A5077352090- Climate change and permafrost
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Landslides and related hazards
- Indigenous Studies and Ecology
- Geological Modeling and Analysis
- Geological Studies and Exploration
- Planetary Science and Exploration
- Smart Materials for Construction
- Hydrocarbon exploration and reservoir analysis
- Soil Moisture and Remote Sensing
- Remote Sensing and LiDAR Applications
- 3D Surveying and Cultural Heritage
- Plant Ecology and Soil Science
- Water resources management and optimization
- Computational Physics and Python Applications
- Geochemistry and Geologic Mapping
- Hydropower, Displacement, Environmental Impact
- Meteorological Phenomena and Simulations
- Fire effects on ecosystems
- Image Processing and 3D Reconstruction
- Archaeological Research and Protection
- Satellite Image Processing and Photogrammetry
Los Alamos National Laboratory
2019-2024
Northern Arizona University
2022-2024
Abstract Tundra and boreal ecosystems encompass the northern circumpolar permafrost region are experiencing rapid environmental change with important implications for global carbon (C) budget. We analysed multi-decadal time series containing 302 annual estimates of dioxide (CO 2 ) flux across 70 non-permafrost ecosystems, 672 summer CO 181 ecosystems. find an increase in sink but not despite similar increases uptake. Thus, recent non-growing-season losses have substantially impacted balance...
Abstract. The spatial distribution of snow plays a vital role in sub-Arctic and Arctic climate, hydrology, ecology due to its fundamental influence on the water balance, thermal regimes, vegetation, carbon flux. However, is not well understood, therefore, it modeled, which can lead substantial uncertainties cover representations. To capture key hydro-ecological controls distribution, we carried out intensive field studies over multiple years for two small (2017–2019; ∼ 2.5 km2) study sites...
Permafrost thaw causes the seasonally thawed active layer to deepen, causing Arctic shift toward carbon release as soil organic matter becomes susceptible decomposition. Ground subsidence initiated by ice loss can cause these soils collapse abruptly, rapidly shifting moisture microtopography changes and also accelerating nutrient mobilization. The uncertainty of trajectories during makes it difficult predict role abrupt in suppressing or exacerbating losses. In this study, we investigated...
Abstract. Thawing permafrost can alter topography, ecosystems, and sediment carbon fluxes, but predicting landscape evolution of permafrost-influenced watersheds in response to warming and/or hydrological changes remains an unsolved challenge. Sediment flux slope instability sloping saturated soils have been commonly predicted from topographic metrics (e.g., slope, drainage area). In addition factors, cohesion imparted by soil vegetation melting ground ice may also control spatial trends...
ABSTRACT Understanding changes in snow distribution permafrost ecosystems is fundamental to predicting their response future climate change. The expansion of tall shrubs into tundra can trap and insulate during the winter, but overall insulation effect dependent upon many ecosystem properties. To study shrub–snow–ground interactions, small temperature sensors were deployed at two research sites on Seward Peninsula Alaska, USA, 2019–2020 winter. Snow temperatures used extrapolate multiple...
The use of uncrewed aerial systems (UAS) increases the opportunities for detecting surface changes in remote areas and challenging terrain. Detecting topographic offers an important constraint understanding earthquake damage, groundwater depletion, effects mining, other events. For these purposes, on order 5–10 cm are readily detected, but sometimes it is necessary to detect smaller changes. An example that result from underground explosions, which can be as small 3 cm. Previous studies...
Abstract. Thawing permafrost can alter topography, ecosystems, and sediment carbon fluxes, but predicting landscape evolution of permafrost-influenced watersheds in response to warming and/or hydrological changes remains an unsolved challenge. Sediment flux slope instability sloping saturated soils have been commonly predicted from topographic metrics (e.g., slope, drainage area). In addition factors, cohesion imparted by soil vegetation melting ground ice may also control spatial trends...
Abstract. The spatial distribution of snow plays a vital role in Arctic climate, hydrology, and ecology due to its fundamental influence on the water balance, thermal regimes, vegetation, carbon flux. However, for earth system modelling, is not well understood, therefore, it modeled, which can lead substantial uncertainties cover representations. To capture key hydro-ecological controls distribution, we carried out intensive field studies over multiple years two small (2017–2019, ~2.5 km2)...
ABSTRACT Research in geocryology is currently principally concerned with the effects of climate change on permafrost terrain. The motivations for most research are (1) quantification anticipated net emissions CO 2 and CH 4 from warming thaw near‐surface (2) mitigation infrastructure such thaw. Some effects, as increases ground temperature or active‐layer thickness, have been observed several decades. Landforms that sensitive to creep deformation moving more quickly a result, Rock Glacier...
Abstract. Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling predicting future changes. These aspects especially important change modeling where accurate representation sub-grid variability may be necessary predict watershed-scale behaviors. Our research goal is characterize intra-...
Abstract. Uncrewed aircraft systems (UAS) are increasingly used across disciplines in academic research. We deployed a heavy-lift UAS (<25 kg) for research the Arctic tundra, remote and complex landscape. Conducting work this location required adapting our standard field approach to include both unique challenges of working these locations with those specific work. collected metadata on each campaign analyzed expended efforts contributors successes failures. formulated set best practices...
Abstract. Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling predicting future changes. These aspects especially important change modelling where accurate representation sub-grid variability may be necessary predict watershed behaviours. Our research goal was characterize intra-...