Learn about hotspots in tundras and boreal forests that are releasing higher level of carbon dioxide, altering the carbon balance in the world's coldest regions.
Learn about hotspots in tundras and boreal forests that are releasing higher level of carbon dioxide, altering the carbon balance in the world's coldest regions.Climate change has already begun to instigate environment-altering effects around the world, and the latest evidence is cropping up in arctic regions that are emitting increasing amounts of carbon dioxide.
The researchers wanted to know how the constant breathing of the Earth — in other words, the cycle of CO2 uptake and release that is largely driven by plant photosynthesis and decomposition — has changed in northern latitudes. From 2001 to 2020, the ABZ has generally been increasing as a carbon sink due to increased carbon uptake during summers. This serves the important role of maintaining a balance in the atmosphere’s CO2 levels.
Unlike tundras, the somewhat milder boreal forests are more often experiencing strong carbon uptake due to longer summers, offsetting the non-summer emissions. These regions, though, are still seeing the appearance of more carbon sources as well. Growing carbon sources have been showing up primarily in northern Europe, Canada, Siberia, and central Alaska. Carbon sources are becoming especially prevalent in tundra and boreal environments in Alaska. The researchers say this may be a result of Alaska having rapidly warming autumns and declining autumn snow cover. Accelerated permafrost thaw in the state has also been observed in recent decades.
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