Ice velocity map and grounding line of Antarctica based on SAR interferometry now available for download from NSIDC

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Ice velocity map and grounding line of Antarctica based on SAR interferometry now available for download from NSIDC

Bernd Scheuchl
Two new Earth Science Data Records, which were generated at the Department
of Earth System Science at the University of California, Irvine in
collaboration with Caltech's Jet Propulsion Laboratory, are now available
for download at NSIDC:

(1) Ice Velocity Map of Antarctica from Satellite Radar Interferometry
    (Version 1.0) - http://nsidc.org/data/nsidc-0484.html

(2) Antarctic Grounding Line from Differential Satellite Radar Interferometry
    (Version 1.0) - http://nsidc.org/data/nsidc-0498.html

These data sets, part of the NASA Making Earth Science Data Records for
Use in Research Environments (MEaSUREs) program, provide the first
comprehensive, high-resolution, digital mosaic of ice motion in Antarctica
as well as 17 years of extensive high-resolution mapping of grounding
lines in Antarctica. Both data sets were assembled from multiple satellite
interferometric synthetic-aperture radar data. They are now available to
the scientific community as well as the interested public via the National
Snow and Ice Data Center (NSIDC).

Spaceborne SAR acquisitions were provided through data grants from the
following agencies:
 ALOS PALSAR: Japan Aerospace Exploration Agency (JAXA)
 ENVISAT ASAR, ERS-1, ERS-2: European Space Agency (ESA)
 RADARSAT, RADARSAT-2: Canadian Space Agency (CSA)
Data acquisitions between 2006 and 2009 are courtesy of the IPY Space Task
Group

If you have any questions, please contact NSIDC User Services at
[hidden email]


(1) Ice Velocity Map of Antarctica from Satellite Radar Interferometry
(Version 1.0)
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This data set provides the first comprehensive, high-resolution, digital
mosaic of ice motion in Antarctica assembled from multiple satellite
interferometric synthetic-aperture radar data. Data were acquired during
the International Polar Year 2007 to 2009. This map was built from spring
2009 data from the Canadian Space Agency (CSA)'s and MacDonald, Dettwiler
and Associates Ltd. (MDA)'s RADARSAT-2, spring 2007-2008-2009 data from
European Space Agency (ESA)'s Envisat ASAR, and fall 2007-2008 data from
the Japan Aerospace Exploration Agency (JAXA)'s Advanced Land Observing
Satellite (ALOS) PALSAR provided by the Alaska Satellite Facility,
complemented by patches of CSA's RADARSAT-1 data from fall 2000 and ESA's
Earth Remote Sensing Satellites ERS-1/2 data from spring 1996. Each radar
instrument contributes its unique coverage and performance level. The
final mosaic assembles 900 satellite tracks and more than 3,000 orbits of
radar data.

Rignot, E., J. Mouginot, and B. Scheuchl (2011), Ice Flow of the Antarctic
Ice Sheet, Science, doi 10.1126/science.1208336.

For more information go to: http://nsidc.org/data/nsidc-0484.html


(2) Antarctic Grounding Line from Differential Satellite Radar
Interferometry (Version 1.0)
-------------------------------------------------------------------------------------------
The data set provides detailed mappings of the location of the Antarctic
Ice Sheet grounding line, derived from satellite data collected between
1992 and 2009. Parameters include latitude, longitude, sensor, and up to 4
orbits and acquisitions dates. Two interferograms are required to perform
differential interferometry. This requires a minimum of 3 consecutive
acquisitions of a single sensor. In some cases two sets of two consecutive
acquisitions were used to generate the grounding line. In the case of the
ERS-1/ERS-2 Tandem mission, two Tandem interferograms (4 acquisitions) are
used for grounding line detection.

Rignot, E., J. Mouginot, and B. Scheuchl. 2011. Antarctic Grounding Line
Mapping from Differential Satellite Radar Interferometry, Geophyical
Research Letters, 38, L10504,doi:10.1029/2011GL047109.

For more information go to: http://nsidc.org/data/nsidc-0498.html


On behalf of
---------------------------------------------------------------------
 Eric Rignot
 Senior Research Scientist       Professor Earth System Science
 Jet Propulsion Laboratory       University of California, Irvine
 Mail Stop 300-319               Department of Earth System Science
 4800 Oak Grove Drive            Croul Hall
 Pasadena, CA 91109-8099 USA     Irvine, CA 92697-3100
 818 354-1640 (office)           949 824-3739 (office)
 818 393-5285 (fax)              949 824-3876 (department)
 818 653-2531 (cell)             949 824-3874 (fax)
 [hidden email]        [hidden email]
 ---------------------------------------------------------------------
http://www.ess.uci.edu/researchgrp/erignot

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sgb
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New data set available : GlobICE Sea Ice Dynamics Data now available for download

sgb

The GlobIce project is pleased to announce the first release of its
validated data products for Arctic sea ice during the winter seasons
of 2004-2010.

The data set includes netCDF products for Eulerian and Lagrangian sea ice
drift vectors, velocity, deformation, open water fraction, and mass flux
at 5km-100km resolution.

GlobICE is an ESA funded project to define, implement and validate an
information system for sea ice dynamics, derived from the SAR data archive
of ESA's Envisat and ERS satellites.

For further information on the project and access to the GlobICE data sets
please visit http://globice.mssl.ucl.ac.uk.

Additional data sets will be notified in the near future.

Email enquiries to [hidden email]  and [hidden email]

Best regards,
Steve

-------------------------------------------------------------------
Steven Baker                          email:    [hidden email]
GlobIce Project,
Mullard Space Science Laboratory,            
(University College London)
Holmbury House,                  
Holmbury St.Mary,                Tel:     +44  1483  204104
Dorking,                                  Fax:     +44  1483  278312
Surrey,  RH5 6NT. UK
-------------------------------------------------------------------


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