Nature Geoscience - CURRENT ISSUE : May 2008 - Vol 1 No 5
- Long-term carbon balance
- Submarine groundwater discharge: Atlantic ocean budget
- Hikurangi subduction zone: Slow slip at low temperature
- Ocean radicals: Halides to halogens
LATEST CONTENT
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Fluid flux from overlapping plates
Letter by Nakamura et al.
Overlapping subduction of the Pacific and Philippines Sea plates leads to an enhanced fluid flux to the mantle source of arc volcanoes in central Japan. Spatial variability in the amount of fluid that each plate contributes is determined by the configuration of the subducting plates.
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Rapid erosion of fjords
Letter by Kessler et al.
Fjords line mountainous continental margins where icesheets and glaciers once stood. A two-dimensional model simulation suggests that fjords can be eroded within one million years, primarily in response to topographic ice steering and erosion from ice discharge. Subsequent glaciers that form on these landscapes are smaller and exhibit greater responses to climate change.
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Where glaciers cut deep
News and Views by Kleman
Stunning images of fjords are familiar to geologists, but their origins are less well known. A simple model suggests that topographic steering of ice and erosion proportional to ice discharge are sufficient to explain fjord formation during the Quaternary period.
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Magnetic field reversals
Letter by Biggin et al.
Reconstructions of palaeosecular variation suggest that the Earth's magnetic field reversed less frequently 2.82 to 2.45 billion years ago, relative to the Cenozoic era. This suggests a long-term trend of decreasing geodynamo stability since the Archaean eon.
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