The North Atlantic: Ground Zero of Global Cooling

Watts Up With That?

Guest essay by David Archibald

The warning signs have been there for some time now – persistent failures of the wheat crop in Norway for example. The North Atlantic is cooling. The cooling trend was evident at the time of an expedition to investigate this phenonemon three years ago. The rate of cooling has now steepened up since then based on the latest data collated by Professor Humlum of the University of Oslo. From that data set, this graph shows the heat loss since 2004 for the top 700 metres of the water column:

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Figure 1: Monthly heat content anomaly in the uppermost 700 metres of the North Atlantic

As Figure 1 show, North Atlantic heat content peaked in 2004. The decline since the peak has been steeper than the rise. What would be the reason for 2004 being the peak year? Part of the answer may be that 2004…

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