Soil organic matter (SOM) is the largest actively cycling reservoir of terrestrial carbon (C),
and the majority of SOM in Earth's mineral soils (~ 65%) is mineral‐associated organic …

The physical and chemical changes that accompany permafrost thaw directly influence the
microbial communities that mediate the decomposition of formerly frozen organic matter …

Our current 1.1° C warmer world is already affecting natural and human systems in Europe
(very high confidence1). Since AR5, there has been a substantial increase in detected or …

Pristine wetlands have high potential for mitigating climate change because of their large
carbon stocks. However, whether and where wetlands will act as a greenhouse gas sink or …

Arctic regions are disproportionately affected by atmospheric warming, with cascading
effects on multiple surface processes. Atmospheric warming is destabilizing permafrost …

Arctic‐boreal landscapes are experiencing profound warming, along with changes in
ecosystem moisture status and disturbance from fire. This region is of global importance in …

Warming induced shifts in tundra vegetation composition and structure, including
circumpolar expansion of shrubs, modifies ecosystem structure and functioning with …

Wildfire activity in Arctic and boreal regions is rapidly increasing, with severe consequences
for climate and human health. Regional long-term variations in fire frequency and intensity …

Warming of northern high latitude regions (NHL,> 50° N) has increased both photosynthesis
and respiration which results in considerable uncertainty regarding the net carbon dioxide …

The summers of 2019, 2020, and 2021 experienced unprecedented fire activity in
northeastern Siberia, driven by record high spring and summer temperatures. Many of these …