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1998_Glacier margins derived from 1998 aerial imagery for the named glaciers of Glacier National Park, MT and environs

Dates

Publication Date
Time Period
1998-09-11
Time Period
1998-09-12
Time Period
1998-09-14
Time Period
1998-09-15

Citation

Fagre, D.B., McKeon, L.A., Dick, K.A., and Fountain, A.G., 2017, Glacier margin time series (1966, 1998, 2005, 2015) of the named glaciers of Glacier National Park, MT, USA: U.S. Geological Survey data release, https://doi.org/10.5066/F7P26WB1.

Summary

These polygon features represent digitization of the glacier margins for the 37 named glaciers of Glacier National Park (GNP) and the 2 glaciers along the border of GNP derived from aerial images acquired on September 11, 12, 14, 15, 1998. The polygons represent only the main body portion of the glacier as they appeared in the 1998 imagery. Disconnected patches are not included as this dataset represents only the main body features. Polygons were digitized from orthorectified aerial images with initial digitization completed in 2001 by Michelle Manly, University of North Dakota graduate student. This set of polygons represents a thorough review with revisions to the initial dataset based on local knowledge and improved satellite imagery [...]

Contacts

Point of Contact :
Daniel B Fagre
Originator :
Daniel B Fagre, Lisa A McKeon, Michelle M Manly
Metadata Contact :
Lisa A McKeon
Publisher :
U.S. Geological Survey
Distributor :
GS ScienceBase

Attached Files

Click on title to download individual files attached to this item.

Shapefile: GNPglaciers_1998.zip
GNPglaciers_1998.cpg 5 Bytes
GNPglaciers_1998.dbf 21.62 KB
GNPglaciers_1998.prj 425 Bytes
GNPglaciers_1998.sbn 492 Bytes
GNPglaciers_1998.sbx 132 Bytes
GNPglaciers_1998.shp 695.18 KB
GNPglaciers_1998.shx 412 Bytes

Purpose

To develop a time series and history of glacier recession in Glacier National Park. This dataset delineates the 1998 perimeters of the named glaciers of Glacier National Park. Establishing the rates of glacier retreat are key to understanding the Glacier National Park ecosystem and future state of resources. For instance, glacial meltwater provides critical habitat for endangered stream insects. More broadly, retreating glaciers are indicative of long term climate change and have hydrologic and ecologic importance to many park resources. Glaciers and their retreat are of great interest to park visitors and the American public and are part of Glacier National Park's appeal. This is important because Glacier National Park is a major driver of the regional economy. Appropriate use of these data include comparing Glacier National Park's glacier area from different periods such as previous/subsequent years included in the data release, and from different parts of the world. The change in glacier area can be used to test models of glacier-climate interactions, and to estimate glacier contributions to streamflow.

Additional Information

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