GREENLAND ICE SHEET CHANGES FROM SPACE USING LASER, RADAR AND

Louise Sandberg Sørensen; Lars Stenseng; Sebastian Bjerregaard Simonsen; René Forsberg; S. K. Poulsen; V. Helm

GREENLAND ICE SHEET CHANGES FROM SPACE USING LASER, RADAR AND

Louise Sandberg Sørensen, Lars Stenseng, Sebastian Bjerregaard Simonsen, René Forsberg, S. K. Poulsen, V. Helm

Abstract

The Greenland cryosphere is undergoing rapid changes,
and these are documented by remote sensing from space.
In this paper, an inversion scheme is used to derive mass
changes from gravity changes observed by GRACE, and
to derive the mean annual mass loss for the Greenland Ice
Sheet, which is estimated to be 204 Gt/yr for the period
2002-2010.
NASA’s laser altimetry satellite ICESat has provided elevation
estimates of the ice sheet since January 2003. In
order to be able to compare GRACE and ICESat derived
results, the ICESat volume change must be converted into
a mass change estimate. Therefore, it is necessary to
model the densities and compaction of the firn. We find
that data from ASIRAS show great potential for validating
the glaciological models used to determine the densities
and firn compaction.

Original language	English
Title of host publication	Greenland Ice Sheet Changes from Space Using Laser, Radar and Gravity
Number of pages	5
Publication date	2010
Publication status	Published - 2010
Event	ESA Living Planet Symposium, - Bergen, Norway Duration: 28 Jun 2010 → 2 Jul 2010

Conference

Conference	ESA Living Planet Symposium,
Country/Territory	Norway
City	Bergen
Period	28/06/2010 → 02/07/2010

Cite this

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title = "GREENLAND ICE SHEET CHANGES FROM SPACE USING LASER, RADAR AND",

abstract = "The Greenland cryosphere is undergoing rapid changes, and these are documented by remote sensing from space. In this paper, an inversion scheme is used to derive mass changes from gravity changes observed by GRACE, and to derive the mean annual mass loss for the Greenland Ice Sheet, which is estimated to be 204 Gt/yr for the period 2002-2010. NASA{\textquoteright}s laser altimetry satellite ICESat has provided elevation estimates of the ice sheet since January 2003. In order to be able to compare GRACE and ICESat derived results, the ICESat volume change must be converted into a mass change estimate. Therefore, it is necessary to model the densities and compaction of the firn. We find that data from ASIRAS show great potential for validating the glaciological models used to determine the densities and firn compaction.",

author = "S{\o}rensen, {Louise Sandberg} and Lars Stenseng and Simonsen, {Sebastian Bjerregaard} and Ren{\'e} Forsberg and Poulsen, {S. K.} and V. Helm",

year = "2010",

language = "English",

booktitle = "Greenland Ice Sheet Changes from Space Using Laser, Radar and Gravity",

note = "ESA Living Planet Symposium, ; Conference date: 28-06-2010 Through 02-07-2010",

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TY - CHAP

T1 - GREENLAND ICE SHEET CHANGES FROM SPACE USING LASER, RADAR AND

AU - Sørensen, Louise Sandberg

AU - Stenseng, Lars

AU - Simonsen, Sebastian Bjerregaard

AU - Forsberg, René

AU - Poulsen, S. K.

AU - Helm, V.

PY - 2010

Y1 - 2010

N2 - The Greenland cryosphere is undergoing rapid changes, and these are documented by remote sensing from space. In this paper, an inversion scheme is used to derive mass changes from gravity changes observed by GRACE, and to derive the mean annual mass loss for the Greenland Ice Sheet, which is estimated to be 204 Gt/yr for the period 2002-2010. NASA’s laser altimetry satellite ICESat has provided elevation estimates of the ice sheet since January 2003. In order to be able to compare GRACE and ICESat derived results, the ICESat volume change must be converted into a mass change estimate. Therefore, it is necessary to model the densities and compaction of the firn. We find that data from ASIRAS show great potential for validating the glaciological models used to determine the densities and firn compaction.

AB - The Greenland cryosphere is undergoing rapid changes, and these are documented by remote sensing from space. In this paper, an inversion scheme is used to derive mass changes from gravity changes observed by GRACE, and to derive the mean annual mass loss for the Greenland Ice Sheet, which is estimated to be 204 Gt/yr for the period 2002-2010. NASA’s laser altimetry satellite ICESat has provided elevation estimates of the ice sheet since January 2003. In order to be able to compare GRACE and ICESat derived results, the ICESat volume change must be converted into a mass change estimate. Therefore, it is necessary to model the densities and compaction of the firn. We find that data from ASIRAS show great potential for validating the glaciological models used to determine the densities and firn compaction.

M3 - Book chapter

BT - Greenland Ice Sheet Changes from Space Using Laser, Radar and Gravity

T2 - ESA Living Planet Symposium,

Y2 - 28 June 2010 through 2 July 2010

ER -