Climatic warming since the end of the Little Ice Age has resulted in substantial glacier ice loss around the world. Most glaciers have undergone thinning and many exhibit retreat at their margins. Glacier loss triggers a cascade of hydrological and ecological effects that impact plants, animals and can create human hazard and economic hardship. USGS scientists are using a variety of methods and technologies to track glacier change in glacierized regions in North America. By understanding the link between climate and glacier loss scientists aim to enhance preparedness as increasing temperatures influence mountain ecosystems worldwide.
USGS Glacier Research - Climate Change in Mountain Ecosystems (CCME)
Understanding Climate Drivers – The loss of glaciers has far-reaching physical and ecological consequences that impact society. Glaciers are sensitively linked to climate, yet predicting exact glacier response to regional and local climate conditions requires research. Understanding glacier response to climate helps natural resource managers and policy makers prepare for change.
Glacier Monitoring - USGS scientists use emerging technologies to advance understanding of physical properties and the influence of climate variability on glacier loss.
USGS Benchmark Glacier Studies - Long-term mass balance research among five benchmark glaciers (including Sperry Glacier, GNP) advances our understanding of glacier-climate interactions and glacier processes. New fact sheet provides overview of USGS Benchmark Glacier Program.
Status of Glaciers in Glacier National Park- Glacier studies specific to the glaciers of Glacier National Park, MT.
Repeat Photography Project - Photographic documentation of glacier change in Glacier National park, MT.
Related Links:
Back to CCME
Below are other science projects associated with this project.
Science in Glacier National Park
Time Series of Glacier Retreat
Repeat Photography Project
Status of Glaciers in Glacier National Park
Glacier Monitoring Studies
Below are data or web applications associated with this project.
A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age
Glaciers of Glacier National Park Repeat Photography Collection
Glacier margin time series (1966, 1998, 2005, 2015) of the named glaciers of Glacier National Park, MT, USA
Below are multimedia items associated with this project.
Below are publications associated with this project.
U.S. Geological Survey Benchmark Glacier Project
The U.S. Geological Survey Benchmark Glacier Project combines decades of direct glaciological data with remote sensing data to advance the quantitative understanding of glacier-climate interactions. The global loss of glaciers, and consequent implications for water resources, sea level rise, and ecosystem function underscores the importance of U.S. Geological Survey glaciology research to facilit
Specialized meltwater biodiversity persists despite widespread deglaciation
Parsing complex terrain controls on mountain glacier response to climate forcing
Glacier retreat in Glacier National Park, Montana
Reanalysis of the U.S. Geological Survey Benchmark Glaciers: Long-term insight into climate forcing of glacier mass balance
Glacier recession since the Little Ice Age: Implications for water storage in a Rocky Mountain landscape
Local topography increasingly influences the mass balance of a retreating cirque glacier
Glaciological measurements and mass balances from Sperry Glacier, Montana, USA, years 2005–2015
Glacier-derived August runoff in northwest Montana
Climate change links fate of glaciers and an endemic alpine invertebrate
A century of climate and ecosystem change in Western Montana: What do temperature trends portend?
The Glacier - Climate Connection
The Glacier-Climate Connection geonarrative tells the story of the U.S. Geological Survey Benchmark Glacier Project, one of the longest running studies of glaciers on Earth.
Below are FAQ associated with this project.
How do we know glaciers are shrinking?
Repeat photography and aerial / satellite photo analysis provide evidence of glacier loss in terms of shape and area. The USGS Benchmark Glacier project has collected mass balance data on a network of glaciers in Alaska, Washington, and Montana for decades, quantifying trends of mass loss at all sites. Extensive field data collection at these sites includes twice yearly visits to measure seasonal...
- Overview
Climatic warming since the end of the Little Ice Age has resulted in substantial glacier ice loss around the world. Most glaciers have undergone thinning and many exhibit retreat at their margins. Glacier loss triggers a cascade of hydrological and ecological effects that impact plants, animals and can create human hazard and economic hardship. USGS scientists are using a variety of methods and technologies to track glacier change in glacierized regions in North America. By understanding the link between climate and glacier loss scientists aim to enhance preparedness as increasing temperatures influence mountain ecosystems worldwide.
USGS Glacier Research - Climate Change in Mountain Ecosystems (CCME)
Understanding Climate Drivers – The loss of glaciers has far-reaching physical and ecological consequences that impact society. Glaciers are sensitively linked to climate, yet predicting exact glacier response to regional and local climate conditions requires research. Understanding glacier response to climate helps natural resource managers and policy makers prepare for change.
Glacier Monitoring - USGS scientists use emerging technologies to advance understanding of physical properties and the influence of climate variability on glacier loss.
USGS Benchmark Glacier Studies - Long-term mass balance research among five benchmark glaciers (including Sperry Glacier, GNP) advances our understanding of glacier-climate interactions and glacier processes. New fact sheet provides overview of USGS Benchmark Glacier Program.
Status of Glaciers in Glacier National Park- Glacier studies specific to the glaciers of Glacier National Park, MT.
Repeat Photography Project - Photographic documentation of glacier change in Glacier National park, MT.
Related Links:
Back to CCME
- Science
Below are other science projects associated with this project.
Science in Glacier National Park
Glacier National Park (GNP) is considered a stronghold for a large diversity of plant and animal species and harbors some of the last remaining populations of threatened and endangered species such as grizzly bear and bull trout, as well as non threatened keystone species such as bighorn sheep and black bear. The mountain ecosystems of GNP that support these species are dynamic and influenced by...Time Series of Glacier Retreat
The retreat of glaciers (see PDF at end of page) in Glacier National Park, Montana, has received widespread attention by the media, the public, and scientists because it is a clear and poignant indicator of change in the northern Rocky Mountains of the USA. In 2017, the USGS and Portland State University released a dataset which describes the areas of the 37 named glaciers in Glacier National Park...Repeat Photography Project
Repeat photography provides objective visual evidence of landscape change. USGS scientists created approximately sixty repeat photography pairs that document glacier change in Glacier National Park. These photograph pairs are available as a collection hosted by the USGS Photographic Library and are publicly available for download. Modern (1997 to 2019) photographs were taken from precisely the...Status of Glaciers in Glacier National Park
Glaciers on the Glacier National Park (GNP) landscape have ecological value as a source of cold meltwater in the otherwise dry late summer months, and aesthetic value as the park’s namesake features. USGS scientists have studied these glaciers since the late 1800s, building a body of research that documents widespread glacier change over the past century. Ongoing USGS research pairs long-term data...Glacier Monitoring Studies
The purpose of the CCME's glacier monitoring studies is to systematically monitor changes in Glacier National Park’s namesake glaciers and to determine the causes of changes, assess their ecological and hydrological effects, and predict future changes and effects. - Data
Below are data or web applications associated with this project.
A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age
This data release consists of digitized glacier margins that represent the maximum extent of glaciers in Glacier National Park (GNP) and two glaciers on U.S. Forest Service's Flathead National Forest land during the peak of the Little Ice Age. Glacier margins are based on moraine deposits that result from active glaciation, and do not depict perennial snow and ice. Moraines are continuous arcuateGlaciers of Glacier National Park Repeat Photography Collection
The “Glaciers of Glacier National Park Repeat Photography Collection” is a compilation of photographs documenting the retreat of glaciers in Glacier National Park, Montana, U.S.A. (GNP) through repeat photography. The collection is comprised of 58 image pairs, resulting from twenty-two years of U.S.Geological Survey (USGS) field excursions (1997-2019) for the purpose of photographically documentinGlacier margin time series (1966, 1998, 2005, 2015) of the named glaciers of Glacier National Park, MT, USA
This dataset was created to develop a time series and history of glacier recession in Glacier National Park (GNP), Montana, USA. The dataset delineates the 1966, 1998, 2005 and 2015 perimeters of the 37 named glaciers of Glacier National Park and two additional glaciers on U.S. Forest Services Flathead National Forest land (the Bob Marshall Wilderness Complex) which borders GNP to the south. Estab - Multimedia
Below are multimedia items associated with this project.
- Publications
Below are publications associated with this project.
U.S. Geological Survey Benchmark Glacier Project
The U.S. Geological Survey Benchmark Glacier Project combines decades of direct glaciological data with remote sensing data to advance the quantitative understanding of glacier-climate interactions. The global loss of glaciers, and consequent implications for water resources, sea level rise, and ecosystem function underscores the importance of U.S. Geological Survey glaciology research to facilit
AuthorsCaitlyn Florentine, Lisa L. MckeonSpecialized meltwater biodiversity persists despite widespread deglaciation
Glaciers are important drivers of environmental heterogeneity and biological diversity across mountain landscapes. Worldwide, glaciers are receding rapidly due to climate change, with important consequences for biodiversity in mountain ecosystems. However, the effects of glacier loss on biodiversity have never been quantified across a mountainous region, primarily due to a lack of adequate data atAuthorsClint C. Muhlfeld, Timothy Joseph Cline, J. Joseph Giersch, Erich Peitzsch, Caitlyn Florentine, Dean Jacobsen, Scott HotalingParsing complex terrain controls on mountain glacier response to climate forcing
Glaciers are a key indicator of changing climate in the high mountain landscape. Glacier variations across a mountain range are ultimately driven by regional climate forcing. However, changes also reflect local, topographically driven processes such as snow avalanching, snow wind-drifting, and radiation shading as well as the initial glacier conditions such as hypsometry and ice thickness. Here weAuthorsCaitlyn Elizabeth Florentine, Joel T. Harper, Daniel B. FagreGlacier retreat in Glacier National Park, Montana
Currently, the volume of land ice on Earth is decreasing, driving consequential changes to global sea level and local stream habitat. Glacier retreat in Glacier National Park, Montana, U.S.A., is one example of land ice loss and glacier change. The U.S. Geological Survey Benchmark Glacier Project conducts glaciological research and collects field measurements across select North American glaciers,AuthorsCaitlyn FlorentineReanalysis of the U.S. Geological Survey Benchmark Glaciers: Long-term insight into climate forcing of glacier mass balance
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 for extrapolating and calibrating direct glaciological measurements are mixed or inconsistent. To address this problem, we reanalyzed and compared long-term massAuthorsShad O'Neel, Christopher J. McNeil, Louis C. Sass, Caitlyn Florentine, Emily Baker, Erich Peitzsch, Daniel J McGrath, Andrew G. Fountain, Daniel B. FagreGlacier recession since the Little Ice Age: Implications for water storage in a Rocky Mountain landscape
Glacial ice is a significant influence on local climate, hydrology, vegetation, and wildlife. We mapped a complete set of glacier areas from the Little Ice Age (LIA) using very high-resolution satellite imagery (30-cm) within Glacier National Park, a region that encompasses over 400,000 hectares. We measured glacier change across the park using LIA glacier area as a baseline and used this to estimAuthorsChelsea Mikle, Daniel B. FagreLocal topography increasingly influences the mass balance of a retreating cirque glacier
Local topographically driven processes – such as wind drifting, avalanching, and shading – are known to alter the relationship between the mass balance of small cirque glaciers and regional climate. Yet partitioning such local effects from regional climate influence has proven difficult, creating uncertainty in the climate representativeness of some glaciers. We address this problem for Sperry GlaAuthorsCaitlyn Florentine, Joel T. Harper, Daniel B. Fagre, Johnnie Moore, Erich H. PeitzschGlaciological 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 continues tAuthorsAdam Clark, Daniel B. Fagre, Erich H. Peitzsch, Blase A. Reardon, Joel T. HarperGlacier-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 measurements on fAuthorsAdam Clark, Joel T. Harper, Daniel B. FagreClimate change links fate of glaciers and an endemic alpine invertebrate
Climate warming in the mid- to high-latitudes and high-elevation mountainous regions is occurring more rapidly than anywhere else on Earth, causing extensive loss of glaciers and snowpack. However, little is known about the effects of climate change on alpine stream biota, especially invertebrates. Here, we show a strong linkage between regional climate change and the fundamental niche of a rare aAuthorsClint C. Muhlfeld, J. Joseph Giersch, F. Richard Hauer, Gregory T. Pederson, Gordon Luikart, Douglas P. Peterson, Christopher C. Downs, Daniel B. FagreA century of climate and ecosystem change in Western Montana: What do temperature trends portend?
The physical science linking human-induced increases in greenhouse gasses to the warming of the global climate system is well established, but the implications of this warming for ecosystem processes and services at regional scales is still poorly understood. Thus, the objectives of this work were to: (1) describe rates of change in temperature averages and extremes for western Montana, a region cAuthorsG.T. Pederson, L.J. Graumlich, D.B. Fagre, T. Kipfer, C.C. Muhlfeld - Web Tools
The Glacier - Climate Connection
The Glacier-Climate Connection geonarrative tells the story of the U.S. Geological Survey Benchmark Glacier Project, one of the longest running studies of glaciers on Earth.
- FAQ
Below are FAQ associated with this project.
How do we know glaciers are shrinking?
Repeat photography and aerial / satellite photo analysis provide evidence of glacier loss in terms of shape and area. The USGS Benchmark Glacier project has collected mass balance data on a network of glaciers in Alaska, Washington, and Montana for decades, quantifying trends of mass loss at all sites. Extensive field data collection at these sites includes twice yearly visits to measure seasonal...