Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study
Recent modelling studies have indicated that icebergs play an active role in the climate system as they interact with the ocean and the atmosphere. The icebergs' impact is due to their slowly released meltwater, which freshens and cools the ocean and consequently alters the ocean stratification...
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Online Access: | https://research.vu.nl/en/publications/06fb7ba9-9022-46e1-868c-5cc02b023170 https://doi.org/10.5194/gmd-8-2139-2015 https://hdl.handle.net/1871.1/06fb7ba9-9022-46e1-868c-5cc02b023170 http://www.geosci-model-dev-discuss.net/7/4353/2014/ |
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ftvuamstcris:oai:research.vu.nl:publications/06fb7ba9-9022-46e1-868c-5cc02b023170 2024-06-23T07:53:15+00:00 Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study Bügelmayer, M. Roche, D.M.V.A.P. Renssen, H. 2015-07-17 https://research.vu.nl/en/publications/06fb7ba9-9022-46e1-868c-5cc02b023170 https://doi.org/10.5194/gmd-8-2139-2015 https://hdl.handle.net/1871.1/06fb7ba9-9022-46e1-868c-5cc02b023170 http://www.geosci-model-dev-discuss.net/7/4353/2014/ eng eng https://research.vu.nl/en/publications/06fb7ba9-9022-46e1-868c-5cc02b023170 info:eu-repo/semantics/openAccess Bügelmayer , M , Roche , D M V A P & Renssen , H 2015 , ' Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study ' , Geoscientific Model Development , vol. 8 , no. 7 , pp. 2139-2151 . https://doi.org/10.5194/gmd-8-2139-2015 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2015 ftvuamstcris https://doi.org/10.5194/gmd-8-2139-2015 2024-06-12T23:55:53Z Recent modelling studies have indicated that icebergs play an active role in the climate system as they interact with the ocean and the atmosphere. The icebergs' impact is due to their slowly released meltwater, which freshens and cools the ocean and consequently alters the ocean stratification and the sea-ice conditions. The spatial distribution of the icebergs and their meltwater depends on the atmospheric and oceanic forces acting on them as well as on the initial icebergs' size. The studies conducted so far have in common that the icebergs were moved by reconstructed or modelled forcing fields and that the initial size distribution of the icebergs was prescribed according to present-day observations. To study the sensitivity of the modelled iceberg distribution to initial and boundary conditions, we performed 15 sensitivity experiments using the iLOVECLIM climate model that includes actively coupled ice sheet and iceberg modules, to analyse (1) the impact of the atmospheric and oceanic forces on the iceberg transport, mass and melt flux distribution, and (2) the effect of the initial iceberg size on the resulting Northern Hemisphere climate including the Greenland ice sheet, due to feedback mechanisms such as altered atmospheric temperatures, under different climate conditions (pre-industrial, high/low radiative forcing). Our results show that, under equilibrated pre-industrial conditions, the oceanic currents cause the icebergs to stay close to the Greenland and North American coast, whereas the atmospheric forcing quickly distributes them further away from their calving site. Icebergs remaining close to Greenland last up to 2 years longer as they reside in generally cooler waters. Moreover, we find that local variations in the spatial distribution due to different iceberg sizes do not result in different climate states and Greenland ice sheet volume, independent of the prevailing climate conditions (pre-industrial, warming or cooling climate). Therefore, we conclude that local differences in the ... Article in Journal/Newspaper Greenland Ice Sheet Sea ice Vrije Universiteit Amsterdam (VU): Research Portal Greenland Geoscientific Model Development 8 7 2139 2151 |
institution |
Open Polar |
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Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Bügelmayer, M. Roche, D.M.V.A.P. Renssen, H. Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Recent modelling studies have indicated that icebergs play an active role in the climate system as they interact with the ocean and the atmosphere. The icebergs' impact is due to their slowly released meltwater, which freshens and cools the ocean and consequently alters the ocean stratification and the sea-ice conditions. The spatial distribution of the icebergs and their meltwater depends on the atmospheric and oceanic forces acting on them as well as on the initial icebergs' size. The studies conducted so far have in common that the icebergs were moved by reconstructed or modelled forcing fields and that the initial size distribution of the icebergs was prescribed according to present-day observations. To study the sensitivity of the modelled iceberg distribution to initial and boundary conditions, we performed 15 sensitivity experiments using the iLOVECLIM climate model that includes actively coupled ice sheet and iceberg modules, to analyse (1) the impact of the atmospheric and oceanic forces on the iceberg transport, mass and melt flux distribution, and (2) the effect of the initial iceberg size on the resulting Northern Hemisphere climate including the Greenland ice sheet, due to feedback mechanisms such as altered atmospheric temperatures, under different climate conditions (pre-industrial, high/low radiative forcing). Our results show that, under equilibrated pre-industrial conditions, the oceanic currents cause the icebergs to stay close to the Greenland and North American coast, whereas the atmospheric forcing quickly distributes them further away from their calving site. Icebergs remaining close to Greenland last up to 2 years longer as they reside in generally cooler waters. Moreover, we find that local variations in the spatial distribution due to different iceberg sizes do not result in different climate states and Greenland ice sheet volume, independent of the prevailing climate conditions (pre-industrial, warming or cooling climate). Therefore, we conclude that local differences in the ... |
format |
Article in Journal/Newspaper |
author |
Bügelmayer, M. Roche, D.M.V.A.P. Renssen, H. |
author_facet |
Bügelmayer, M. Roche, D.M.V.A.P. Renssen, H. |
author_sort |
Bügelmayer, M. |
title |
Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
title_short |
Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
title_full |
Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
title_fullStr |
Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
title_full_unstemmed |
Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study |
title_sort |
representing icebergs in the iloveclim model (version 1.0) - a sensitivity study |
publishDate |
2015 |
url |
https://research.vu.nl/en/publications/06fb7ba9-9022-46e1-868c-5cc02b023170 https://doi.org/10.5194/gmd-8-2139-2015 https://hdl.handle.net/1871.1/06fb7ba9-9022-46e1-868c-5cc02b023170 http://www.geosci-model-dev-discuss.net/7/4353/2014/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Sea ice |
genre_facet |
Greenland Ice Sheet Sea ice |
op_source |
Bügelmayer , M , Roche , D M V A P & Renssen , H 2015 , ' Representing icebergs in the iLOVECLIM model (version 1.0) - a sensitivity study ' , Geoscientific Model Development , vol. 8 , no. 7 , pp. 2139-2151 . https://doi.org/10.5194/gmd-8-2139-2015 |
op_relation |
https://research.vu.nl/en/publications/06fb7ba9-9022-46e1-868c-5cc02b023170 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/gmd-8-2139-2015 |
container_title |
Geoscientific Model Development |
container_volume |
8 |
container_issue |
7 |
container_start_page |
2139 |
op_container_end_page |
2151 |
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1802644820172210176 |