Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation
International audience We present the first simulation of the last 6000 years with a version of the IPSL Earth system model that includes interactive dynamical vegetation and carbon cycle. It is discussed in the light of a set of Mid-Holocene and preindustrial simulations performed to set up the mod...
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ftinsu:oai:HAL:hal-03018647v1 2024-04-28T08:38:00+00:00 Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation Braconnot, Pascale Zhu, Dan Marti, Olivier Servonnat, Jérôme 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) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) 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)) 2019 https://hal.science/hal-03018647 https://hal.science/hal-03018647/document https://hal.science/hal-03018647/file/cp-15-997-2019.pdf https://doi.org/10.5194/cp-15-997-2019 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-15-997-2019 hal-03018647 https://hal.science/hal-03018647 https://hal.science/hal-03018647/document https://hal.science/hal-03018647/file/cp-15-997-2019.pdf doi:10.5194/cp-15-997-2019 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-03018647 Climate of the Past, 2019, ⟨10.5194/cp-15-997-2019⟩ [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 2019 ftinsu https://doi.org/10.5194/cp-15-997-2019 2024-04-05T00:40:08Z International audience We present the first simulation of the last 6000 years with a version of the IPSL Earth system model that includes interactive dynamical vegetation and carbon cycle. It is discussed in the light of a set of Mid-Holocene and preindustrial simulations performed to set up the model version and to initialize the dynamical vegetation. These sensitivity experiments remind us that model quality or realism is not only a function of model parameterizations and tunings but also of experimental setup. The transient simulations shows that the long-term trends in temperature and precipitation have a similar shape to the insolation forcing, except at the Equator, at high latitudes, and south of 40 • S. In these regions cloud cover, sea ice, snow, or ocean heat content feedbacks lead to smaller or opposite temperature responses. The long-term trend in tree line in the Northern Hemisphere is reproduced and starts earlier than the southward shift in vegetation over the Sahel. Despite little change in forest cover over Eurasia, a long-term change in forest composition is simulated, including large centennial variability. The rapid increase in atmospheric CO 2 in the last centuries of the simulation enhances tree growth and counteracts the long-term trends induced by Holocene insolation in the Northern Hemisphere and amplifies it in the Southern Hemisphere. We also highlight some limits in the evaluation of such a simulation resulting from model climate-vegetation biases, the difficulty of fully assessing the result for preindustrial or modern conditions that are affected by land use, and the possibility of multi-vegetation states under modern conditions. Article in Journal/Newspaper Sea ice Institut national des sciences de l'Univers: HAL-INSU Climate of the Past 15 3 997 1024 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[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 Braconnot, Pascale Zhu, Dan Marti, Olivier Servonnat, Jérôme Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience We present the first simulation of the last 6000 years with a version of the IPSL Earth system model that includes interactive dynamical vegetation and carbon cycle. It is discussed in the light of a set of Mid-Holocene and preindustrial simulations performed to set up the model version and to initialize the dynamical vegetation. These sensitivity experiments remind us that model quality or realism is not only a function of model parameterizations and tunings but also of experimental setup. The transient simulations shows that the long-term trends in temperature and precipitation have a similar shape to the insolation forcing, except at the Equator, at high latitudes, and south of 40 • S. In these regions cloud cover, sea ice, snow, or ocean heat content feedbacks lead to smaller or opposite temperature responses. The long-term trend in tree line in the Northern Hemisphere is reproduced and starts earlier than the southward shift in vegetation over the Sahel. Despite little change in forest cover over Eurasia, a long-term change in forest composition is simulated, including large centennial variability. The rapid increase in atmospheric CO 2 in the last centuries of the simulation enhances tree growth and counteracts the long-term trends induced by Holocene insolation in the Northern Hemisphere and amplifies it in the Southern Hemisphere. We also highlight some limits in the evaluation of such a simulation resulting from model climate-vegetation biases, the difficulty of fully assessing the result for preindustrial or modern conditions that are affected by land use, and the possibility of multi-vegetation states under modern conditions. |
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) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) 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 |
Braconnot, Pascale Zhu, Dan Marti, Olivier Servonnat, Jérôme |
author_facet |
Braconnot, Pascale Zhu, Dan Marti, Olivier Servonnat, Jérôme |
author_sort |
Braconnot, Pascale |
title |
Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
title_short |
Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
title_full |
Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
title_fullStr |
Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
title_full_unstemmed |
Strengths and challenges for transient Mid-to Late Holocene simulations with dynamical vegetation |
title_sort |
strengths and challenges for transient mid-to late holocene simulations with dynamical vegetation |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-03018647 https://hal.science/hal-03018647/document https://hal.science/hal-03018647/file/cp-15-997-2019.pdf https://doi.org/10.5194/cp-15-997-2019 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-03018647 Climate of the Past, 2019, ⟨10.5194/cp-15-997-2019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-15-997-2019 hal-03018647 https://hal.science/hal-03018647 https://hal.science/hal-03018647/document https://hal.science/hal-03018647/file/cp-15-997-2019.pdf doi:10.5194/cp-15-997-2019 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-15-997-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
3 |
container_start_page |
997 |
op_container_end_page |
1024 |
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1797569213834985472 |