Hydrologic Outlets of the Greenland Ice Sheet, Version 1

Metadata Updated: April 30, 2019

The Hydrologic Outlets of the Greenland Ice Sheet data set contains GIS point shapefiles that include 891 observed and potential hydrologic outlets of the Greenland Ice Sheet, as identified by Lewis and Smith (2009), using satellite imagery. There are 460 observed hydrologic outlets that include proglacial streams and rivers emerging from the ice sheet (length scale >1 km), proglacial lakes touching the ice edge or clearly connected to it via streams or rivers (length scale >3 km), and sediment-rich plumes exiting tidewater glaciers into fjords. Also, there are 431 potential hydrologic outlets that include point locations with release of meltwater from fjords without obvious sediment discharge, as well as locations where the ice sheet directly connects to the ocean that cannot be proven to release meltwater.

Meltwater features along the entire edge of the ice sheet were mapped via photo interpretation of GoogleEarth and Landsat ETM+ 15 m panchromatic data. The exact acquisition dates of the imagery are not available; however, owing to the light and relatively snow-free conditions seen in the GoogleEarth and Landsat images, it is presumed that they were taken during the summer season. Neither Landsat or GoogleEarth images were available for a section of ice sheet within the northern Tunu region; therefore, that region was excluded from the study. This excluded area represents approximately 0.9 percent of the ice sheet perimeter. Data are available via FTP, and can be read in any GIS software. The following journal article provides documentation for this data set: Lewis, Sarah and Laurence Smith. 2009. Hydrologic Drainage of the Greenland Ice Sheet. Hydrological Processes doi: 10.1002/hyp.7343. This journal article can be accessed from the Documentation link at the top of this Web page.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date August 1, 2018
Metadata Updated Date April 30, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date April 30, 2019
Publisher NSIDC
Unique Identifier C1386250445-NSIDCV0
Maintainer
Sarah Lewis
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Hydrologic Outlets of the Greenland Ice Sheet, Version 1. Version 1. Archived by National Aeronautics and Space Administration, U.S. Government, National Snow and Ice Data Center. https://doi.org/10.5067/NBBVU83OJYY1.
Harvest Object Id c6782c32-7800-4bd2-a7d1-63889bdd6b14
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 1991-01-01
Homepage URL https://doi.org/10.5067/NBBVU83OJYY1
Language en-US
Metadata Type geospatial
Data Last Modified 2000-12-31
Program Code 026:001
Source Datajson Identifier True
Source Hash 47f097f77a04a789e2697907650cfe8a17dfd5c3
Source Schema Version 1.1
Spatial -80.79734 59.58015 -8.96739 85.02649
Temporal 1991-01-01T00:00:00Z/2000-12-31T23:59:59Z
Category geospatial

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