When ice-rich permafrost thaws, former tundra and forest turns into a thermokarst lake as the ground subsides. The carbon stored in the formerly frozen ground is consumed by the microbial community, who release methane gas. When lake ice forms in the winter, methane gas bubbles are trapped in the ice.
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Methane bubbles trapped in thermokarst lake ice
When ice-rich permafrost thaws, former tundra and forest turns into a thermokarst lake as the ground subsides. The carbon stored in the formerly frozen ground is consumed by the microbial community, who release methane gas. When lake ice forms in the winter, methane gas bubbles are trapped in the ice.
Winter Snows in Canada
First snowfall of the coming winter in the mountains of Western Canada.
First snowfall of the coming winter in the mountains of Western Canada.
Winter Snows in Canada's Forests and Mountains
First snowfall of the coming winter in the mountains of Western Canada.
First snowfall of the coming winter in the mountains of Western Canada.
Winter Snows in Canada's Forests and Mountains
Snow-capped ridge in the mountains of Western Canada surrounded by coniferous forest.
Snow-capped ridge in the mountains of Western Canada surrounded by coniferous forest.
Autumn Aspens, Mountains, and Evergreens
Autumn in the Canadian Rockies.
Autumn Aspens, Mountains, and Evergreens
Aspens, larches, and a coniferous forest in the Canadian Rockies.
Aspens, larches, and a coniferous forest in the Canadian Rockies.
Winter Snows in Canada's Forests and Mountains
First snowfall of the coming winter in the mountains of Western Canada.
First snowfall of the coming winter in the mountains of Western Canada.
Autumn Aspens, Mountains, and Evergreens
Autumn in the Canadian Rockies.
Winter Snows in Canada's Forests and Mountains
First snowfall of the coming winter in the mountains of Western Canada.
First snowfall of the coming winter in the mountains of Western Canada.
Winter Snows in Canada's Forests and Mountains
First snowfall of the coming winter in the mountains of Western Canada.
First snowfall of the coming winter in the mountains of Western Canada.
Autumn Colors and Canadian Larches
Autumn foliage on a rocky slope of the Canadian Rockies.
Autumn foliage on a rocky slope of the Canadian Rockies.
Conifers, Mountains, and Geology in Western Canada
Conifers, Mountains, and Geology in Western CanadaClouds, conifers, and geology in the Rocky Mountains of Western Canada.
Conifers, Mountains, and Geology in Western Canada
Conifers, Mountains, and Geology in Western CanadaClouds, conifers, and geology in the Rocky Mountains of Western Canada.
Conifers, Mtns, and Geology in Western Canada
Clouds, conifers, and geology in the Rocky Mountains of Western Canada.
Clouds, conifers, and geology in the Rocky Mountains of Western Canada.
Autumn in the Canadian Rockies
Autumn foliage around a lake in the Rocky Mountains of Canada.
Autumn foliage around a lake in the Rocky Mountains of Canada.
Autumn Foliage in the Canadian Rockies
Lakeside trail in the Canadian Rockies surrounded by autumn foliage.
Lakeside trail in the Canadian Rockies surrounded by autumn foliage.
Autumn Foliage Beside a Mountain Lake
Lake in the Canadian Rockies surrounded by autumn foliage.
Lake in the Canadian Rockies surrounded by autumn foliage.
Autumn Colors Beside a Mountain Lake
Lake in the Canadian Rockies surrounded by autumn foliage.
Lake in the Canadian Rockies surrounded by autumn foliage.
Conifers, a Meadow, and a Glacier in Western Canada
Conifers, a Meadow, and a Glacier in Western CanadaGlacier hanging above a mountain meadow and a coniferous forest in the Rocky mountains of Western Canada.
Conifers, a Meadow, and a Glacier in Western Canada
Conifers, a Meadow, and a Glacier in Western CanadaGlacier hanging above a mountain meadow and a coniferous forest in the Rocky mountains of Western Canada.
Autumn Colors Beside a Canadian Lake
Lake in the Canadian Rockies surrounded by autumn foliage.
Lake in the Canadian Rockies surrounded by autumn foliage.
Lava Flow From Fissure Eruption on Kilauea Volcano's East Rift Zone
Lava Flow From Fissure Eruption on Kilauea Volcano's East Rift ZoneA new fissure eruption in September 2011 on the east flank of Pu‘u ‘Ō‘ō on Kīlauea Volcano's east rift zone reminds us of the need to be aware of our ever-changing volcanic environment on Hawai‘i Island. The fissure—the source of the lava flow—is shown in this image. Pu‘u ‘Ō‘ō cone and crater are in the background. Aerial view is to the southwest.
Lava Flow From Fissure Eruption on Kilauea Volcano's East Rift Zone
Lava Flow From Fissure Eruption on Kilauea Volcano's East Rift ZoneA new fissure eruption in September 2011 on the east flank of Pu‘u ‘Ō‘ō on Kīlauea Volcano's east rift zone reminds us of the need to be aware of our ever-changing volcanic environment on Hawai‘i Island. The fissure—the source of the lava flow—is shown in this image. Pu‘u ‘Ō‘ō cone and crater are in the background. Aerial view is to the southwest.
Conifers and Mountains in Western Canada
Mountains of Western Canada overlooking an extensive coniferous forest and young trees.
Mountains of Western Canada overlooking an extensive coniferous forest and young trees.