Adjoint CISM
An adjoint of the GlimmerCISM model
A National Science Foundation  Collaboration in Mathematics and Geoscience (NSFCMG) project:
Enabling ice sheet sensitivity and stability analysis
with a largescale higherorder ice sheet model's
adjoint to support sea level change assessment
The GlimmerCISM modelGlimmerCISM is the the community developed ice sheet model. The model web site is: http://glimmercism.berlios.de/
The GlimmerCISM adjointOur goal is to enable applications of powerful mathematical concepts and computational tools for rigorous sensitivity analysis and formal state estimation in the context of largescale ice sheet modeling. At the center of the proposal is the generation and application of adjoint model (ADM) and tangent linear model (TLM) components of the new Community Ice Sheet Model (CISM). The goal will be achieved through rigorous use of automatic differentiation (AD). Read the project summary here. Adjoint methods and automatic differentiation in ice sheet modeling were also taught at a recent Summer School on Ice Sheet Modeling in Portland, OR. 
GalleryImages of project related results can be viewed here. Code ReviewTo begin, we are looking at the GlimmerCISM HO velocity code and identifying portions that may need to be altered for openAD to preform the automatic the differentiation. Test SuiteA suite of tests, ranging from the simplest to the most complex applications of Glimmer/CISM is being developed. MeetingsOne or more project members will be attending the following meetings.
