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Global Change Master Directory (GCMD)
Ice Sheet System Model (ISSM)
Entry ID: NASA_JPL_ISSM


Summary
Abstract: The Ice Sheet System Model (ISSM) is the result of a collaboration between the Jet Propulsion Laboratory and University of California at Irvine. Its purpose is to tackle the challenge of modeling the evolution of the polar ice caps in Greenland and Antarctica.

ISSM is funded by the NASA Cryosphere and MAP (Modeling Analysis and Prediction) programs, JPL R&TD (Research, Technology and Developmnt) and NSF. Our main collaborators are: MSSMat Laboratory of Ecole Centrale Paris and the Department of Geology of University of Buffalo, NY.

As synthesized in the last Intergovernmental Panel on Climate Change (IPCC) Assessment Report AR4, "future changes in the Greenland and Antarctic ice sheet mass, particularly due to changes in ice flow, are a major source of uncertainty that could increase sea level rise projections".

To remedy this problem, large scale ice flow models are necessary that can accurately model the evolution of Greenland and Antarctica in a warming climate. In order to achieve this goal, and improve projections of future sea level rise, ISSM relies on state of the art technologies, developed in sinergy with the Research and Technology Development (R&TD) at JPL. These include:

- Finite Element Modeling, which allows for the use of unstructured meshes to reach high resolutions in areas where ice flow dynamics is critical.

-Parallel technologies, using state of the art clusters such as the NASA Advanced Supercomputing Pleiades cluster. This allows ISSM to run bigger models, with a faster turn around.

-Anisotropic mesh refinement, which allows ISSM to zoom in on areas of interest, while saving computational resources by not refining meshes where ice flow is stagnant.

-Data assimilation using inverse methods in InSAR derived surface velocities, to infer basal drag coefficients and ice rheology.

-Multi-model methods, where different approximations for the dynamics of ice flow are solved in different areas, according to the type of flow encountered. This again saves a lot of computer time by only focusing on critical areas of an ice cap.

-Sensitivity analysis tools, based on the Dakota toolkit from Sandia National Laboratories. This suite of tools allows ISSM to constrain projections of future sea level rise, and to assess the reliability of such projections.

Related URL
Link: View Related Information
Description: Download the Ice Sheet System Model (ISSM) binaries and source code.


Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: Ice Sheet System Model (ISSM) documentation.

ISO Topic Category
GEOSCIENTIFIC INFORMATION
INLAND WATERS


Use Constraints
Copyright (c) 2002-2017, California Institute of Technology.
All rights reserved. Based on Government Sponsored Research under contracts NAS7-1407 and/or NAS7-03001.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

- Neither the name of the California Institute of Technology (Caltech), its operating division the Jet Propulsion Laboratory (JPL), the National Aeronautics and Space Administration (NASA), nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE CALIFORNIA INSTITUTE OF TECHNOLOGY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


Keywords
Models
Ice Sheet
Grounded Ice
Basal Drag
Transient Forcings



Distribution
Distribution_Media: Online
Fees: No fees


Personnel
ERIC LAROUR
Role: TECHNICAL CONTACT
Phone: 818-393-2435
Email: Eric.Larour at jpl.nasa.gov
Contact Address:
NASA JPL
City: Pasadena
Province or State: CA
Postal Code: 91109
Country: USA


ERIC RIGNOT
Role: TECHNICAL CONTACT
Phone: 818-354-1640
Email: eric.rignot at jpl.nasa.gov
Contact Address:
NASA JPL
City: Pasadena
Province or State: CA
Postal Code: 91109
Country: USA


TYLER B. STEVENS
Role: SERF AUTHOR
Phone: 301-851-8113
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
5700 Rivertech Court
City: Riverdale
Province or State: MD
Postal Code: 20737
Country: USA


Extended Metadata Properties
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Creation and Review Dates
SERF Creation Date: 2011-10-04
SERF Last Revision Date: 2017-08-10



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