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The warm currents from the tropics that sweep north along the eastern
coast of the US and Canada have slowed 30% since 1992. The change may presage colder winters for the north-east of North America and Europe. Not to mention the more violent storms the extra heat in the mid-lattitude atmosphere will create. Extract: "The Atlantic conveyor carries deep cold water from the Arctic down south to the equator and returns to the north warm water, which is close to the surface." "If the Atlantic Ocean is moving less heat northwards, then the atmosphere must take up the slack to keep the tropics-to-poles system balanced. McBean said the most likely way for this to happen would be an increase in violent storms in the area from the mid-United States to mid-Canada." ....... Disruption of the Atlantic conveyor had been widely predicted. A report from the U.S. defence department earlier this year noted the consequences of a slowdown in the Atlantic conveyor, saying that the climate of Britain and northern Europe would be more like Siberia's and the average rainfall would decline by 30 per cent. But yesterday's report conducted by a research team from Britain's National Oceanography Centre found the first hard evidence for the change after comparing temperature and salinity readings from last year to four previous snapshots dating back to 1957 ? all recorded by monitoring devices along a line from Morocco to Miami. Measurements in 1981 and 1992 had shown little change from the readings of 1957. ............ http://www.thestar.com/NASApp/cs/Con...=thestar/Layou... |
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