Wildfire Ponzi Scheme? The Continental Carbon Exchange

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Wildfire in Alaskan black spruce forests.

If carbon is currency, wildfires are the brokers; that is, they distribute carbon between land and air. In the short-run, fire emits carbon dioxide into the atmosphere. Over time, it also strengthens subsequent carbon uptake through plant regrowth. This exchange is like a natural Ponzi scheme – the carbon offsets from yesterday’s fires take up today’s emissions…. Read more »

Fire-driven Changes to Gap Regeneration

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Arctic wildfire

Interior Alaska: black spruce and mosses as far as the eye can see. New research suggests that image may change dramatically over the next century. As the intensity of fires in interior Alaska increases, forest regrowth is shifting from spruce to deciduous species such as trembling aspen and Alaska paper birch. But intense fires also… Read more »

Shaping the Alaskan Forest. Canopy-down or forest-floor-up?

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white spruce forest in Alaska

While Florida, Texas, and Puerto Rico recover from a devastating hurricane season, another natural disaster rages on the other side the continent. Following a record-hot summer and dry conditions, the northwestern United States and Canada have experienced one of the most intense fire seasons on record. As global temperatures rise, scientists will need a better… Read more »

Arctic Communities See Access Challenges Ahead

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Climate-change is predicted to have a larger impact on Arctic regions than on temperate ecosystems. As a result, rural communities relying on local wild resources, or subsistence harvesting, are vulnerable to climate-change-induced environmental trends affecting the availability of fish, waterfowl, and other key resources.

The Spruce and the Hare: Backing Up Leopold’s Intuition

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snowshoe hare

Snowshoe hares prefer many other plants to white spruce seedlings, but when the population of hares skyrockets—as it does about once a decade—they can decimate even a bumper crop of spruce seedlings. Researchers with the Bonanza Creek LTER reconstructed over 40 years of browsing history by analyzing the age and browse scars of thousands of seedlings and saplings at 18 locations on the floodplain of Alaska’s Tanana River.

Fire and ice: Carbon cycling feedbacks to climate in a warming Arctic

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Arctic wildfire

Talk Description: About 30% of global carbon stocks reside in the vegetation and deep, carbon-rich soils of Arctic tundra and boreal forest biomes. Wildfires—which are becoming more frequent with warmer and drier weather in the Arctic—have the potential to either stabilize or accelerate regional and global warming through carbon feedbacks. By comparing the impact of… Read more »

Beyond Citizen Science: Local Observations of Climate Change Impacts Guide Vulnerability Research

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sled dogs pull supplies over bare patch of ground

Unstable ice. Raging rivers. Fire-scorched landscapes. Deep within Alaska’s Yukon River Basin, residents faced with these obstacles during travel or hunting trips now use camera-enabled GPS units to send photographs to researchers across the state. Scientists at the Bonanza Creek LTER and University of Alaska, Fairbanks are using the images, along with the associated GPS… Read more »