Smoke from the wildfires stretches across the Atlantic Ocean to Norway.

Smoke from wildfires in Canada that has covered large parts of North America this week, causing dangerous breathing conditions, was expected to pass over Norway on Thursday but not cause problems for people there, environmental officials said.

Scientists at the Institute for Climate and Environmental Research in Norway used prediction models to predict how the smoke from the hundreds of wildfires burning across Canada would move through the atmosphere.

Since June 1, smoke has moved over Greenland and Iceland, and observations in southern Norway have confirmed increasing concentrations of aerosols.

“Maybe we can see some haze or smell smoke,” Nikolaos Evangeliou, a senior scientist at the institute, said in a statement. “However, we do not believe that the number of particles in the air here in Norway will be large enough to be harmful to our health.”

In addition to causing health problems for sensitive groups, such as people with lung problems, smoke particles can also have a negative impact on global warming, the institute said.

Smoke and soot particles that settle on ice and snow-covered surfaces, such as the Greenland ice sheetcan darken the surface, causing it to absorb solar radiation and thus contribute to the warming of the atmosphere.

“Overall, from current forecasts we see that the plume will arrive weakly in Europe in the coming days,” said Mr. Gospel Thursday. “However, if these fires continue to generate more smoke every day, the situation could worsen. Nevertheless, the chance that there will be a serious effect on air quality is small.”