The UKCIP has released an update on its assessment of the Atlantic Meridional Overturning Circulation, often referred to as the THC, based on recent findings. The summary is available here.
Based on the most recent work from the RAPID programme, (Cunningham et. al., Science, August 2007), which was the source of the data presented in the Bryden et. al. paper of 2005 which suggested a 30% slowdown in modern times, the first year’s data from the moorings it has placed confirm the idea that the Bryden results were an anomaly based on short-term variability; in other words, the AMOC appears to have a ‘pulse’, rather than being a ‘smoothly flowing stream’.
The press release also cites Jungclaus et. al. (2006) for North Atlantic freshening from glacial outflow estimates, and bases its conclusions on the outputs of model runs included in the AR4 and completed since, with the…
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