SitNews - Stories in the News - Ketchikan, Alaska

Record low level of Bering Sea ice causes profound, widespread impacts

By PAULA DOBBYN

 

December 13, 2019
Friday AM


(SitNews) - Sea ice in the Bering Sea shrank to its lowest levels in recorded history in 2018, profoundly affecting northwest Alaska residents who depend on marine resources for food, cash and culture, according to a new peer-reviewed study.

“This is an extreme event with immediate and long-lasting repercussions. It’s indicative of very rapid change in the entire northern Bering Sea ecosystem. It has ramifications for everyone in the region,” said lead author Rick Thoman, a climate specialist at the Alaska Center for Climate Assessment and Policy at the University of Alaska Fairbanks.

jpg Record low level of Bering Sea ice causes profound, widespread impacts

Sea ice floats in the Bering Strait off Cape Prince of Wales.
Photo by Gay Sheffield

The interdisciplinary paper, “The Record Lower Bering Sea Ice Extent in 2018: Context, Impacts, and an Assessment of the Role of Anthropogenic Climate Change,” was published by the Bulletin of the American Meteorological Society. It’s part of a collection of 21 studies analyzing extreme weather across five continents and one sea, called “Explaining Extreme Events in 2018 from a Climate Perspective.”

Thoman and the researchers used remote sensing, climate modeling, government and academic studies, local observations, and media and public reports to reach their conclusions. They examined Arctic sea ice extent dating back to 1850 and compared it to their study period, January to April 2018.

They found that the maximum daily Bering Sea ice was the lowest on record, and the impacts were widespread, including unprecedented weather events, marine wildlife die-offs, and sightings of animals outside of their normal ranges. The ecological changes included the first documented mass strandings of ice-associated seals, a redistribution of thermally sensitive fish, and a multispecies die-off of seabirds due to starvation.

Persistently warm winter weather contributed to poor ice conditions that resulted in a fatal accident on the Kuskokwim River ice road. Retreating and fractured sea ice during a late February storm led to ice-laden flooding that caused a power outage and infrastructure damage on Little Diomede Island, the study says.

More than 50 reports of unusual events related to weather and marine wildlife were collected by the Local Environmental Observer Network. The researchers attribute the record-low sea ice to human-caused climate change, the symptoms of which include a warmer ocean, later arrival of sea ice and more frequent storms than in the pre-industrial era. These conditions could be typical in less than 20 years, Thoman said.

Thoman’s co-authors at the University of Alaska Fairbanks are Uma S. Bhatt with the Geophysical Institute and International Arctic Research Center; Peter A. Bieniek, Brian Brettschneider, Rick Lader and John Walsh with IARC; Seth L. Danielson with the College of Fisheries and Ocean Sciences; and Gay Sheffield with Alaska Sea Grant and CFOS. Michael Brubaker of the Alaska Native Tribal Health Consortium is also a co-author, as are Zachary Lade of the University of California Irvine, Department of Earth System Science; and Walter N. Meier of the University of Colorado Boulder, National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences.

This article is provided as a public service by the University of Alaska Fairbanks International Arctic Research Center, Alaska Center for Climate Assessment and Policy.

Paula Dobby [ pdobbyn@alaska.edu ] is a writer with UAF Alaska Sea Grant.

Representations of fact and opinions in comments posted are solely those of the individual posters and do not represent the opinions of Sitnews.



Submit A Letter to SitNews

Contact the Editor

SitNews ©2019
Stories In The News
Ketchikan, Alaska

 Articles & photographs that appear in SitNews are considered protected by copyright and may not be reprinted without written permission from and payment of any required fees to the proper freelance writers and subscription services.

E-mail your news & photos to editor@sitnews.us

Photographers choosing to submit photographs for publication to SitNews are in doing so granting their permission for publication and for archiving. SitNews does not sell photographs. All requests for purchasing a photograph will be emailed to the photographer.