The role of watershed characteristics, permafrost thaw, and wildfire
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چکیده
Introduction Conclusions References
منابع مشابه
Spatial and temporal variation in thaw depth in Siberian tundra near Tiksi
Siberian tundra is characterised by permafrost overlaid with an active layer. The spatial and temporal variation in the thaw depth in the active layer may play an important role in biological and hydrological processes. In this study, we carried out field investigations of flat tundra and a hillslope in a watershed near Tiksi, Siberia, at various scales, from 1997 to 2000. The ground started to...
متن کاملIncreasing Winter Baseflow in Response to Permafrost Thaw and Precipitation Regime Shifts in Northeastern China
Rapid permafrost thaw and precipitation regime shifts are altering surface and subsurface hydrological processes in arctic and subarctic watersheds. Long-term data (40 years) from two large permafrost watersheds in northeastern China, the Tahe River and Duobukuer River watersheds, indicate that winter baseflows are characterized by significant positive trends of 1.7% and 2.5%·year−1, respective...
متن کاملQuantification of upland thermokarst features with high resolution remote sensing
Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active layer, localized thermokarst features form when ice-rich permafrost thaws and the ground subsides. Thermokarst ...
متن کاملRadiocarbon age-offsets in an arctic lake reveal the long-term response of permafrost carbon to climate change
Continued warming of the Arctic may cause permafrost to thaw and speed the decomposition of large stores of soil organic carbon (OC), thereby accentuating global warming. However, it is unclear if recent warming has raised the current rates of permafrost OC release to anomalous levels or to what extent soil carbon release is sensitive to climate forcing. Here we use a time series of radiocarbon...
متن کاملModeling thermal dynamics of active layer soils and near-surface permafrost using a fully coupled water and heat transport model
[1] Thawing and freezing processes are key components in permafrost dynamics, and these processes play an important role in regulating the hydrological and carbon cycles in the northern high latitudes. In the present study, we apply a well-developed soil thermal model that fully couples heat and water transport, to simulate the thawing and freezing processes at daily time steps across multiple ...
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تاریخ انتشار 2015