HR: 14:40h
AN: G33C-05    [Abstracts]
TI: An assessment of high latitude land ice mass flux estimates derived from GRACE
AU: Rowlands, D D
EM: drowland@puuoo.gsfc.nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: * Luthcke, S B
EM: Scott.B.Luthcke@nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: McCarthy, J J
EM: jmccarthy@sgt-inc.com
AF: SGT Inc., Greenbelt Rd., Greenbelt, MD 20771,
AU: Zwally, H J
EM: zwally@icesat2.gsfc.nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: Hall, D
EM: Dorothy.K.Hall@nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: Arendt, A
EM: arendt@icesat2.gsfc.nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: Lemoine, F G
EM: flemoine@puuoo.gsfc.nasa.gov
AF: NASA GSFC, Greenbelt Rd., Greenbelt, MD 20770,
AU: Williams, T A
EM: twilliams03@carolina.rr.com
AF: SGT Inc., Greenbelt Rd., Greenbelt, MD 20771,
AU: Klosko, S M
EM: sklosko@sgt-inc.com
AF: SGT Inc., Greenbelt Rd., Greenbelt, MD 20771,
AB: Understanding the evolution of the ice sheets and glacier systems is of paramount importance due to the vulnerability of the Earth's cryosphere to climate change and its contribution to sea level. In recent years we have obtained a wealth of information regarding the remote land ice regions mainly through spaceborne and airborne observations. One such very important data set is that obtained from the NASA/DLR Gravity Recovery and Climate Experiment (GRACE) mission. The data from GRACE provide new opportunities to observe the complex spatial and temporal evolution of the cryosphere's land ice. However, use of these data for the understanding of climate change and its impacts requires that we fully characterize and quantify the limitations and accuracies of the mass flux solutions derived from these GRACE observations. In this talk we will discuss the latest Greenland, Antarctica and Alaska ice mass flux solutions derived from GRACE. We will explore the spatial and temporal resolution of these solutions and their accuracies, and discuss their limitations. We will present results of simulations, technique comparison, error analysis and comparisons to other data sets such as surface elevation change observations from laser altimetry, ICESat laser altimetry, and surface melt data from MODIS. The purpose is to understand the fundamental accuracy, resolution, limitations and strengths of the GRACE mass flux observations in order to better utilize them for climate change research.
DE: 0762 Mass balance (1218, 1223)
DE: 1217 Time variable gravity (7223, 7230)
DE: 1218 Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532)
DE: 1621 Cryospheric change (0776)
SC: Geodesy [G]
MN: 2007 Fall Meeting