Ecological impact on Canada’s Arctic coastline linked to global climate change
Scientists from Queen’s and Carleton universities head a national multidisciplinary research team that has uncovered startling new evidence of the destructive impact of global climate change on North America’s largest Arctic delta.
“One of the most ominous threats of global warming today is from rising sea levels, which can cause marine waters to inundate the land,” says the team’s co-leader, Queen’s graduate student Joshua Thienpont. “The threat is especially acute in polar regions, where shrinking sea ice increases the risk of storm surges.”
By studying growth rings from coastal shrubs and lake sediments in the Mackenzie Delta region of the Northwest Territories – the scene of a widespread and ecologically destructive storm surge in 1999 – the researchers have discovered that the impact of these salt-water surges is unprecedented in the 1,000-year history of the lake.
“This had been predicted by all the models and now we have empirical evidence,” says team co-leader Michael Pisaric, a geography professor at Carleton. The Inuvialuit, who live in the northwest Arctic, identified that a major surge had occurred in 1999, and assisted with field work.