bianchi
    • Lawrence M. Mayer
    • Pierre Regnier
    Reviews
    Nature Geoscience
    Volume: 17, P: 287-297