The University of Southampton
University of Southampton Institutional Repository

Impact of model resolution on Arctic sea ice and North Atlantic Ocean heat transport

Impact of model resolution on Arctic sea ice and North Atlantic Ocean heat transport
Impact of model resolution on Arctic sea ice and North Atlantic Ocean heat transport

Arctic sea-ice area and volume have substantially decreased since the beginning of the satellite era. Concurrently, the poleward heat transport from the North Atlantic Ocean into the Arctic has increased, partly contributing to the loss of sea ice. Increasing the horizontal resolution of general circulation models (GCMs) improves their ability to represent the complex interplay of processes at high latitudes. Here, we investigate the impact of model resolution on Arctic sea ice and Atlantic Ocean heat transport (OHT) by using five different state-of-the-art coupled GCMs (12 model configurations in total) that include dynamic representations of the ocean, atmosphere and sea ice. The models participate in the High Resolution Model Intercomparison Project (HighResMIP) of the sixth phase of the Coupled Model Intercomparison Project (CMIP6). Model results over the period 1950–2014 are compared to different observational datasets. In the models studied, a finer ocean resolution drives lower Arctic sea-ice area and volume and generally enhances Atlantic OHT. The representation of ocean surface characteristics, such as sea-surface temperature (SST) and velocity, is greatly improved by using a finer ocean resolution. This study highlights a clear anticorrelation at interannual time scales between Arctic sea ice (area and volume) and Atlantic OHT north of 60∘N in the models studied. However, the strength of this relationship is not systematically impacted by model resolution. The higher the latitude to compute OHT, the stronger the relationship between sea-ice area/volume and OHT. Sea ice in the Barents/Kara and Greenland–Iceland–Norwegian (GIN) Seas is more strongly connected to Atlantic OHT than other Arctic seas.

Arctic sea ice, Model resolution, Ocean heat transport
0930-7575
Docquier, David
2ebb36fa-479b-4a1b-bf8a-ee963021dac4
Grist, Jeremy P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Roberts, Malcolm J.
5577a257-2416-4760-b72a-711f3a2dee84
Roberts, Christopher D.
b7b453e7-fc86-4b6a-8878-9a2a67f28e34
Semmler, Tido
17643358-2592-4dfd-8169-857ecaa1aece
Ponsoni, Leandro
f1e97fdc-d31d-47e2-9b31-bd52a1ada5db
Massonnet, François
ac08afc6-d4cd-4757-92c2-1520ec82e165
Sidorenko, Dmitry
917c2c3b-a8ed-4eb3-9c91-af001ec856e1
Sein, Dmitry V.
53a54c5b-5d3a-430a-9a20-a45ca08bc541
Iovino, Doroteaciro
12e63e7b-13d9-450f-8283-80fc543a10f2
Bellucci, Alessio
9b49ca54-c977-448d-a4e7-34930d4b0017
Fichefet, Thierry
7b3028c8-1af9-4671-b041-51022a13bf73
Docquier, David
2ebb36fa-479b-4a1b-bf8a-ee963021dac4
Grist, Jeremy P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Roberts, Malcolm J.
5577a257-2416-4760-b72a-711f3a2dee84
Roberts, Christopher D.
b7b453e7-fc86-4b6a-8878-9a2a67f28e34
Semmler, Tido
17643358-2592-4dfd-8169-857ecaa1aece
Ponsoni, Leandro
f1e97fdc-d31d-47e2-9b31-bd52a1ada5db
Massonnet, François
ac08afc6-d4cd-4757-92c2-1520ec82e165
Sidorenko, Dmitry
917c2c3b-a8ed-4eb3-9c91-af001ec856e1
Sein, Dmitry V.
53a54c5b-5d3a-430a-9a20-a45ca08bc541
Iovino, Doroteaciro
12e63e7b-13d9-450f-8283-80fc543a10f2
Bellucci, Alessio
9b49ca54-c977-448d-a4e7-34930d4b0017
Fichefet, Thierry
7b3028c8-1af9-4671-b041-51022a13bf73

Docquier, David, Grist, Jeremy P., Roberts, Malcolm J., Roberts, Christopher D., Semmler, Tido, Ponsoni, Leandro, Massonnet, François, Sidorenko, Dmitry, Sein, Dmitry V., Iovino, Doroteaciro, Bellucci, Alessio and Fichefet, Thierry (2019) Impact of model resolution on Arctic sea ice and North Atlantic Ocean heat transport. Climate Dynamics. (doi:10.1007/s00382-019-04840-y).

Record type: Article

Abstract

Arctic sea-ice area and volume have substantially decreased since the beginning of the satellite era. Concurrently, the poleward heat transport from the North Atlantic Ocean into the Arctic has increased, partly contributing to the loss of sea ice. Increasing the horizontal resolution of general circulation models (GCMs) improves their ability to represent the complex interplay of processes at high latitudes. Here, we investigate the impact of model resolution on Arctic sea ice and Atlantic Ocean heat transport (OHT) by using five different state-of-the-art coupled GCMs (12 model configurations in total) that include dynamic representations of the ocean, atmosphere and sea ice. The models participate in the High Resolution Model Intercomparison Project (HighResMIP) of the sixth phase of the Coupled Model Intercomparison Project (CMIP6). Model results over the period 1950–2014 are compared to different observational datasets. In the models studied, a finer ocean resolution drives lower Arctic sea-ice area and volume and generally enhances Atlantic OHT. The representation of ocean surface characteristics, such as sea-surface temperature (SST) and velocity, is greatly improved by using a finer ocean resolution. This study highlights a clear anticorrelation at interannual time scales between Arctic sea ice (area and volume) and Atlantic OHT north of 60∘N in the models studied. However, the strength of this relationship is not systematically impacted by model resolution. The higher the latitude to compute OHT, the stronger the relationship between sea-ice area/volume and OHT. Sea ice in the Barents/Kara and Greenland–Iceland–Norwegian (GIN) Seas is more strongly connected to Atlantic OHT than other Arctic seas.

Text
Docquier2019_Article_ImpactOfModelResolutionOnArcti - Version of Record
Available under License Creative Commons Attribution.
Download (12MB)

More information

Accepted/In Press date: 30 May 2019
e-pub ahead of print date: 11 June 2019
Keywords: Arctic sea ice, Model resolution, Ocean heat transport

Identifiers

Local EPrints ID: 432234
URI: http://eprints.soton.ac.uk/id/eprint/432234
ISSN: 0930-7575
PURE UUID: ff18886e-41f6-4f66-a492-0978b29b9bd3

Catalogue record

Date deposited: 05 Jul 2019 16:30
Last modified: 07 Oct 2020 00:31

Export record

Altmetrics

Contributors

Author: David Docquier
Author: Jeremy P. Grist
Author: Malcolm J. Roberts
Author: Christopher D. Roberts
Author: Tido Semmler
Author: Leandro Ponsoni
Author: François Massonnet
Author: Dmitry Sidorenko
Author: Dmitry V. Sein
Author: Doroteaciro Iovino
Author: Alessio Bellucci
Author: Thierry Fichefet

University divisions

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.

×