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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Uav Remote Sensing Approaches To Mapping Glacier Ablation And Snow Algae Radiative Forcing In The North Cascades., Shannon Healy
Uav Remote Sensing Approaches To Mapping Glacier Ablation And Snow Algae Radiative Forcing In The North Cascades., Shannon Healy
WWU Graduate School Collection
The stability of our cryosphere relies on highly reflective snow surfaces that reflect solar radiation, thereby maintaining the energy balance of the earth. The advances in Uncrewed Aerial Vehicle (UAV) technology allow for researchers to assess snow surfaces in remote terrain at unprecedented scales. With this thesis, we demonstrate the range of UAV applications to assess glacier ablation and map snow algae in the North Cascades. The first chapter employs a low-cost, light-weight UAV to measure ablation of the Sholes Glacier using Structure-from-Motion technology and validates the measurements with outlet stream discharge data collected by the Nooksack Indian Tribe. We …
The Photochemical Evolution Of Dissolved Black Carbon In Snow: A Case Study From The North Cascades, Molly Peek
The Photochemical Evolution Of Dissolved Black Carbon In Snow: A Case Study From The North Cascades, Molly Peek
WWU Graduate School Collection
Black carbon (BC) is partially combusted organic material from natural and anthropogenic sources, and is a highly effective driver of melt in the cryosphere. BC has been found in both populated and remote areas around the globe. This study follows the evolution of UV-exposed dissolved BC (DBC) in the cryosphere using the Benzenepolycarboxylic Acid (BPCA) markers B4CA, B5CA, and B6CA. Samples were collected from Mount Baker, Washington, and from both an in situ field study and a controlled photodegradation study, both using natural and anthropogenic BC standards. Both natural and experimental samples had a dominance of B5CA relative to other …
Testing The Potential For Using Structure From Motion Photogrammetry Methods To Estimate Seasonal Mass Balance On Lower Easton Glacier, Mount Baker, Wa, Elizabeth Kimberly
Testing The Potential For Using Structure From Motion Photogrammetry Methods To Estimate Seasonal Mass Balance On Lower Easton Glacier, Mount Baker, Wa, Elizabeth Kimberly
WWU Graduate School Collection
The traditional glaciological method of measuring glacier mass balance is labor-intensive and relies on broad extrapolation of sparse ablation stake data collected in the field to assess mass change across the glacier. In contrast, digital elevation models (DEMs) obtained from unmanned aerial vehicle (UAV) imagery and Structure-from-Motion (SfM) photogrammetry resolve a spatially distributed data set of surface elevation change. In this study, I compare seasonal mass balance estimated by field-based glaciological methods and UAV-SfM methods during summer 2018 on the Easton Glacier, Mount Baker, WA. Total snow and ice surface melt was measured at five ablation stakes between May 20th …
Quantifying The Magnitude And Spatial Variability Of Bedrock Erosion Beneath The Sisters Glacier, Washington, Using Cosmogenic 3he Concentrations, Sarah W. Francis
Quantifying The Magnitude And Spatial Variability Of Bedrock Erosion Beneath The Sisters Glacier, Washington, Using Cosmogenic 3he Concentrations, Sarah W. Francis
WWU Graduate School Collection
Cosmogenic 3He analyses provide a tool to infer spatial variation of cirque-glacial bedrock erosion. 3He accumulates in bedrock exposed at the surface as a result of cosmic ray bombardment; the concentration of cosmogenic 3He increases with exposure time as well as proximity to the surface. The Twin Sisters range, North Cascades, WA is an ideal location to use cosmogenic 3He to infer cirque-glacial erosion depths and rates, due to the dunite bedrock and the detailed record of Holocene glaciation from the nearby Mount Baker. We used field mapping, lidar data and aerial imagery to identify bedrock …