A5075795399- Climate change and permafrost
- Indigenous Studies and Ecology
- Polar Research and Ecology
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Landslides and related hazards
Stockholm University
2021-2024
Arctic tundra landscapes are highly complex and rapidly changing due to the warming climate. Datasets that document spatial temporal variability of landscape needed monitor rapid changes. Synthetic Aperture Radar (SAR) imagery is specifically suitable for monitoring Arctic, as SAR, unlike optical remote sensing, can provide time series regardless weather illumination conditions. This study examines potential seasonal backscatter mechanisms in environments improving land cover classification...
Soil organic carbon (SOC) in Arctic coastal polygonal tundra is vulnerable to climate change, especially soils with occurrence of large amounts ground ice. Pan-arctic studies mapping SOC exist, yet they fail describe the high spatial variability storage permafrost landscapes. An important factor landscape history which determines landform development and consequently SOC. Our aim was map stocks, environmental variables that determine SOC, two adjacent areas along Canadian Beaufort Sea coast...
Permafrost soils are particularly vulnerable to climate warming. With ~1,500 Gt Carbon (C), they store a significant proportion of global soil C. Organic matter that was frozen and thus unavailable for microbial decomposition millennia, is now thawing. How much this permafrost C decomposed will be determined by activities the partitioning assimilated growth (potential stabilization) or respiration (C loss). Our current knowledge on controls in is, however, limited. The...
The Arctic warms four times faster than the global average, resulting in widespread permafrost thaw. Organic matter that was stored permanently frozen soil for up to millennia now becomes available microbial decomposition. Warming might also alter community composition and physiology thus change decomposition potential of soils. Our current knowledge about organic (SOM) is limited, particularly regard heterogeneity landscapes, hampering our ability predict possible feedbacks climate change....
As permafrost thaw accelerates due to global warming, it may create new transport pathways for chemicals and alter the distribution patterns of legacy contaminants. Correlation with Carbon content jointly landscape analysis offers a promising approach quantifying mapping organic contaminants in Canadian substrate. The present study investigates Polycyclic Aromatic Hydrocarbons (PAHs) Polychlorinated Biphenyls (PCBs) relation ice-wedge polygon soil properties coastal tundra catchment. Soils...
<p>Climate change threatens the Earth’s biggest terrestrial organic carbon reservoir: permafrost soils. With climate warming, frozen soil matter may thaw and become available for microbial decomposition subsequent greenhouse gas emissions. Permafrost soils are extremely heterogenous within profile between landforms. This heterogeneity in environmental conditions, content composition, potentially leads to different communities with responses warming. The aim of...