Similar rates of modern and last-glacial ocean thermohaline circulation inferred from radiochemical data
Article Abstract:
The Atlantic 231Pa/230Th ratio indicates that the transport of North Atlantic deep/intermediate water into the circumpolar deep water (CPDW) of the southern ocean occurred at a more intense rate during the last glacial maximum. A low 231Pa concentration in the glacial Atlantic sediments reveals the continuous export of Northern Component Water from the Atlantic Ocean. Holocene sediments exhibit high 231Pa/230Th ratios at the Polar Frontal Zone in the Atlantic and western Indian sectors, indicating that 231Pa exported from the Atlantic is quenched as it reaches the CPDW.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Risk of sea-change in the Atlantic
Article Abstract:
Researchers have undertaken a detailed study which indicates that the rate at which greenhouse gases are pumped into the atmosphere has an impact on ocean circulation stability. Higher concentrations of greenhouses gases can be released into the atmosphere without impact on ocean circulation only if the rate of increase is very slow. It is possible that the thermohaline circulation in the North Atlantic will be disrupted if atmospheric pollution continues at the current rate.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Bifurcations of the Atlantic thermohaline circulation in response to changes in the hydrological cycle
Article Abstract:
The circulation transitions in the North Atlantic ocean reveals that addition of 0.06 sverdrup of freshwater in the catchment areas reduces the deep water circulation. The combination of an integrated global ocean circulation model and an atmospheric model is effective in calculating the required freshwater input. Small freshwater changes causes depletion in the regional convection. Vigorous changes in the regional surface temperature follow.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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