S. O’Neel
YOU?
Author Swipe
View article: Improved workflow for customized ICESat-2 ATL06 elevations captures seasonal mountain snow depths at sub-kilometer scale
Improved workflow for customized ICESat-2 ATL06 elevations captures seasonal mountain snow depths at sub-kilometer scale Open
Mountain snowpacks are a critical global water resource, providing freshwater to more than a billion people worldwide. Estimates of snow distribution across mountain watersheds are dependent on sparse in situ observations and spatio-tempor…
View article: Calving Mechanisms Inferred From Observations of Surface Depressions at Helheim Glacier, Greenland
Calving Mechanisms Inferred From Observations of Surface Depressions at Helheim Glacier, Greenland Open
Dynamical changes at the termini of tidewater glaciers may trigger sustained acceleration, thinning, and retreat, increasing a glacier's contribution to sea level rise. However, processes at the ice‐ocean interface occur across a range of …
View article: Leveraging Weekly Snow Cover Time Series for Improved Glacier Monitoring and Modeling
Leveraging Weekly Snow Cover Time Series for Improved Glacier Monitoring and Modeling Open
Seasonal snow and ice melt strongly influence glacier mass balance, yet sparse sub‐annual observations limit our understanding of seasonal dynamics. Here we construct and analyze weekly snow cover time series for 200 glaciers across wester…
View article: Automated snow cover detection on mountain glaciers using spaceborne imagery and machine learning
Automated snow cover detection on mountain glaciers using spaceborne imagery and machine learning Open
Tracking the extent of seasonal snow on glaciers over time is critical for assessing glacier vulnerability and the response of glacierized watersheds to climate change. Existing snow cover products do not reliably distinguish seasonal snow…
View article: Seasonality of solute flux and water source chemistry in a coastal glacierized watershed undergoing rapid change : Wolverine Glacier watershed, Alaska
Seasonality of solute flux and water source chemistry in a coastal glacierized watershed undergoing rapid change : Wolverine Glacier watershed, Alaska Open
As glaciers rapidly lose mass, the tight coupling between glaciers and downstream ecosystems results in widespread impacts on global hydrologic and biogeochemical cycling. Knowledge of seasonally changing hydrologic processes and solute so…
View article: Modeling snow optical properties from single wavelength airborne lidar in steep forested terrain
Modeling snow optical properties from single wavelength airborne lidar in steep forested terrain Open
Airborne lidar is a powerful tool used by water resource managers to map snow depth and aid in producing spatially distributed snow water equivalent (SWE) when combined with modeled density. However, limited research so far has focused on …
View article: Spatially distributed snow depth, bulk density, and snow water equivalent from ground-based and airborne sensor integration at Grand Mesa, Colorado, USA
Spatially distributed snow depth, bulk density, and snow water equivalent from ground-based and airborne sensor integration at Grand Mesa, Colorado, USA Open
Estimating snow mass in the mountains remains a major challenge for remote-sensing methods. Airborne lidar can retrieve snow depth, and some promising results have recently been obtained from spaceborne platforms, yet density estimates are…
View article: Automated snow cover detection on mountain glaciers using space-borne imagery
Automated snow cover detection on mountain glaciers using space-borne imagery Open
Tracking the extent of seasonal snow on glaciers over time is critical for assessing glacier vulnerability and the response of glacierized watersheds to climate change. Existing snow cover products do not reliably distinguish seasonal snow…
View article: How to handle glacier area change in geodetic mass balance
How to handle glacier area change in geodetic mass balance Open
Innovations in geodesy enable widespread analysis of glacier surface elevation change and geodetic mass balance. However, coincident glacier area data are less widely available, causing inconsistent handling of glacier area change. Here we…
View article: Comment on tc-2023-141
Comment on tc-2023-141 Open
Abstract. Spaceborne remote sensing of snow currently enables landscape-scale snow covered area, but estimating snow mass in the mountains remains a major challenge from space. Airborne LiDAR can retrieve snow depth, and some promising res…
View article: Spatially distributed snow depth, bulk density, and snow water equivalent from ground-based and airborne sensor integration at Grand Mesa, Colorado, USA
Spatially distributed snow depth, bulk density, and snow water equivalent from ground-based and airborne sensor integration at Grand Mesa, Colorado, USA Open
Spaceborne remote sensing of snow currently enables landscape-scale snow covered area, but estimating snow mass in the mountains remains a major challenge from space. Airborne LiDAR can retrieve snow depth, and some promising results have …
View article: Historical Structure from Motion (HSfM): Automated processing of historical aerial photographs for long-term topographic change analysis
Historical Structure from Motion (HSfM): Automated processing of historical aerial photographs for long-term topographic change analysis Open
Precisely measuring the Earth's changing surface on decadal to centennial time scales is critical for many science and engineering applications, yet long-term records of quantitative landscape change are often temporally and geographically…
View article: Uncertainty of ICESat-2 ATL06- and ATL08-derived snow depths for glacierized and vegetated mountain regions
Uncertainty of ICESat-2 ATL06- and ATL08-derived snow depths for glacierized and vegetated mountain regions Open
Seasonal snow melt dominates the hydrologic budget across a large portion of the globe. Snow accumulation and melt vary over a broad range of spatial scales, preventing accurate extrapolation of sparse in situ observations to watershed sca…
View article: Beyond glacier-wide mass balances: parsing seasonal elevation change into spatially resolved patterns of accumulation and ablation at Wolverine Glacier, Alaska
Beyond glacier-wide mass balances: parsing seasonal elevation change into spatially resolved patterns of accumulation and ablation at Wolverine Glacier, Alaska Open
We present spatially distributed seasonal and annual surface mass balances of Wolverine Glacier, Alaska, from 2016 to 2020. Our approach accounts for the effects of ice emergence and firn compaction on surface elevation changes to resolve …
View article: The Imminent Calving Retreat of Taku Glacier
The Imminent Calving Retreat of Taku Glacier Open
Long an anomaly among glaciers, advancing while most others shrank, Taku Glacier is starting to succumb to climate change, offering an unprecedented look at the onset of tidewater glacier retreat.
View article: The Arctic
The Arctic Open
peer reviewed
View article: JOG volume 66 issue 257 Cover and Front matter
JOG volume 66 issue 257 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Explaining mass balance and retreat dichotomies at Taku and Lemon Creek Glaciers, Alaska
Explaining mass balance and retreat dichotomies at Taku and Lemon Creek Glaciers, Alaska Open
We reanalyzed mass balance records at Taku and Lemon Creek Glaciers to better understand the relative roles of hypsometry, local climate and dynamics as mass balance drivers. Over the 1946–2018 period, the cumulative mass balances diverged…
View article: JOG volume 66 issue 256 Cover and Front matter
JOG volume 66 issue 256 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Recent temperature history of the Juneau Icefield
Recent temperature history of the Juneau Icefield Open
<p>Recent temperature history of the Juneau Icefield</p><p>&#160;</p><p>Mass loss from Alaskan glaciers makes a significant contribution to current sea-level rise. The Juneau Icefield (JIF) of southeast Al…
View article: JOG volume 66 issue 255 Cover and Front matter
JOG volume 66 issue 255 Cover and Front matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Reanalysis of the US Geological Survey Benchmark Glaciers: long-term insight into climate forcing of glacier mass balance
Reanalysis of the US Geological Survey Benchmark Glaciers: long-term insight into climate forcing of glacier mass balance Open
Mountain glaciers integrate climate processes to provide an unmatched signal of regional climate forcing. However, extracting the climate signal via intercomparison of regional glacier mass-balance records can be problematic when methods f…
View article: Global sea-level contribution from Arctic land ice: 1971–2017
Global sea-level contribution from Arctic land ice: 1971–2017 Open
The Arctic Monitoring and Assessment Program (AMAP 2017) report identifies the Arctic as the largest regional source of land ice to global sea-level rise in the 2003–2014 period. Yet, this contextualization ignores the longer perspective f…
View article: Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys
Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys Open
There is significant uncertainty regarding the spatiotemporal distribution of seasonal snow on glaciers, despite being a fundamental component of glacier mass balance. To address this knowledge gap, we collected repeat, spatially extensive…
View article: Supplementary material to "Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys"
Supplementary material to "Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys" Open
Table S1.Observed density and calculated radar velocity at Gulkana and Wolverine glaciers.Density uncertainty is the standard deviation of all density observations collected that year, density velocity error is uncertainty introduced by un…
View article: Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys
Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys Open
There is significant uncertainty regarding the spatiotemporal distribution of seasonal snow on glaciers, despite being a fundamental component of glacier mass balance. To address this knowledge gap, we collected repeat, spatially extensive…
View article: Velocity variations at Columbia Glacier captured by particle filtering of oblique time-lapse images
Velocity variations at Columbia Glacier captured by particle filtering of oblique time-lapse images Open
We develop a probabilistic method for tracking glacier surface motion based on time-lapse imagery, which works by sequentially resampling a stochastic state-space model according to a likelihood determined through correlation between refer…
View article: Glacierized headwater streams as aquifer recharge corridors, subarctic Alaska
Glacierized headwater streams as aquifer recharge corridors, subarctic Alaska Open
Arctic river discharge has increased in recent decades although sources and mechanisms remain debated. Abundant literature documents permafrost thaw and mountain glacier shrinkage over the past decades. Here we link glacier runoff to aquif…