Tag Archives: Dave Hebert
Waters off Scotian Shelf are cooling while scientists wonder if decade-long warming trend is over
In recent years, warming temperatures have grabbed headlines, with record highs being set throughout the region. Recently, on the Scotian shelf, it has moved in the other direction. “It is really interesting,” Beazley said in a wharfside interview at the Bedford Institute of Oceanography. “We did see a continuation of the trend that we observed in 2023, which was the temperatures are actually returning to normal or even below normal conditions in some areas. It’s getting cooler.” Since 2012, ocean temperatures off Nova Scotia at depth have been consistently warmer — by about two degrees above normal. more, >>CLICK TO READ<< 09:29
Warming trend continues in waters off Atlantic Canada
Warmer ocean temperatures off Atlantic Canada continued in 2016, maintaining a trend that started earlier this decade, according to survey results from Canada’s Department of Fisheries and Oceans. On the Scotian Shelf off Nova Scotia, temperatures last year were as high as three degrees above the 30-year average used to establish climatic norms. “It’s not quite the same [record] level of 2012, but it’s getting close to it,” said Dave Hebert, a research scientist with DFO. He added that 2016 was probably the second warmest year on record. Scientists have struggled to explain what is causing the most intriguing aspect of the recent trend: the warming of ocean bottom water, which is not influenced by surface weather events. Hebert said the latest theory is based on model results that see the Gulf Stream moving northward and intersecting with the tail of the Grand Banks. “That is stopping the cold Labrador Sea water from coming around the tail of the Grand Banks,” he said. “That’s where we normally get the cold water that refreshes the [Scotian] Shelf. That hasn’t been happening. Read the story here 16:48
