New study reveals Arctic sea ice complicates shipping routes

Melting sea ice in the Canadian Arctic is paradoxically making shipping routes more hazardous due to the movement of centuries-old thick ice, according to recent research.

Bridget Stringer-Holden reports for CBC News.


In short:

  • Melting thinner ice is releasing thick, old ice, creating choke points in the Northwest Passage.
  • The study, reflecting actual ship traffic from 2007-2021, shows increased risk on key routes, despite longer shipping seasons in some areas.
  • Local coastal communities face increased food and supply costs due to shortened shipping seasons and reliance on costly airlifts.

Key quote:

"It's true that the Arctic sea ice in general is showing significant retreat and melting, and will continue to do so, but our new study shows that it's not a simple story."

— Alison Cook, Scottish Association for Marine Science

Why this matters:

Thick ice obstructing Arctic shipping routes poses economic and logistical challenges for coastal communities, increasing their dependence on expensive airlifts. Additionally, this complicates future plans for using the Northwest Passage as a reliable trade route, affecting global shipping logistics.

Group of activists marching , holding a banner that reads "END FOSSIL FUELS NOW."

GOP lawmakers passing bills to shield oil companies from climate lawsuits

Most of the 15 bills being considered are part of a coordinated effort by groups linked to right-wing activist Leonard Leo.
USA flag and Iran flag on cracked wall damage.
Credit: Dilok/BigStock Photo ID: 305909299

As Iran war exposes global dependence on fossil fuels, the biggest emitters are reaping the rewards

Worst polluters hold world’s future in their hands as they benefit from higher fossil fuel prices, but global trends favor renewables.

The facade of the Environmental Protection Agency

These two laws give US EPA the authority to regulate CO2 — if it wants to

Administrator Lee Zeldin says his agency can't regulate greenhouse gases without congressional approval. Some legal experts disagree.
Steel roof beams on a construction site

Data centers are straining the grid. Can they be forced to pay for it?

As backlash grows, a nationwide search is underway for solutions to the AI energy crunch.
Data center in a rural setting of green fields and farmland

Wisconsin town revolts against a Trump-backed data center project

At least four local data center-related measures are set to appear on ballots this year, with the first vote coming Tuesday in Port Washington, Wisconsin.

Dry farm fields with mountains in the background

Forecasters predict and prepare for increased drought and wildfire risk after NOAA climate outlook

After a mild winter and dry spring outlook, here is how Oregon is preparing for the potential of its warmest year on record.

A dry section of the Great Salt Lake with mountains in the background

Facing a hotter climate and drying Great Salt Lake, some families plan to leave Utah

Some Utahns are leaving the state to get away from the drying Great Salt Lake and dust containing heavy metals from its exposed lakebed.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.