NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution
An established iceberg module, ICB, is used interactively with the Nucleus for European Modelling of the Ocean (NEMO) ocean model in a new implementation, NEMO–ICB (v1.0). A 30-year hindcast (1976–2005) simulation with an eddy-permitting (0.25°) global configuration of NEMO–ICB is undertaken to eval...
Published in: | Geoscientific Model Development |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/512441/ https://nora.nerc.ac.uk/id/eprint/512441/1/gmd-8-1547-2015.pdf https://doi.org/10.5194/gmd-8-1547-2015 |
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ftnerc:oai:nora.nerc.ac.uk:512441 2023-05-15T13:49:32+02:00 NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution Marsh, R. Ivchenko, V.O. Skliris, N. Alderson, S. Bigg, G.R. Madec, G. Blaker, A.T. Aksenov, Y. Sinha, B. Coward, A.C. Le Sommer, J. Merino, N. Zalesny, V.B. 2015-05-27 text http://nora.nerc.ac.uk/id/eprint/512441/ https://nora.nerc.ac.uk/id/eprint/512441/1/gmd-8-1547-2015.pdf https://doi.org/10.5194/gmd-8-1547-2015 en eng https://nora.nerc.ac.uk/id/eprint/512441/1/gmd-8-1547-2015.pdf Marsh, R.; Ivchenko, V.O.; Skliris, N.; Alderson, S.; Bigg, G.R.; Madec, G.; Blaker, A.T. orcid:0000-0001-5454-0131 Aksenov, Y. orcid:0000-0001-6132-3434 Sinha, B.; Coward, A.C. orcid:0000-0002-9111-7700 Le Sommer, J.; Merino, N.; Zalesny, V.B. 2015 NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution. Geoscientific Model Development, 8 (5). 1547-1562. https://doi.org/10.5194/gmd-8-1547-2015 <https://doi.org/10.5194/gmd-8-1547-2015> cc_by CC-BY Marine Sciences Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.5194/gmd-8-1547-2015 2023-02-04T19:42:27Z An established iceberg module, ICB, is used interactively with the Nucleus for European Modelling of the Ocean (NEMO) ocean model in a new implementation, NEMO–ICB (v1.0). A 30-year hindcast (1976–2005) simulation with an eddy-permitting (0.25°) global configuration of NEMO–ICB is undertaken to evaluate the influence of icebergs on sea ice, hydrography, mixed layer depths (MLDs), and ocean currents, through comparison with a control simulation in which the equivalent iceberg mass flux is applied as coastal runoff, a common forcing in ocean models. In the Southern Hemisphere (SH), drift and melting of icebergs are in balance after around 5 years, whereas the equilibration timescale for the Northern Hemisphere (NH) is 15–20 years. Iceberg drift patterns, and Southern Ocean iceberg mass, compare favourably with available observations. Freshwater forcing due to iceberg melting is most pronounced very locally, in the coastal zone around much of Antarctica, where it often exceeds in magnitude and opposes the negative freshwater fluxes associated with sea ice freezing. However, at most locations in the polar Southern Ocean, the annual-mean freshwater flux due to icebergs, if present, is typically an order of magnitude smaller than the contribution of sea ice melting and precipitation. A notable exception is the southwest Atlantic sector of the Southern Ocean, where iceberg melting reaches around 50% of net precipitation over a large area. Including icebergs in place of coastal runoff, sea ice concentration and thickness are notably decreased at most locations around Antarctica, by up to ~ 20% in the eastern Weddell Sea, with more limited increases, of up to ~ 10% in the Bellingshausen Sea. Antarctic sea ice mass decreases by 2.9%, overall. As a consequence of changes in net freshwater forcing and sea ice, salinity and temperature distributions are also substantially altered. Surface salinity increases by ~ 0.1 psu around much of Antarctica, due to suppressed coastal runoff, with extensive freshening at depth, extending ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea Iceberg* Sea ice Southern Ocean Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Weddell Sea Bellingshausen Sea Weddell Geoscientific Model Development 8 5 1547 1562 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Marsh, R. Ivchenko, V.O. Skliris, N. Alderson, S. Bigg, G.R. Madec, G. Blaker, A.T. Aksenov, Y. Sinha, B. Coward, A.C. Le Sommer, J. Merino, N. Zalesny, V.B. NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
topic_facet |
Marine Sciences |
description |
An established iceberg module, ICB, is used interactively with the Nucleus for European Modelling of the Ocean (NEMO) ocean model in a new implementation, NEMO–ICB (v1.0). A 30-year hindcast (1976–2005) simulation with an eddy-permitting (0.25°) global configuration of NEMO–ICB is undertaken to evaluate the influence of icebergs on sea ice, hydrography, mixed layer depths (MLDs), and ocean currents, through comparison with a control simulation in which the equivalent iceberg mass flux is applied as coastal runoff, a common forcing in ocean models. In the Southern Hemisphere (SH), drift and melting of icebergs are in balance after around 5 years, whereas the equilibration timescale for the Northern Hemisphere (NH) is 15–20 years. Iceberg drift patterns, and Southern Ocean iceberg mass, compare favourably with available observations. Freshwater forcing due to iceberg melting is most pronounced very locally, in the coastal zone around much of Antarctica, where it often exceeds in magnitude and opposes the negative freshwater fluxes associated with sea ice freezing. However, at most locations in the polar Southern Ocean, the annual-mean freshwater flux due to icebergs, if present, is typically an order of magnitude smaller than the contribution of sea ice melting and precipitation. A notable exception is the southwest Atlantic sector of the Southern Ocean, where iceberg melting reaches around 50% of net precipitation over a large area. Including icebergs in place of coastal runoff, sea ice concentration and thickness are notably decreased at most locations around Antarctica, by up to ~ 20% in the eastern Weddell Sea, with more limited increases, of up to ~ 10% in the Bellingshausen Sea. Antarctic sea ice mass decreases by 2.9%, overall. As a consequence of changes in net freshwater forcing and sea ice, salinity and temperature distributions are also substantially altered. Surface salinity increases by ~ 0.1 psu around much of Antarctica, due to suppressed coastal runoff, with extensive freshening at depth, extending ... |
format |
Article in Journal/Newspaper |
author |
Marsh, R. Ivchenko, V.O. Skliris, N. Alderson, S. Bigg, G.R. Madec, G. Blaker, A.T. Aksenov, Y. Sinha, B. Coward, A.C. Le Sommer, J. Merino, N. Zalesny, V.B. |
author_facet |
Marsh, R. Ivchenko, V.O. Skliris, N. Alderson, S. Bigg, G.R. Madec, G. Blaker, A.T. Aksenov, Y. Sinha, B. Coward, A.C. Le Sommer, J. Merino, N. Zalesny, V.B. |
author_sort |
Marsh, R. |
title |
NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
title_short |
NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
title_full |
NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
title_fullStr |
NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
title_full_unstemmed |
NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution |
title_sort |
nemo–icb (v1.0): interactive icebergs in the nemo ocean model globally configured at eddy-permitting resolution |
publishDate |
2015 |
url |
http://nora.nerc.ac.uk/id/eprint/512441/ https://nora.nerc.ac.uk/id/eprint/512441/1/gmd-8-1547-2015.pdf https://doi.org/10.5194/gmd-8-1547-2015 |
geographic |
Antarctic Southern Ocean Weddell Sea Bellingshausen Sea Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Bellingshausen Sea Weddell |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Iceberg* Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Iceberg* Sea ice Southern Ocean Weddell Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/512441/1/gmd-8-1547-2015.pdf Marsh, R.; Ivchenko, V.O.; Skliris, N.; Alderson, S.; Bigg, G.R.; Madec, G.; Blaker, A.T. orcid:0000-0001-5454-0131 Aksenov, Y. orcid:0000-0001-6132-3434 Sinha, B.; Coward, A.C. orcid:0000-0002-9111-7700 Le Sommer, J.; Merino, N.; Zalesny, V.B. 2015 NEMO–ICB (v1.0): interactive icebergs in the NEMO ocean model globally configured at eddy-permitting resolution. Geoscientific Model Development, 8 (5). 1547-1562. https://doi.org/10.5194/gmd-8-1547-2015 <https://doi.org/10.5194/gmd-8-1547-2015> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/gmd-8-1547-2015 |
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Geoscientific Model Development |
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5 |
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1547 |
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