Daniel B. Fagre, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 82
Distance and environmental difference in alpine plant communities Distance and environmental difference in alpine plant communities
Differences in plant communities are a response to the abiotic environment, species interactions, and dispersal. The role of geographic distance relative to the abiotic environment is explored for alpine tundra vegetation from 319 plots of four regions along the Rocky Mountain cordillera in the USA. The site by species data were ordinated using nonmetric multidimensional scaling to...
Authors
George P. Malanson, Dale L. Zimmerman, Daniel B. Fagre
Relations of alpine plant communities across environmental gradients: Multilevel versus multiscale analyses Relations of alpine plant communities across environmental gradients: Multilevel versus multiscale analyses
Alpine plant communities vary, and their environmental covariates could influence their response to climate change. A single multilevel model of how alpine plant community composition is determined by hierarchical relations is compared to a separate examination of those relations at different scales. Nonmetric multidimensional scaling of species cover for plots in four regions across the...
Authors
George P. Malanson, Dale L. Zimmerman, Mitch Kinney, Daniel B. Fagre
Glaciological measurements and mass balances from Sperry Glacier, Montana, USA, years 2005–2015 Glaciological measurements and mass balances from Sperry Glacier, Montana, USA, years 2005–2015
Glacier mass balance measurements help to provide an understanding of the behavior of glaciers and their response to local and regional climate. In 2005 the United States Geological Survey established a surface mass balance monitoring program on Sperry Glacier, Montana, USA. This project is the first quantitative study of mass changes of a glacier in the US northern Rocky Mountains and...
Authors
Adam Clark, Daniel B. Fagre, Erich H. Peitzsch, Blase A. Reardon, Joel T. Harper
Using structure from motion photogrammetry to examine glide snow avalanches Using structure from motion photogrammetry to examine glide snow avalanches
Structure from Motion (SfM), a photogrammetric technique, has been used extensively and successfully in many fields including geosciences over the past few years to create 3D models and high resolution digital elevation models (DEMs) from aerial or oblique photographs. SfM has recently been used in a limited capacity in snow avalanche research and shows promise as a tool for broader...
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
Terrain parameters of glide snow avalanches and a simple spatial glide snow avalanche model Terrain parameters of glide snow avalanches and a simple spatial glide snow avalanche model
Glide snow avalanches are dangerous and difficult to predict. Despite substantial recent research there is still inadequate understanding regarding the controls of glide snow avalanche release. Glide snow avalanches often occur in similar terrain or the same locations annually, and repeat observations and prior work suggest that specific topography may be critical. Thus, to gain a better
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
Glacier-derived August runoff in northwest Montana Glacier-derived August runoff in northwest Montana
The second largest concentration of glaciers in the U.S. Rocky Mountains is located in Glacier National Park (GNP), Montana. The total glacier-covered area in this region decreased by ∼35% over the past 50 years, which has raised substantial concern about the loss of the water derived from glaciers during the summer. We used an innovative weather station design to collect in situ...
Authors
Adam Clark, Joel T. Harper, Daniel B. Fagre
Science and Products
Filter Total Items: 82
Distance and environmental difference in alpine plant communities Distance and environmental difference in alpine plant communities
Differences in plant communities are a response to the abiotic environment, species interactions, and dispersal. The role of geographic distance relative to the abiotic environment is explored for alpine tundra vegetation from 319 plots of four regions along the Rocky Mountain cordillera in the USA. The site by species data were ordinated using nonmetric multidimensional scaling to...
Authors
George P. Malanson, Dale L. Zimmerman, Daniel B. Fagre
Relations of alpine plant communities across environmental gradients: Multilevel versus multiscale analyses Relations of alpine plant communities across environmental gradients: Multilevel versus multiscale analyses
Alpine plant communities vary, and their environmental covariates could influence their response to climate change. A single multilevel model of how alpine plant community composition is determined by hierarchical relations is compared to a separate examination of those relations at different scales. Nonmetric multidimensional scaling of species cover for plots in four regions across the...
Authors
George P. Malanson, Dale L. Zimmerman, Mitch Kinney, Daniel B. Fagre
Glaciological measurements and mass balances from Sperry Glacier, Montana, USA, years 2005–2015 Glaciological measurements and mass balances from Sperry Glacier, Montana, USA, years 2005–2015
Glacier mass balance measurements help to provide an understanding of the behavior of glaciers and their response to local and regional climate. In 2005 the United States Geological Survey established a surface mass balance monitoring program on Sperry Glacier, Montana, USA. This project is the first quantitative study of mass changes of a glacier in the US northern Rocky Mountains and...
Authors
Adam Clark, Daniel B. Fagre, Erich H. Peitzsch, Blase A. Reardon, Joel T. Harper
Using structure from motion photogrammetry to examine glide snow avalanches Using structure from motion photogrammetry to examine glide snow avalanches
Structure from Motion (SfM), a photogrammetric technique, has been used extensively and successfully in many fields including geosciences over the past few years to create 3D models and high resolution digital elevation models (DEMs) from aerial or oblique photographs. SfM has recently been used in a limited capacity in snow avalanche research and shows promise as a tool for broader...
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
Terrain parameters of glide snow avalanches and a simple spatial glide snow avalanche model Terrain parameters of glide snow avalanches and a simple spatial glide snow avalanche model
Glide snow avalanches are dangerous and difficult to predict. Despite substantial recent research there is still inadequate understanding regarding the controls of glide snow avalanche release. Glide snow avalanches often occur in similar terrain or the same locations annually, and repeat observations and prior work suggest that specific topography may be critical. Thus, to gain a better
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre
Glacier-derived August runoff in northwest Montana Glacier-derived August runoff in northwest Montana
The second largest concentration of glaciers in the U.S. Rocky Mountains is located in Glacier National Park (GNP), Montana. The total glacier-covered area in this region decreased by ∼35% over the past 50 years, which has raised substantial concern about the loss of the water derived from glaciers during the summer. We used an innovative weather station design to collect in situ...
Authors
Adam Clark, Joel T. Harper, Daniel B. Fagre