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Showing 1–8 of 8 results
Advanced filters: Author: L. Pichevin Clear advanced filters

  • It has been suggested that the delivery of dust-borne iron to the glacial ocean could have increased primary productivity and enhanced deep-sea carbon export in the Eastern Equatorial Pacific (EEP), lowering atmospheric carbon dioxide concentrations during glacial periods. But lower opal accumulation rates cast doubts on the importance of the EEP for glacial carbon dioxide drawdown. A silicon isotope record now provides support for an invigorated biological pump in this region during the last glacial period that could have contributed to glacial carbon dioxide drawdown.

    • L. E. Pichevin
    • B. C. Reynolds
    • R. M. Ellam
    Research
    Nature
    Volume: 459, P: 1114-1117

  • Marine sediments deposited beneath the eastern Pacific upwelling margin are a substantial sink for silica. The geochemistry of these sediments suggests that periods of intense upwelling result in iron limitation, which enhances the export of silica from the surface to the deep ocean and sediments.

    • L. E. Pichevin
    • R. S. Ganeshram
    • R. Hinton
    Research
    Nature Geoscience
    Volume: 7, P: 541-546

  • Global atmospheric CO2 varies between glacial–interglacial cycles. Here, the authors study these changes using Si records and how the Si flux and ocean circulation changes controlled the global Si distribution across the last deglaciation, based on high-resolution Si-isotope records from the Indian Sector Southern Ocean.

    • M. Dumont
    • L. Pichevin
    • R. Ganeshram
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-11

  • Using palaeohistology and geochemistry, the placental-like life history of a pantodont species 62 million years of age is determined.

    • Gregory F. Funston
    • Paige E. dePolo
    • Stephen L. Brusatte
    Research
    Nature
    Volume: 610, P: 107-111

  • Rare earth elements are used in electronics, but increase in demand could lead to low supply. Here the authors conduct experiments on the International Space Station and show microbes can extract rare elements from rocks at low gravity, a finding that could extend mining potential to other planets.

    • Charles S. Cockell
    • Rosa Santomartino
    • René Demets
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-11

  • The marine nitrogen cycle was altered during the transition from glacial to interglacial conditions. An analysis of δ15N records throughout the world’s oceans suggests that rates of denitrification in the water column accelerated during the last deglaciation.

    • Eric D. Galbraith
    • Markus Kienast
    • Jin-Yu Terence Yang
    Research
    Nature Geoscience
    Volume: 6, P: 579-584

  • Infant gray mouse lemurs performed better when they were born to mothers fed with dairy fat vs. vegetable fat in a set of tasks involving motor synchronization, sensory perception, learning and memory, suggesting an earlier psychomotor and cognitive development.

    • Yohann Chaudron
    • Constance Boyer
    • Fabien Pifferi
    ResearchOpen Access
    Communications Biology
    Volume: 7, P: 1-14