Version 2 (modified by smasson, 10 years ago) (diff)

Executive Summary

This document describes the development and current status of the web NEMO configurations data base definition, development and implementation. The goal of this work is to document the diversity of the simulations that can be achieved with the ocean model NEMO and illustrate the impacts of different configurations of the same code.

To do this, we established and delivered a standard experiment protocol and a complete set of diagnostics to be applied to NEMO outputs in order to qualify and quantify the biases of simulations and the differences between existing experiments. All information and source code are available on http://forge.ipsl.jussieu.fr/nemo/wiki/core2_cmip and all simulations can be found on the following DODS server: http://dodsp.idris.fr/reee605/

1. INTRODUCTION

The main goal of this task is to make model developers and users aware of the important difference existing between a model version and a model configuration. This is a key point to ensure transparency and comprehension of the work done around climate models. The same model version can indeed be used in numerous configurations (physical options, choice of parameterizations, horizontal and vertical grid description and resolution, definition of the initial state…) that can lead to very different results. The model inter-comparisons on which is based a large part of IPCC report from Working group 1, are exploring differences between models. We are here illustrating differences between different configurations of the same model.

In this part of WP4, we are therefore targeting:

1) to document the diversity of the simulations that can be achieved with the ocean model NEMO in order to demonstrate the importance of a complete description of the model configuration.
2) to constitute a data base illustrating the impacts of different configurations of the same code. This catalogue of simulations based on the same model but with different configurations will later on be used to understand the processes at stake in ocean modelling.
3) to establish and deliver a standard experiment protocol that could be used by researchers to validate their own implementation of NEMO. Next, this protocol will be used to explore and quantify the specificities of a configuration of a particular user.

Attachments (15)