Ice and Environmental Conditions 



Introduction 



The 2005 iceberg population in 

 the western North Atlantic was so small 

 that it did not pose a serious threat to 

 transatlantic mariners. Thus, Ice Patrol 

 did not provide daily warnings to 

 mariners. During the ice year, 1 1 icebergs 

 passed into the shipping lanes, placing 

 2005 in a tie with 1924 for the sixth- 

 lightest year in HP's history. This section 

 describes the progression of the ice year 

 and the accompanying environmental 

 conditions. 



The IIP ice year extends from 



October through September. The following 

 month-by-month narrative begins as sea ice 

 started to form along the Labrador coast in 

 early December 2004 and concludes with 1 

 July 2005, when Ice Patrol stopped sending 

 weekly ice-chart and bulletin updates to 

 mariners. The narrative draws from several 

 sources, including the Seasonal Summary 

 for Eastern Canadian Waters, Winter 2004- 

 2005 (Canadian Ice Service, 2005); sea-ice 

 analyses provided by the Canadian Ice 

 Service (CIS) and the U. S. National Ice 

 Center; sea-surface-tempcrature anomaly 

 plots provided by the U. S. National 

 Weather Service's Climate Prediction 



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13 



