A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective
International audience Abstract. The last deglaciation (∼20–11 ka BP) is a period of a major, long-term climate transition from a glacial to interglacial state that features multiple centennial- to decadal-scale abrupt climate variations whose root cause is still not fully understood. To better unde...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , , , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2024
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Subjects: | |
Online Access: | https://hal.science/hal-04574842 https://hal.science/hal-04574842/document https://hal.science/hal-04574842/file/cp-20-789-2024.pdf https://doi.org/10.5194/cp-20-789-2024 |
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Archives ouvertes de Paris-Saclay |
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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 |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Snoll, Brooke Ivanovic, Ruza Gregoire, Lauren Sherriff-Tadano, Sam Menviel, Laurie Obase, Takashi Abe-Ouchi, Ayako Bouttes, Nathaelle He, Chengfei He, Feng Kapsch, Marie Mikolajewicz, Uwe Muglia, Juan Valdes, Paul A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Abstract. The last deglaciation (∼20–11 ka BP) is a period of a major, long-term climate transition from a glacial to interglacial state that features multiple centennial- to decadal-scale abrupt climate variations whose root cause is still not fully understood. To better understand this time period, the Paleoclimate Modelling Intercomparison Project (PMIP) has provided a framework for an internationally coordinated endeavour in simulating the last deglaciation whilst encompassing a broad range of models. Here, we present a multi-model intercomparison of 17 transient simulations of the early part of the last deglaciation (∼20–15 ka BP) from nine different climate models spanning a range of model complexities and uncertain boundary conditions and forcings. The numerous simulations available provide the opportunity to better understand the chain of events and mechanisms of climate changes between 20 and 15 ka BP and our collective ability to simulate them. We conclude that the amount of freshwater forcing and whether it follows the ice sheet reconstruction or induces an inferred Atlantic meridional overturning circulation (AMOC) history, heavily impacts the deglacial climate evolution for each simulation rather than differences in the model physics. The course of the deglaciation is consistent between simulations except when the freshwater forcing is above 0.1 Sv – at least 70 % of the simulations agree that there is warming by 15 ka BP in most places excluding the location of meltwater input. For simulations with freshwater forcings that exceed 0.1 Sv from 18 ka BP, warming is delayed in the North Atlantic and surface air temperature correlations with AMOC strength are much higher. However, we find that the state of the AMOC coming out of the Last Glacial Maximum (LGM) also plays a key role in the AMOC sensitivity to model forcings. In addition, we show that the response of each model to the chosen meltwater scenario depends largely on the sensitivity of the model to the freshwater ... |
author2 |
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 |
Snoll, Brooke Ivanovic, Ruza Gregoire, Lauren Sherriff-Tadano, Sam Menviel, Laurie Obase, Takashi Abe-Ouchi, Ayako Bouttes, Nathaelle He, Chengfei He, Feng Kapsch, Marie Mikolajewicz, Uwe Muglia, Juan Valdes, Paul |
author_facet |
Snoll, Brooke Ivanovic, Ruza Gregoire, Lauren Sherriff-Tadano, Sam Menviel, Laurie Obase, Takashi Abe-Ouchi, Ayako Bouttes, Nathaelle He, Chengfei He, Feng Kapsch, Marie Mikolajewicz, Uwe Muglia, Juan Valdes, Paul |
author_sort |
Snoll, Brooke |
title |
A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
title_short |
A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
title_full |
A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
title_fullStr |
A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
title_full_unstemmed |
A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective |
title_sort |
multi-model assessment of the early last deglaciation (pmip4 ldv1): a meltwater perspective |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04574842 https://hal.science/hal-04574842/document https://hal.science/hal-04574842/file/cp-20-789-2024.pdf https://doi.org/10.5194/cp-20-789-2024 |
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ENVELOPE(162.000,162.000,-76.550,-76.550) |
geographic |
Endeavour |
geographic_facet |
Endeavour |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-04574842 Climate of the Past, 2024, 20 (4), pp.789 - 815. ⟨10.5194/cp-20-789-2024⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-20-789-2024 hal-04574842 https://hal.science/hal-04574842 https://hal.science/hal-04574842/document https://hal.science/hal-04574842/file/cp-20-789-2024.pdf doi:10.5194/cp-20-789-2024 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-20-789-2024 |
container_title |
Climate of the Past |
container_volume |
20 |
container_issue |
4 |
container_start_page |
789 |
op_container_end_page |
815 |
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1811639710243618816 |
spelling |
ftuniparissaclay:oai:HAL:hal-04574842v1 2024-09-30T14:36:42+00:00 A multi-model assessment of the early last deglaciation (PMIP4 LDv1): a meltwater perspective Snoll, Brooke Ivanovic, Ruza Gregoire, Lauren Sherriff-Tadano, Sam Menviel, Laurie Obase, Takashi Abe-Ouchi, Ayako Bouttes, Nathaelle He, Chengfei He, Feng Kapsch, Marie Mikolajewicz, Uwe Muglia, Juan Valdes, Paul 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)) 2024-04-05 https://hal.science/hal-04574842 https://hal.science/hal-04574842/document https://hal.science/hal-04574842/file/cp-20-789-2024.pdf https://doi.org/10.5194/cp-20-789-2024 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-20-789-2024 hal-04574842 https://hal.science/hal-04574842 https://hal.science/hal-04574842/document https://hal.science/hal-04574842/file/cp-20-789-2024.pdf doi:10.5194/cp-20-789-2024 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-04574842 Climate of the Past, 2024, 20 (4), pp.789 - 815. ⟨10.5194/cp-20-789-2024⟩ [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 2024 ftuniparissaclay https://doi.org/10.5194/cp-20-789-2024 2024-09-06T00:30:26Z International audience Abstract. The last deglaciation (∼20–11 ka BP) is a period of a major, long-term climate transition from a glacial to interglacial state that features multiple centennial- to decadal-scale abrupt climate variations whose root cause is still not fully understood. To better understand this time period, the Paleoclimate Modelling Intercomparison Project (PMIP) has provided a framework for an internationally coordinated endeavour in simulating the last deglaciation whilst encompassing a broad range of models. Here, we present a multi-model intercomparison of 17 transient simulations of the early part of the last deglaciation (∼20–15 ka BP) from nine different climate models spanning a range of model complexities and uncertain boundary conditions and forcings. The numerous simulations available provide the opportunity to better understand the chain of events and mechanisms of climate changes between 20 and 15 ka BP and our collective ability to simulate them. We conclude that the amount of freshwater forcing and whether it follows the ice sheet reconstruction or induces an inferred Atlantic meridional overturning circulation (AMOC) history, heavily impacts the deglacial climate evolution for each simulation rather than differences in the model physics. The course of the deglaciation is consistent between simulations except when the freshwater forcing is above 0.1 Sv – at least 70 % of the simulations agree that there is warming by 15 ka BP in most places excluding the location of meltwater input. For simulations with freshwater forcings that exceed 0.1 Sv from 18 ka BP, warming is delayed in the North Atlantic and surface air temperature correlations with AMOC strength are much higher. However, we find that the state of the AMOC coming out of the Last Glacial Maximum (LGM) also plays a key role in the AMOC sensitivity to model forcings. In addition, we show that the response of each model to the chosen meltwater scenario depends largely on the sensitivity of the model to the freshwater ... Article in Journal/Newspaper Ice Sheet North Atlantic Archives ouvertes de Paris-Saclay Endeavour ENVELOPE(162.000,162.000,-76.550,-76.550) Climate of the Past 20 4 789 815 |