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.

A coal plant viewed from above with smoke emitting from towers

Trump is forcing coal plants to stay open. It could cost customers billions

In an unprecedented use of federal authority, President Donald Trump’s administration has invoked emergency powers to force a series of retiring coal plants to stay open.
An illustration of a gas pump pouring gas into a gas tank

How Big Oil pivoted from climate-friendly messaging to normalize dependence on fossil fuels

The world’s biggest oil and gas companies have spent the last four years systematically shifting away from climate-friendly advertising to push a new message: fossil fuels are here to stay.

An image of the earth sitting on top of a gas stove burner

How climate change is redrawing the world’s political map

Climate change is altering geopolitical relationships, as nations compete for resources, redraw strategic priorities, and face new risks tied to energy, food, and water.

A woman sitting in front of a laptop with servers behind her

The AI boom has plunged a small Pennsylvania town into chaos

Data centers will swallow 14 percent of Archbald, P.A., evict a trailer park, and border many residential properties. Who's to blame is a matter of fierce debate.

A view of a mining pit with a river in the foreground

As India expands coal power, a mining town suffers

The people of Jharia, home to India’s largest coal reserves, are fueling the country’s economic growth and getting sick from the ensuing pollution.
Data Center corridor lined with racks and racks of electronics

AI power demand creates ‘high likelihood, high impact’ grid risks

The North American transmission watchdog warns of cascading outages if the largest data centers aren’t regulated.
A depiction of a greener planet, green energy, and green solutions for the planet.

House Democrats want clean energy tax credits back

A new bill would reinstate incentives from the Inflation Reduction Act and provide assistance for consumer electricity costs.
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.