Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave Data

View Catalog Page

Entry ID

NSIDC-0218

Summary

The Greenland ice sheet melt extent data, acquired as part of the NASA Program for Arctic Regional Climate Assessment (PARCA), is a daily (or every other day, prior to August 1987) estimate of the spatial extent of wet snow on the Greenland ice sheet since 1979. It is derived from passive microwave satellite brightness temperature characteristics using the Cross-Polarized Gradient Ratio (XPGR) of Abdalati and Steffen (1997). It is physically based on the changes in microwave emission characteristics observable in data from the Scanning Multi-channel Microwave Radiometer (SMMR) and the Special Sensor Microwave/Imager (SSM/I) instruments when surface snow melts. It is not a direct measure of the snow wetness but rather is a binary indicator of the state of melt of each SMMR and SSM/I pixel on the ice sheet for each day of observation. It is, however, a useful proxy for the amount of melt that occurs on the Greenland ice sheet. The data are provided in a variety of formats including raw data in ASCII format, gridded daily data in binary format, and annual and complete time series climatologies in gridded binary and GeoTIFF format. All data are in a 60 x 109 pixel subset of the standard Northern Hemisphere polar stereographic grid with a 25 km resolution and are available via FTP.

Geographic Coverage

 

Spatial Coordinates:
N: 84°     S: 60°     E: -10°     W: -73°    

Data Set Citation

Dataset Creator: Waleed Abdalati
Dataset Title: Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave Data
Dataset Release Date: 2008-02-25
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0218.html

Temporal Coverage

Start Date: 1979-04-02
Stop Date: 2007-12-31

Data Resolution

Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution: 29 years

Latitude Resolution: 25 km
Longitude Resolution: 25 km

Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution: 1 year

Location Keywords

  • CONTINENT NORTH AMERICA GREENLAND

Science Keywords

  • Cryosphere Snow/Ice Snow Melt
  • Cryosphere Snow/Ice Snow Melt
  • Terrestrial Hydrosphere Snow/Ice Snow Melt
  • Terrestrial Hydrosphere Snow/Ice Snow Melt

Ancillary Keywords

  • Greenland
  • Ice Sheet
  • PARCA
  • Passive Microwave
  • Passive Microwave Data
  • Polar Stereographic
  • SMMR
  • Snow Melt
  • SSM/I

ISO Topic Category (View Definitions)

  • Geoscientific Information
  • Imagery/Base Maps/Earth Cover

Platform

  • DMSP 5D-2/F11 Defense Meteorological Satellite Program-F11
  • DMSP 5D-2/F13 Defense Meteorological Satellite Program-F13
  • DMSP 5D-2/F8 Defense Meteorological Satellite Program-F8
  • NIMBUS-7
  • SATELLITES

Instrument

  • SMMR Scanning Multichannel Microwave Radiometer
  • SSM/I Special Sensor Microwave/Imager

Project

  • PARCA Program in Arctic Regional Climate Assessment

Data Set Progress

in work

Data Center

NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 13 KB
Distribution Format: Binary

Distribution Media: FTP
Distribution Size: 0 - 16 KB
Distribution Format: ASCII Text (.txt)

Distribution Media: FTP
Distribution Size: 2 - 4 KB
Distribution Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)

Personnel

Waleed Abdalati
Role: INVESTIGATOR
Email: waleed.abdalati@colorado.edu
Contact Address:

  • University of Colorado-Boulder/ CIRES
  • Director of ESOC/Associate Professor of Geography

City: Boulder
Province or State: CO
Postal Code: 80309
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW PROJECT HOME PAGE
NSIDC offers some of our data in the form of images. We have created Google Earth™ files that enable you to overlay these and other data-based images on a virtual globe.

VIEW PROJECT HOME PAGE
PARCA Program Web page.

Reference

Abdalati, Waleed and Konrad Steffen. 2001. Greenland Ice Sheet Melt Extent: 1979-1999. Journal of Geophysical Research (Atmospheres) 106(D24): 33983-8. Abdalati, Waleed and Konrad Steffen. 1997. Snowmelt on the Greenland Ice Sheet as Derived from Passive Microwave Satellite Data. Journal of Climate 10: 165-75.

Abdalati, Waleed and Konrad Steffen. 1995. Passive Microwave-derived Snow Melt Regions on the Greenland Ice Sheet. Geophysical Research Letters 22: 787-790. Abdalati, Waleed and J. Stroeve. 1993. Climate Sensitivity Studies of the Greenland Ice Sheet Using Satellite AVHRR, SMMR, SSM/I, and In Situ Data. Meteorology and Atmospheric Physics 51: 239-258.

Jezek, K. C., C. Merry, D. Cavalieri, S. Grace, J. Bedner, D. Wilson, and D. Lampkin. 1991. Comparison Between SMMR and SSM/I Passive Microwave Data Collected Over the Antarctic Ice Sheet. Byrd Polar Research Center Technical Report 91-03, Ohio State University, Columbus OH, 62 pp.

Mätzler, C. H. and R. Hüppi. 1989. Review of Signature Studies for Microwave Remote Sensing of Snowpacks. Advances in Space Research 9: 253-265.

Ulaby, F. T., R. K. Moore, and A. K. Fung. 1982. Radar Remote Sensing and Surface Scattering and Emission Theory. Microwave Remote Sensing. Vol. 2, Artech House.

Ulaby, F. T., R. K. Moore, and A. K. Fung. 1986. From Theory to Applications. Microwave Remote Sensing. Vol. 3, Artech House.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2008-02-25
Last DIF Revision Date: 2013-10-03

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

Back to Top