Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study
International audience 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 t...
Published in: | Geoscientific Model Development |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://hal.science/hal-01806128 https://hal.science/hal-01806128/document https://hal.science/hal-01806128/file/gmd-8-2139-2015.pdf https://doi.org/10.5194/gmd-8-2139-2015 |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Bügelmayer, M. Roche, Didier M. Renssen, H. Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience 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 Green-land 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 ... |
author2 |
Vrije Universiteit Amsterdam Amsterdam (VU) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Bügelmayer, M. Roche, Didier M. Renssen, H. |
author_facet |
Bügelmayer, M. Roche, Didier M. Renssen, H. |
author_sort |
Bügelmayer, M. |
title |
Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
title_short |
Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
title_full |
Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
title_fullStr |
Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
title_full_unstemmed |
Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study |
title_sort |
representing icebergs in the i loveclim model (version 1.0) – a sensitivity study |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01806128 https://hal.science/hal-01806128/document https://hal.science/hal-01806128/file/gmd-8-2139-2015.pdf https://doi.org/10.5194/gmd-8-2139-2015 |
genre |
Greenland Ice Sheet Sea ice |
genre_facet |
Greenland Ice Sheet Sea ice |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-01806128 Geoscientific Model Development, 2015, 8 (7), pp.2139 - 2151. ⟨10.5194/gmd-8-2139-2015⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-8-2139-2015 hal-01806128 https://hal.science/hal-01806128 https://hal.science/hal-01806128/document https://hal.science/hal-01806128/file/gmd-8-2139-2015.pdf doi:10.5194/gmd-8-2139-2015 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-8-2139-2015 |
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Geoscientific Model Development |
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7 |
container_start_page |
2139 |
op_container_end_page |
2151 |
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1797583749004656640 |
spelling |
ftuniversailles:oai:HAL:hal-01806128v1 2024-04-28T08:21:22+00:00 Representing icebergs in the i LOVECLIM model (version 1.0) – a sensitivity study Bügelmayer, M. Roche, Didier M. Renssen, H. Vrije Universiteit Amsterdam Amsterdam (VU) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2015 https://hal.science/hal-01806128 https://hal.science/hal-01806128/document https://hal.science/hal-01806128/file/gmd-8-2139-2015.pdf https://doi.org/10.5194/gmd-8-2139-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-8-2139-2015 hal-01806128 https://hal.science/hal-01806128 https://hal.science/hal-01806128/document https://hal.science/hal-01806128/file/gmd-8-2139-2015.pdf doi:10.5194/gmd-8-2139-2015 info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-01806128 Geoscientific Model Development, 2015, 8 (7), pp.2139 - 2151. ⟨10.5194/gmd-8-2139-2015⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2015 ftuniversailles https://doi.org/10.5194/gmd-8-2139-2015 2024-04-04T17:35:12Z International audience 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 Green-land 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 ... Article in Journal/Newspaper Greenland Ice Sheet Sea ice Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Geoscientific Model Development 8 7 2139 2151 |