The conference also heard a gloomy analysis of the way the North Atlantic Ocean is reacting to global warming from Ruth Curry of Woods Hole Oceanographic Institution in Massachusetts. Her new study showed that vast amounts of fresh water more than 20,000 cubic kilometres have been added to the northernmost parts of the ocean over the past 40 years because the Arctic and Greenland ice sheets are melting.
According to Dr Curry, the resulting change in the salinity balance of the water threatens to shut down the Ocean Conveyor Belt, which transfers heat from the tropics towards the polar regions through currents such as the Gulf Stream. If that happened, winter temperatures in northern Europe would fall by several degrees.
The possible failure of the North Atlantic conveyor has been discussed for several years and was fictionalised last year in the film The Day After Tomorrow. Dr Curry said the accumulation of freshwater in the upper ocean layers since the 1990s meant that the risk should be taken seriously. (Financial Times)
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