ASIS:Minutes 14 07 2009

Understanding contemporary change in the West Antarctic ice sheet Project meeting, 14th July 2009, Southampton
Notes

Present: Tony Payne, Andreas Vieli, Poul Christoffersen. Copied to: Anne Le Brocq, Steve Price, Rupert Gladstone, Vicky Lee, Marion Bougamont, Gwendolyn Leysinger-Vieli.

We discussed what items of work remained to be done and how these mapped on to papers. The list below is my recollection of the discussion; I think it would be good if we iterated these ideas until we all agree on a definitive list. The order is supposed to reflect the order in which things will be done.

Once we are all happy with this, we can start to rough out the content of each of the papers, as well as a timetable.

Durham


 * 1) Inversion for rheology for Pine Island ice shelf (AV summer 2009).
 * 2) Work on inversion of whole PIG shelf-stream system for both basal slip and ice rheology (both separately and jointly); look into using different flow laws for basal slip (e.g. Joughin work on plastic bed) (AV autumn 2009).
 * 3) Shear zone parameterization – forward model with advection, closure and stress-related fracture (AV autumn 2009).
 * 4) PIG datasets at 1 km (ALB summer 2009).
 * 5) Complete construction of data sets (ALB summer 2009).
 * 6) Model WAIS with GLAM (or GLIMMER-CISM) using data sets from e. (ALB autumn 2009).
 * 7) Expand basal water routing model to include notational channels with flow by Manning’s equations (ALB autumn 2009).

Bristol


 * 1) Automatic differentiation – AJP to send shelf code to Patrick Heimbach to investigate how easy it would be to get adjoint (AJP summer 2009).
 * 2) Tidy up boundary conditions for shelf code and check PPM implementation (AJP summer 2009).
 * 3) Tidy 3d O(1) code and worry about inclusion into GLIMMER-CISM or GLAM (AJP/SP Summer 2009).
 * 4) Investigate grounding line parameterizations in AMR flowline model (RG Summer 2009).  Provide 1-d. PPM code to AV (VL Summer 2009).
 * 5) Complete development of simplified plume model and application to Pine Island ice shelf (VL Summer 2009).
 * 6) Complete development of cavity component of plume model with application to Ross or Ronne-Filchner ice shelves (VL Autumn 2009).
 * 7) Extract relevant OCCAM data for Amundsen Sea (RG Summer 2009).
 * 8) Complete HadCM3 ocean coupler (RG Autumn 2009).
 * 9) MISMIP experiments with 1-d. AMR code and GL parameterizations (RG Autumn 2009).
 * 10) Incorporation of GL parameterizations into 2-d. shelf work (AJP/SC/RG Autumn 2009).

Cambridge


 * 1) Complete work with GLAM on idealized ice stream domain with Tulaczyk- Christoffersen- Bougamont basal processes model with 3d O(1) stresses and temperature/thickness evolution (MB/PC/SP summer 2009).
 * 2) Apply either GLAM or GLIMMER-CISM using same combination of physics to Siple Coast ice streams using data generated from e. (MB/PC autumn 2009).

Papers (with very rough authorship – lead in bold)


 * 1) Coupled modelling of Pine Island ice shelf with plume model; some prognostic work and results from shelf assimilation work (VL, AV & AJP).
 * 2) Description of 3d O(1) paper (AJP, SP & others).
 * 3) Write up of geometry and boundary condition data sets (ALB & others).
 * 4) Comparison of AMR and stretched-grid models for 1.d flowline (RG, VL, AV & AJP).
 * 5) Parameterizations of GL in 1-d. AMR flowline model (RG & AJP).
 * 6) OPTION 1. PIG inversion and shear zone parameterization (AV & others). Prognostic work on PIG with cavity model (and GL migration?) (AJP, VL & others). OPTION 2. PIG inversion and prognostic PIG work with cavity (AJP, VL, AV & others). Shear zone parameterization (AV & others).
 * 7) Description of plume-cavity model and application to hot and cold ice shelves (VL & AJP).
 * 8) Depending on 5., final paper on PIG with 2d GL migration etc. etc. (Nature/Science).
 * 9) T-C-B basal processes model with higher physics for an idealized domain (MB, PC & SP).
 * 10) T-C-B basal processes model with higher physics for the Siple Coast (MB, PC & SP).

Tony Payne

23rd July 2009