The University of Southampton
University of Southampton Institutional Repository

Transient simulations of the last 22,000 years, with a fully dynamic atmosphere in the GENIE earth-system framework

Transient simulations of the last 22,000 years, with a fully dynamic atmosphere in the GENIE earth-system framework
Transient simulations of the last 22,000 years, with a fully dynamic atmosphere in the GENIE earth-system framework
This paper presents and discusses an ensemble of transient model simulations from the Last Glacial Maximum to present-day. The model includes a fully dynamic, primitive equation atmosphere (the Reading IGCM), computed vegetation (TRIFFID), and a slab-ocean and seaice. The atmospheric model is more akin to a low-resolution GCM than traditional EMICS, and yet is fast enough for long ensemble simulations to be carried out. The model is tuned in a purely objective manner, using a genetic algorithm, which perturbs 30 tunable parameters in the model to find the best fit to a prescribed pre-industrial climate.
The control deglaciation experiment has good agreement with data at the Last glacial Maximum and mid-Holocene. The deglaciation ensembles are over initial conditions, physical processes, and tunable model parameters. The ice-sheets are prescribed, and changes in oceanic heat transport are neglected, and yet the model exhibits rapid transitions in many of the ensemble members. These are attributable to the interaction of the dynamic atmosphere with the sea-ice, and are not observed when the ocean and sea-ice surface temperatures are prescribed. The timing of these transitions is sensitive to the initial conditions, pointing to the chaotic nature of the climate system.
The simulations have been carried out making use of GRID technologies, developed as part of the GENIE project.
1029-7006
7956-7956
Lunt, D.J.
5bfca8db-49a7-45dd-9855-43606a58788b
Harris, P.
65908d3a-d64f-436d-829a-fd500923515b
Price, A.R.
15a6667c-60da-42e9-b6dd-4c0e56c33c52
Valdes, P.J.
7b271d19-a4cb-4fc3-af4e-6745239c01d8
Lunt, D.J.
5bfca8db-49a7-45dd-9855-43606a58788b
Harris, P.
65908d3a-d64f-436d-829a-fd500923515b
Price, A.R.
15a6667c-60da-42e9-b6dd-4c0e56c33c52
Valdes, P.J.
7b271d19-a4cb-4fc3-af4e-6745239c01d8

Lunt, D.J., Harris, P., Price, A.R. and Valdes, P.J. (2005) Transient simulations of the last 22,000 years, with a fully dynamic atmosphere in the GENIE earth-system framework. Geophysical Research Abstracts, 7, 7956-7956.

Record type: Article

Abstract

This paper presents and discusses an ensemble of transient model simulations from the Last Glacial Maximum to present-day. The model includes a fully dynamic, primitive equation atmosphere (the Reading IGCM), computed vegetation (TRIFFID), and a slab-ocean and seaice. The atmospheric model is more akin to a low-resolution GCM than traditional EMICS, and yet is fast enough for long ensemble simulations to be carried out. The model is tuned in a purely objective manner, using a genetic algorithm, which perturbs 30 tunable parameters in the model to find the best fit to a prescribed pre-industrial climate.
The control deglaciation experiment has good agreement with data at the Last glacial Maximum and mid-Holocene. The deglaciation ensembles are over initial conditions, physical processes, and tunable model parameters. The ice-sheets are prescribed, and changes in oceanic heat transport are neglected, and yet the model exhibits rapid transitions in many of the ensemble members. These are attributable to the interaction of the dynamic atmosphere with the sea-ice, and are not observed when the ocean and sea-ice surface temperatures are prescribed. The timing of these transitions is sensitive to the initial conditions, pointing to the chaotic nature of the climate system.
The simulations have been carried out making use of GRID technologies, developed as part of the GENIE project.

This record has no associated files available for download.

More information

Published date: 2005

Identifiers

Local EPrints ID: 23643
URI: http://eprints.soton.ac.uk/id/eprint/23643
ISSN: 1029-7006
PURE UUID: 6af22a5a-5135-4bb3-a58b-daa8a696497e

Catalogue record

Date deposited: 28 Mar 2006
Last modified: 17 Aug 2022 17:22

Export record

Contributors

Author: D.J. Lunt
Author: P. Harris
Author: A.R. Price
Author: P.J. Valdes

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×