Declining Arctic sea ice may increase wildfires in the western US - & Canada?

-

Nature

Declining sea ice in the Arctic may contribute to increased wildfire activity in the western United States, suggests a modelling study published in Nature Communications. The finding demonstrates the influence that human-induced climate change can have on extreme weather events in the region.

Wildfires in the western US (& Canada) have become more frequent and severe in recent years. Although there is some evidence that Arctic sea ice declines can influence extreme weather conditions in temperate and subtropical regions, the impact on wildfires has been unclear.

Yufei Zou, Hailong Wang and colleagues combined data on wildfire incidence, sea ice concentrations and weather conditions over the past 40 years and conducted model simulations to investigate the relationship between these factors. 

The authors identified an association between declining Arctic sea ice concentrations from July to October and the increasing probability of large wildfires in the western US during the following September to December. The model simulations indicate that declines in Arctic sea ice are linked to air circulation changes that cause hotter and dryer weather conditions, which increase the likelihood of wildfires.

The authors conclude that the influence of Arctic sea ice concentrations on wildfires is of similar magnitude to that of the tropical El Niño Southern Oscillation, which can also modulate regional wildfire conditions. As Arctic sea ice is projected to continuously decline, this could further increase the susceptibility of the western US to wildfires in the future, they suggest.


Comments

Post a Comment

Popular posts from this blog

Conservative MP Absent From a Child Poverty Forum in Southwestern Manitoba.

-
Image
Are hungry kids a priority for the Harper government? by Larry Powell The forum (for the riding of Dauphin - Swan River - Neepawa) was sponsored by the Mission and Services Committee of the Neepawa United Church. It drew about 80 people to the church on Wednesday. But only four of the five candidates (see below) took part in the debate -  Ray  Piché  (Liberal),   Kate Storey (Green Party),  Inky Mark (Ind.) and  Laverne Lewycky (NDP) . The 5th candidate, the sitting Conservative MP for the area, Robert Sopuck (represented by the empty chair on the right), did not attend. His office manager in Neepawa, Christine Waddell, said he was in Inglis, a small community in the western part of the riding for the evening. She did not elaborate. But she did explain that a campaign worker was mistaken when he told forum organizers earlier that Mr. Sopuck would, in fact be there. Piché , the Liberal candidate, said the MP's absence showed “disrespect” for the rest of the candidates
Read more

A Candidate's Forum on Child Poverty Touches a Nerve in Manitoba.

-
Image
by Larry Powell Planet In Peril has sorted through some of the confusion surrounding the absence of Robert Sopuck (above), the Conservative Member of Parliament for Dauphin-Swan River-Neepawa,  from a candidates' forum on child poverty in Neepawa on Wednesday.  About a month ago, his office told forum organizers that he would be attending.  But his office manager in Neepawa, Christine Waddell, later announced he could not attend due to "scheduling conflicts." She said the night of the event, he was in Inglis, a small town in the western part of his riding.  This morning, however, Sopuck himself told PinP he had actually been in Roblin, a larger town just north of Inglis. A newspaper ad indicated it was a "meet and greet" affair. But that was in the morning in Roblin, a town within a 3-hour drive of Neepawa. So it's still not clear what the event in Inglis was which took priority over a candidate's forum. The MP bristled at my suggestion th
Read more

The Bio of Larry Powell - publisher of this blog.

-
Image
Larry Powell Powell is a veteran, award-winning journalist based in Shoal Lake, Manitoba, Canada. He specialize in stories about agriculture and the environment. For decades, he worked for broadcast outlets in all four provinces in western Canada. This included a 5 years stint as Senior Editor for CBC Radio News in Saskatchewan. He is authorized to receive embargoed news releases on important, global stories, through the Science Media Centre of Canada, the Royal Society, Nature Research and the World Weather Attribution Network. He's a member of the Science Writers and Communicators of Canada, the Canadian Association of  Journalists and a past member of the American Association for the Advancement of Science. In 2020, Powell joined an international team of writers providing articles for the Swiss-based online journal, Focusing on Wildlife - celebrating  the biodiversity of Planet Earth. In June, 2014, he was a panelist at a world conference in          Winnipeg entitled Holding
Read more