View source for ISMIP6 wiki page

[[File:Logo1.png|right|180x120px|link=http://www.climate-cryosphere.org/activities/targeted/ismip6/downloads|]] 
Welcome to the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6) wiki! You are encouraged to use the wiki pages to alter the formulation of numerical experiments, point out any inconsistencies or inaccuracies you find in the data sets, and post results and figures that you'd like others see and discuss. ISMIP6 also has a more official [http://www.climate-cryosphere.org/activities/targeted/ismip6 homepage], kindly hosted by CliC.

==What is ISMIP6?==

The overall framework for ISMIP6 is designed to deliver projections of the ice sheet contribution to sea level rise. ISMIP6 brings together for the first time a consortium of international ice sheet models and coupled ice sheet – climate models. This effort will thoroughly explore the sea level contribution from the Greenland and Antarctic Ice Sheet in our changing climate and assess the impact of large ice sheets on the climate system. Together with the new glacier [http://www.climate-cryosphere.org/activities/targeted/ismip6 CliC] (Climate and Cryosphere) targeted activity and projections of thermal expansion (that already sit within the [https://en.wikipedia.org/wiki/Coupled_model_intercomparison_project CMIP] Coupled Model Intercomparison Project framework), this will allow sea level to become part of the family of variables for which CMIP can provide routine IPCC-style projections. ISMIP6 is explicitly designed to ensure that ice sheet (hence sea level) projections are fully compatible with the CMIP6 (Coupled Model Intercomparison Project-Phase 6) process. ISMIP6 also provides the basis for investigating the feedbacks, impacts, and sea level changes associated with dynamic ice sheets and for quantifying the uncertainty in ice-sheet-sourced global sea level change. 


The proposed [http://www.geosci-model-dev.net/9/4521/2016/gmd-9-4521-2016.pdf experiments] will both use and augment the CMIP6-DECK (Diagnostic Evaluation and Characetization of Klima), Historical and ScenarioMIP experiments, as summarized in the table below. ISMIP6 will use the standard CMIP [https://en.wikipedia.org/wiki/General_circulation_model AGCM] (Atmosphere General Circulation Models) and [https://en.wikipedia.org/wiki/General_circulation_model AOGCM] (Atmosphere-Ocean General Circulation Models) experiments for analysis of the climate over and surrounding the ice sheets, and as forcing for the standalone ice sheet models (ISM) projections. Additional sensitivity experiments will be performed with the ISM to investigate the uncertainty associated with these projections arising from ice sheet models. The key output will be an ensemble of historical and future estimates of ice sheet contribution to sea level. To address the feedbacks introduced by interactive ice sheets, we propose that a small number of selected DECK experiments are repeated with coupled AOGCM-ISM, where the ice sheet is an interactive component of the AOGCM. Our assessment of the state of existing AOGCMs is that coupled models including an interactive Greenland ice sheet can realistically be expected for CMIP6, however including the Antarctic ice sheet remains challenging (because of the greater complexity of its response to climate forcing, and the issues associated with simulations of the Southern Ocean). It is for these reasons that [http://www.geosci-model-dev.net/9/4521/2016/gmd-9-4521-2016.pdf ISMIP6] heavily relies on standalone ice sheet models driven offline by CMIP6 climate models for projections of sea level.



{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Existing CMIP exp. used by ISMIP6 (AGCM-AOGCM only, no dynamic ice sheet required)'''
| align="center" style="background:#f0f0f0;"|'''New ISMIP6 CMIP6 exp. (Coupled AOGCM-ISM)'''
| align="center" style="background:#f0f0f0;"|'''Standalone ISMIP6 ice sheet model exp. (ISM only)'''
|-
| Pre-Industrial Control (''piControl'')
||Pre-Industrial Control (''piControl-withism'')
|ISM forced control by own AOGCM piControl output (''ism-piControl-self'') 
ISM forced by Present day Control (''ism-pdControl-std'')

|-
| 1% yr<sup>-1</sup>  CO<sub>2</sub> to quadrupling CO<sub>2</sub> (''1pctCO2to4x'')|| 1% yr<sup>-1</sup> CO<sub>2</sub> to quadrupling CO<sub>2</sub> (''1pctCO2to4x-withism'')||ISM forced by own AOGCM 1pctCO2to4x output (''ism-1pctCO2to4x-self'') 
ISM forced by ISMIP6-specified AOGCM 1pctCO2to4x output (''ism-1pctCO2to4x-std'') 
|-
|ScenarioMIP SSP5-8.5 up to year 2300 (''SSP5-8.5'') ||ScenarioMIP SSP5-8.5 up to year 2300  (''ssp585-withism'')||	ISM for 21st century and up to 2300 sea level forced by own AOGCM ssp585 output (''ism-ssp585-self'')
ISM forced by ISMIP6-specified AOGCM ssp585 output (''ism-ssp585-std'')
|-
| AMIP simulation (''amip'')|| ||ISM for last few decades forced by amip (''ism-amip-std'') 
|-
| CMIP6 Historical Simulation (''historical'') || CMIP6 Historical Simulation (''historical-withism'') || ISM for the historical period forced by own AOGCM historical output (''ism-historical-self'')
ISM forced by ISMIP6-specified AOGCM historical output (''ism-historical-std'')
|-
| Last Interglacial at 127 ky BP (<span class="plainlinks">[https://pmip4.lsce.ipsl.fr/doku.php/exp_design:lig127 ''lig127k'']</span>) || || ISM for the last interglacial period forced by lig127k (''ism-lig127k-std'')
|-
| || || Other ISMIP6 specific experiments to explore uncertainty due to ISM.
|}

==ISMIP6 activities==

'''[[ISMIP6 Standalone Ice Sheet Experiments]]''' > These pages describe the experimental setup for the standalone ice sheet model simulations. At present, ISMIP6 standalone ice sheet modeling focusses on gaining insight into the uncertainty in ice sheet evolution resulting from the choice of initialization methods (the initMIP efforts for the Greenland and Antarctic ice sheets).  

[[initMIP-Greenland]]

[[initMIP-Antarctica]]


'''[[ISMIP6 Coupled Ice Sheet Climate Experiments]]''' > This page describes the experimental setup for the coupled ice sheet-climate model simulations


'''[[ISMIP6 Meetings]]''' > Use this page to find out when and where our next meeting will be!

==ISMIP6 resources==

'''[[Datasets]]''' > This page describes Datasets that whole ice sheet models can use.

Use this [http://www.climate-cryosphere.org/activities/targeted/ismip6/downloads page] to download ISMIP6 logos.

==ISMIP6 Participants==

ISMIP6 is a community effort that involves scientists interested in the polar regions, ranging from experts in polar remote sensing to modeling. If you would like to be involved in ISMIP6, please email ismip6-at-gmail.com. A big thank you to our members contributing to the numerical simulations!

===Greenland Standalone Ice Sheet Modeling===

{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Contributors'''
| align="center" style="background:#f0f0f0;"|'''Model'''
| align="center" style="background:#f0f0f0;"|'''Group ID'''
| align="center" style="background:#f0f0f0;"|'''Group'''

|- align="center"
||Nick Golledge 
||PISM
||ARC
||Antarctic Research Centre, Victoria University of Wellington, NZ

|- align="center"
||Martin Rückamp, Angelika Humbert  
||ISSM
||AWI
||Alfred Wegener Institute for Polar and Marine Research, DE /University of Bremen, DE

|- align="center"
||Victoria Lee, Tony Payne
||BISICLES 
||BGC
||University of Bristol, Bristol, UK

|- align="center"
||Christian Rodehacke 
||PISM
||DMI
||Danish Meteorological Institute, DK


|- align="center"
||Ralf Greve
||SICOPOLIS
||ILTS
||Institute of Low Temperature Science, Hokkaido University, Sapporo, JP

|- align="center"
||Ralf Greve,  Reinhard Calov 
||SICOPOLIS
||ILTS_PIK
||Institute of Low Temperature Science, Hokkaido University, Sapporo, JP /
Potsdam Institute for Climate Impact Research, Potsdam, DE 

|- align="center"
||Heiko Goelzer, Roderik van de Wal
||IMAUICE
||IMAU
||Utrecht University, Institute for Marine and Atmospheric Research (IMAU), Utrecht, NL

|- align="center"
||Helene Seroussi, Nicole Schlegel
||ISSM
||JPL
||NASA Jet Propulsion Laboratory, Pasadena, USA 

|- align="center"
||William Lipscomb, Joseph H. Kennedy 
||CISM
||LANL
||Los Alamos National Laboratory, Los Alamos, USA / Oak Ridge National Laboratory, USA

|- align="center"
||Fabien Gillet-Chaulet, Olivier Gagliardini
||Elmer
||LGGE
||Laboratoire de Glaciologie et Géophysique de l'Environnement, FR

|- align="center"
||Sébastien Le clec'h
||GRISLI
||LSCE
||Laboratoire des sciences du climat et de l'environnement, FR

|- align="center"
||Fuyuki Saito,  Ayako Abe-Ouchi 
||IcIES
||MIROC
||Japan Agency for Marine-Earth Science and Technology, JP / The University of Tokyo, Tokyo, JP 

|- align="center"
||Florian Ziemen 
||PISM
||MPIM
||Max Planck Institute for Meteorology, DE

|- align="center"
||Andy Aschwanden
||PISM
||UAF
||Geophysical Institute, University of Alaska Fairbanks, USA

|- align="center"
||Helene Seroussi, Mathieu Morlighem
||ISSM
||UCIJPL
||NASA Jet Propulsion Laboratory, Pasadena, USA / University of California Irvine, Irvine, USA

|- align="center"
||Sainan Sun and Frank Pattyn 
||FETISH
||ULB
||Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, BE

|- align="center"
||Philippe Huybrechts,  Heiko Goelzer
||GISM
||VUB
||Vrije Universiteit Brussel, Brussels, BE

|}

===Antarctica Standalone Ice Sheet Modeling===

{| class="wikitable"
| align="center" style="background:#f0f0f0;"|'''Contributors'''
| align="center" style="background:#f0f0f0;"|'''Model'''
| align="center" style="background:#f0f0f0;"|'''Group ID'''
| align="center" style="background:#f0f0f0;"|'''Group'''
|- align="center"
||Nick Golledge 
||PISM1, PISM2
||ARC
||Antarctic Research Centre, Victoria University of Wellington, NZ

|- align="center"
||Thomas Kleiner, Johannes Sutter
||PISM
||AWI
||Alfred Wegener Institute for Polar and Marine Research, DE /University of Bremen, DE

|- align="center"
||Stephen Cornford
||BISICLESPRELIM
||CPOM
||University of Bristol, Centre for Polar Observation and Modelling, UK

|- align="center"
||Ralf Greve
||SICOPOLIS
||ILTS
||Institute of Low Temperature Science, Hokkaido University, Sapporo, JP

|- align="center"
||Heiko Goelzer
||IMAUICE64
||IMAU
||Utrecht University, Institute for Marine and Atmospheric Research (IMAU), Utrecht, NL

|- align="center"
||Nicole Schlegel, Helene Seroussi
||ISSM
||JPL
||NASA Jet Propulsion Laboratory, Pasadena, USA 

|- align="center"
||David Pollard
||EQNOMEC,GLNOMAC
||PSU
||Pennsylvania State University EMS Earth and Environmental Systems Institute, Pennsylvania, USA

|- align="center"
||Helene Seroussi, Mathieu Morlighem
||ISSM
||UCIJPL
||NASA Jet Propulsion Laboratory, Pasadena, USA / University of California Irvine, Irvine, USA

|- align="center"
||Sainan Sun, Frank Pattyn 
||FETISH
||ULB
||Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, BE
|}


===Model Characteristics===
Antarctica Models Summary
{| class="wikitable" style="margin: 1em auto 1em auto;"
|align="center" style="background:#f0f0f0;"|'''         '''
|align="center" style="background:#f0f0f0;"|'''ARC PISM1 PISM2           '''
| align="center" style="background:#f0f0f0;"|'''AWI PISM         '''
| align="center" style="background:#f0f0f0;"|'''CPOM BICYCLES PRELIM         '''
| align="center" style="background:#f0f0f0;"|'''ILTS SICOPOLIS         '''
| align="center" style="background:#f0f0f0;"|'''IMAU IMAUICE64         '''
| align="center" style="background:#f0f0f0;"|'''JPL1 ISSM      '''
| align="center" style="background:#f0f0f0;"|'''PSU EQNO MEC        '''
| align="center" style="background:#f0f0f0;"|'''PSU GLNO MEC         '''
| align="center" style="background:#f0f0f0;"|'''UCIJPL ISSM         '''
| align="center" style="background:#f0f0f0;"|'''ULB FETISH         '''
| align="center" style="background:#f0f0f0;"|'''VUB AIS PALEO         '''

|- align="center"
||Numerics
||FD
||FD
||FV
||FD
||FD
||FE
||FD
||FD
||FE
||FD
||FD

|- align="center"
||Ice Flow
||HYB
||HYB
||SSA
||SIA/ SSA
||SSA
||SSA
||HYB
||HYB
||HO
||HYB
||SIA/ SSA

|- align="center"
||Initialization
||SP
||SP
||DA
||SP
||SP
||DA
||DA+ SP
||SP
||DA
||DA+ SP
||SP

|- align="center"
||Initial Year
||2000
||2000
||2010
||1990
||2005
||2007
||2007
||2007
||2007
||2000
||2000

|- align="center"
||Initial SMB
||RA2
||RA2.3
||None
||Arth.
||RA2.3
||RA2
||PDD
||PDD
||RA2
||MAR
||PDD

|- align="center"
||Basal Sliding
||PL
||NP
||CL
||WS
||VS
||WS
||WS
||WS
||WS
||WS
||WS

|- align="center"
||Initial Grid (km)
||16
||16
||1-8
||8
||64
||1-50
||16
||16
||3-50
||32
||20

|}

Numerical method: FD= Finite difference, FE= Finite element, FV= Adaptive mesh refinement

Ice flow: SIA= Shallow ice approximation, SSA= Shallow shelf approximation, HO= Higher order, HYB= Hybrid SIA-SSA

Initialization: DA= Data Assimilation, SP= Spin up

Initial SMB: RA2= RACMO2.1, RA2.3= RACMO2.3, PDD= Positive Degree Day Model, MAR= MAR

Basal sliding: PL=Pseudo-plastic, NP=Nearly Plastic, VS= Viscous Sliding, WS= Weertman Sliding

==Climate Modeling Centers==

Climate modeling centers that have expressed an interest in ISMIP6.
{| class="wikitable" style="margin: 1em auto 1em auto;"
|align="center" style="background:#f0f0f0;"|'''Climate model            '''
| align="center" style="background:#f0f0f0;"|'''Ice-sheet model         '''
| align="center" style="background:#f0f0f0;"|'''Institute/country         '''

|- align="center"
||CanESM
||None
||CCCma/CA


|- align="center"
||CESM2
||CISM
||NCAR-LANL/USA

|- align="center"
||CNRM-CM
||GRISLI
||CNRM/FR


|- align="center"
||EC-Earth
||GrIS
||DMI/DK


|- align="center"
||GISS
||PISM
||NASA-GISS/USA


|- align="center"
||INMCM
||VUB
||INM/RU


|- align="center"
||IPSL-CM6
||GRISLI
||IPSL/FR


|- align="center"
||MIROC-ESM
||IcIES
||AORI-UT-JAMSTEC-NIES/JP

|- align="center"
||MPI-ESM
||PISM
||MPI/DE

|- align="center"
||UKESM
||BISICLES
||MetOffice/UK

|}