Constraints on mantle 3He fluxes and deep-sea circulation from an oceanic general circulation model
The steady-state distribution of helium in the deep sea has been simulated to investigate the magnitude and spatial and temporal variability of mantle degassing and to characterize deep-sea circulation and ventilation. The simulation was produced by linking a simple source function for helium inject...
| Published in: | Journal of Geophysical Research: Solid Earth |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1995
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| Subjects: | |
| Online Access: | http://hdl.handle.net/21.11116/0000-0004-F59C-8 http://hdl.handle.net/21.11116/0000-0004-F59E-6 |
| Summary: | The steady-state distribution of helium in the deep sea has been simulated to investigate the magnitude and spatial and temporal variability of mantle degassing and to characterize deep-sea circulation and ventilation. The simulation was produced by linking a simple source function for helium injected at mid-ocean ridges with an oceanic general circulation model (GCM). While the results generally support the GCM's abyssal circulation, the simulation reveals regions of overly-intense lateral diffusion and upwelling in the model, particularly in the equatorial Pacific. Similarly, there appears to be insufficient production of He-ventilated bottom waters in the model Antarctic. These observations suggest that further refinement of the GCM abyssal circulation is required. -from Authors |
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