Earth Protect Blog

Change has impact on water quality, transportation in remote areas

By Brittany Peterson

The Associated Press

GRAND LAKE » With a backdrop of mountain vistas and a rink of natural ice, the annual hockey tournament at Grand Lake offers a picturesque snapshot of Colorado’s beauty. What’s not apparent is the problem brewing under players’ skates.

This year’s tournament was held a month later than normal, with thin ice forcing organizers to postpone the event originally scheduled for the third weekend of January.

“We had slushy conditions and less than 6 inches of ice. There just was no way it could safely be held,” said Steve Kudron, mayor of Grand Lake.

That is a reality that many communities that live near lakes, which freeze and provide myriad activities during winter months, are increasingly confronting. According to a major U.N. report on climate released on Monday, as the planet warms, the amount of ice, and amount of time it keeps a body of water solid, are diminishing. Those changes are forcing communities to adapt and curtail some winter activities while also raising the spectre of long-term environmental and health issues.

Sapna Sharma, an aquatic ecologist at Toronto’s York University, analyzed 100 to 200 years of data for 18 North American lakes, finding that in the past 25 years, “we’re losing ice six times faster than the historical average.” Air temperature, particularly in winter, is the most significant driver of lake ice, she said.

In addition to shorter ice seasons, so-called “winter weirding events” are becoming more widespread, Sharma said.

“You’ll have really cold days and some warm days with rainfall and cold days again and some more rain and the melting of snow,” she said. “That’s exactly the type of winter we’re having in Toronto right now.”

Some impacts of climate change can be addressed through efforts such as building fire-resistant homes. But there are no simple solutions for preserving lake ice.

According to handwritten records maintained by Northern Water, a major water provider for northeastern Colorado, the past 20 years at Grand Lake saw a shorter ice season by about 14 days than the prior 20-year period. There, November’s air temperature has warmed on average about 5 degrees Fahrenheit, according to data by the National Oceanic and Atmospheric Administration. This past November was the secondhottest on record.

David Gochis, a hydrometeorologist at the National Center for Atmospheric Research, says Colorado’s trend of very hot summers and last year’s unseasonably warm fall combined to raise the lake’s water temperature, contributing to a delayed and gradual freeze.

That meant the hockey tournament in Grand Lake had to be pushed back, already a sign of community adaptation.

“Moving forward, I would schedule it the last weekend in January at the earliest, just to make sure in case we have another year like this,” said organizer Brian Blumenfeld.

Beyond the hit to recreation activities and economic impacts, longer open water periods will affect “quality and quantity of downstream water resources,” according to a 2021 study from the University of Colorado. “When a lake is frozen, it’s not evaporating water,” said Adam Jokerst, a water manager for Greeley.

Additionally, warm, stagnant water can provide prime conditions for algal blooms, which can be toxic to humans and animals, according to the Environmental Protection Agency.

The warming temperatures are having an impact on lake communities around North America.

Lynnette Warren has led fishing groups around Alaska for 46 years. At popular ice fishing lakes across the Matanuska-Susitna Borough north of Anchorage, this year’s warmer temperatures melted the snow, resulting in a chain reaction. The water weighed down the ice. The ice weakened. More water seeped up through cracks. Fishers avoided those lakes, and congregated on the handful of viable ones.

“When those lakes are the ones people are fishing all the time, then the catching opportunities are highly reduced because those lakes are overfished,” Warren said.

In parts of Alaska and Northern Canada, frozen lakes and rivers also serve a critical role connecting remote, often indigenous communities that are inaccessible by road. Without the ice, residents cannot access outside goods and services except by plane or boat.