Climate & Environment

The Arctic is warming at approximately four times the global average rate. This is the most rapid environmental transformation occurring anywhere on the planet, and it is reshaping every aspect of life and ecology in the North. For the Grays Bay Road and Port Project, climate change is simultaneously an enabler (longer shipping seasons, increased strategic interest) and a threat (permafrost instability, stressed ecosystems). This duality makes the environmental dimension of the project particularly complex.

Permafrost Thaw

Permafrost, ground that remains frozen for at least two consecutive years, underlies the entire Grays Bay project area. In the Kitikmeot region, this permafrost is continuous, extending from near the surface to depths of several hundred metres. It has been frozen for thousands of years. It is now thawing.

Permafrost thaw manifests in several ways:

• Active layer deepening: The seasonal thaw layer at the surface is getting deeper, changing drainage patterns and vegetation.
• Thermokarst: Thawing of ice-rich permafrost creates subsidence features, sinkholes, and new lakes as the ground collapses into the void left by melted ice.
• Infrastructure damage: Buildings, roads, and runways built on permafrost can be destabilized as their foundations thaw. Communities across the Arctic are experiencing cracking buildings, buckled roads, and damaged water and sewer infrastructure.
• Coastal erosion: Permafrost coasts are eroding rapidly as the frozen ground is exposed to wave action during longer ice-free periods. Some Arctic coastlines are retreating by metres per year.

For the Grays Bay road, permafrost thaw is a primary engineering concern. The road must be designed to maintain the frozen state of underlying permafrost or to tolerate some degree of thaw settlement. Climate projections over the road's design life (typically 50-75 years) indicate continued warming, meaning the thermal conditions at construction will be significantly different from those decades later.

The Inuvik-Tuktoyaktuk Highway was engineered to account for this by building thick insulating embankments. The same approach would be used for the Grays Bay road, though the specific permafrost characteristics along the route (ice content, soil type, thermal regime) will determine the engineering requirements.

The Caribou Crisis

The Bathurst caribou herd is one of the most dramatic examples of wildlife population decline in the Arctic. From an estimated 400,000 animals in the 1990s, the herd has collapsed to fewer than 4,000, a decline of more than 99%. A harvest moratorium has been in place in the Northwest Territories, but the herd's trajectory remains bleak.

The causes of the decline are multiple and interacting:

• Climate change: Warmer temperatures increase the frequency of rain-on-snow events, which create ice layers that lock away the lichen caribou depend on for winter forage. Warmer summers increase insect harassment, reducing feeding time and body condition.
• Habitat disturbance: Mining exploration and development, along with associated roads and human activity, have increased across the Bathurst range. Caribou are sensitive to disturbance and will avoid areas near roads and mines.
• Predation: Wolf populations have remained relatively stable while caribou have declined, increasing the predation rate per caribou.
• Vegetation changes: As the Arctic warms, shrub growth increases, shading out the lichens that caribou depend on. Arctic greening, while appearing positive, actually degrades caribou habitat.

The proposed Grays Bay road passes through or near areas used by the Bathurst herd for calving, post-calving, and seasonal migration. Adding a permanent road and associated truck traffic to a herd already in crisis raises legitimate concerns about whether the additional disturbance could push the population past a recovery threshold.

The Dolphin and Union caribou herd, which migrates between Victoria Island and the mainland across Dolphin and Union Strait, also faces challenges. Climate change is affecting the ice conditions on which this marine crossing depends. Later freeze-up and earlier breakup narrow the safe crossing window, and thinner ice increases the risk of caribou breaking through.

Sea Ice Decline

Arctic sea ice has declined dramatically in both extent and thickness. Summer minimum ice extent has decreased by roughly 40% since satellite measurements began in 1979. Multi-year ice, the thick, old ice that was once the dominant type, has largely disappeared from many areas.

In the Coronation Gulf, the practical effect is a longer open-water season. Breakup is occurring earlier in summer and freeze-up is happening later in fall, extending the window for ship navigation. This trend directly benefits the economics of a seasonal port at Grays Bay.

However, the relationship between less ice and easier shipping is not straightforward. As the overall ice pack diminishes, individual years can still produce heavy ice conditions in specific locations as wind and currents redistribute remaining ice. The decline in multi-year ice means there is less extremely thick ice, but moving pack ice remains a hazard that can close channels quickly.

Marine Ecosystem Changes

Warming waters and declining ice cover are altering the marine ecosystem of the Coronation Gulf and the broader Arctic. Changes include:

• Shifting species ranges: Some sub-Arctic fish species are moving northward into waters that were previously too cold.
• Changed productivity: Longer ice-free periods increase light availability for phytoplankton production, but also alter the timing of seasonal blooms that support the entire food web.
• Ocean acidification: Cold Arctic waters absorb CO2 more readily, leading to faster acidification, which threatens shell-forming organisms at the base of the marine food chain.
• Seal and polar bear habitat: Ringed seals, the primary prey of polar bears, depend on stable ice for pupping. Changes in ice conditions affect seal reproduction and, consequently, polar bear populations.

Introducing a deep-water port and associated shipping traffic into this already changing marine environment adds another stressor. The cumulative effect of climate change and industrial activity is a central concern in the environmental review process.

The Development-Protection Tension

The Grays Bay project crystallizes a tension that exists across the Arctic: the environment is changing regardless of what humans do, but human activity can either accelerate or mitigate those changes. Building a road and port in a sensitive area during a period of rapid environmental change is inherently risky. Not building it means the mineral wealth remains locked away, the region remains isolated, and the communities continue to bear the costs of that isolation.

There is no objectively correct resolution to this tension. Reasonable people disagree about where the balance should lie. The environmental review process is the mechanism through which these competing values are supposed to be weighed. Whether that process, as structured, is adequate to the task is itself a matter of legitimate debate, as the Oceans North legal challenge illustrates.

What is not debatable is the scientific reality: the Arctic is changing faster than any engineered project can adapt to, and the decisions made now about infrastructure in the North will have consequences that last for generations in an environment that has very little capacity to absorb mistakes.