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--- cmip6_discussion [2016/10/25 11:13]
mmenegoz [VolMIP]
+++ cmip6_discussion [2016/10/25 12:48] (current)
fmassonn
@@ Line 37: / Line 37: @@
 The aim and the design of the experiments planned for VolMIP can be found in [[http://volmip.org/|http://volmip.org/]] and are detailed in this file {{:volmip_cmip6-endorsedmip_application_final.doc|.doc}} It consists in three sets of experiments (Tier 1-2-3). The Climate Prediction Group will not be able to perform all the experiments planned and a selection has been done. From the Tier 1, Martin Ménégoz will perform the experiments "volc-pinatubo-full" and "volc-pinatubo-ini", which consist in 25-member simulations, one with preindustrial conditions, and the other as a forecast simulating a Pinatubo eruption in 2015. Depending on the future projects in the group, it could be interesting to perform more experiments, in particular to try to complete the Tier1 of VolMIP, that consists in a high number of simulations, especially when considering that some experiments from Tier2 have been moved to Tier1 in June 2015.
-NB: to initialize volc-pinatubo-full, we will need to run a pre-industrial control run (picontrol, DECK). We will probably run it at BSC
+NB1: to initialize volc-pinatubo-full, we will need to run a pre-industrial control run (picontrol, DECK). We will probably run it at BSC
-NB: volc-pinatubo-ini is common with DCPP
+NB2: volc-pinatubo-ini is common with DCPP
 Local contact: M. Ménégoz
@@ Line 49: / Line 50: @@
 Some initial ideas on how to generate an SST and sea-ice forcing set for the AMIP-style runs (including the future part to 2050 and beyond) has been posted to the [[https://dev.knmi.nl/documents/21|wiki]].
-The climate prediction group will run a 1950-2050 simulation.
+The climate prediction group will run a 1950-2050 coupled simulation.
 Local contact: V. Guemas
@@ Line 77: / Line 78: @@
 Documented by J. García-Serrano
+==== SIMIP =====
+The Sea Ice MIP (SIMIP,  {{http://www.geosci-model-dev.net/9/3427/2016/gmd-9-3427-2016.pdf|Paper}}) has the peculiarity to be a "diagnostic" MIP meaning that no actual dedicated experiments will be run under this project. In that sense, SIMIP will be "passive" and analyze information from simulations that will be produced in other MIPs, including DECK simulations.
+SIMIP has the ultimate goal to improve understanding about sea ice as a component of the complex coupled climate system: how does it respond to external forcing? how does it feed back? what is the role of internal versus forced variability of sea ice parameters?
+The SIMIP is organized around three guiding set of questions:
+(1) How can we explain model spread in simulating sea ice characteristics? Are they due to differences in the inherent formulation of physics and resolution? What is the role of sea ice physics with respect to differences in atmospheric and oceanic forcings? How does model spread compare to other sources of uncertainty (scenario, irreducible)?
+(2) How can we explain model biases? What part of the mismatch is truly related to model deficiencies, and what part is due to other factors (observational uncertainty, internal variability, methodological failures in the comparison,...)? What new diagnostics can be developed to trace the ability of models to represent processes (e.g., the ice-albedo feedback) and not just numbers (e.g., sea ice extent) that may hide compensating errors?
+(3) To what extent can we predict sea ice? What is the potential predictability of sea ice? What is the quality of initial conditions currently available? How to generate ensembles that reflect our uncertainty at best?
+BSC-ES is contributing to SIMIP through F. Massonnet being a member of the SIMIP-panel (lead by D. Notz and A. Jahn) but also by the provision of initial sea ice states generated by the ensemble Kalman filter with EC-Earth.
+Documented by F. Massonnet.

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