CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model
The terrestrial biosphere is exposed to land-use and climate change, which not only affects vegetation dynamics but also changes land–atmosphere feedbacks. Specifically, changes in land cover affect biophysical feedbacks of water and energy, thereby contributing to climate change. In this study, we...
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ftcopernicus:oai:publications.copernicus.org:gmd92020 2023-05-15T17:58:21+02:00 CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model Drüke, Markus Bloh, Werner Petri, Stefan Sakschewski, Boris Schaphoff, Sibyll Forkel, Matthias Huiskamp, Willem Feulner, Georg Thonicke, Kirsten 2021-07-01 application/pdf https://doi.org/10.5194/gmd-14-4117-2021 https://gmd.copernicus.org/articles/14/4117/2021/ eng eng doi:10.5194/gmd-14-4117-2021 https://gmd.copernicus.org/articles/14/4117/2021/ eISSN: 1991-9603 Text 2021 ftcopernicus https://doi.org/10.5194/gmd-14-4117-2021 2021-07-05T16:22:14Z The terrestrial biosphere is exposed to land-use and climate change, which not only affects vegetation dynamics but also changes land–atmosphere feedbacks. Specifically, changes in land cover affect biophysical feedbacks of water and energy, thereby contributing to climate change. In this study, we couple the well-established and comprehensively validated dynamic global vegetation model LPJmL5 (Lund–Potsdam–Jena managed Land) to the coupled climate model CM2Mc, the latter of which is based on the atmosphere model AM2 and the ocean model MOM5 (Modular Ocean Model 5), and name it CM2Mc-LPJmL. In CM2Mc, we replace the simple land-surface model LaD (Land Dynamics; where vegetation is static and prescribed) with LPJmL5, and we fully couple the water and energy cycles using the Geophysical Fluid Dynamics Laboratory (GFDL) Flexible Modeling System (FMS). Several improvements to LPJmL5 were implemented to allow a fully functional biophysical coupling. These include a sub-daily cycle for calculating energy and water fluxes, conductance of the soil evaporation and plant interception, canopy-layer humidity, and the surface energy balance in order to calculate the surface and canopy-layer temperature within LPJmL5. Exchanging LaD with LPJmL5 and, therefore, switching from a static and prescribed vegetation to a dynamic vegetation allows us to model important biospheric processes, including fire, mortality, permafrost, hydrological cycling and the impacts of managed land (crop growth and irrigation). Our results show that CM2Mc-LPJmL has similar temperature and precipitation biases to the original CM2Mc model with LaD. The performance of LPJmL5 in the coupled system compared to Earth observation data and to LPJmL offline simulation results is within acceptable error margins. The historical global mean temperature evolution of our model setup is within the range of CMIP5 (Coupled Model Intercomparison Project Phase 5) models. The comparison of model runs with and without land-use change shows a partially warmer and drier climate state across the global land surface. CM2Mc-LPJmL opens new opportunities to investigate important biophysical vegetation–climate feedbacks with a state-of-the-art and process-based dynamic vegetation model. Text permafrost Copernicus Publications: E-Journals Geoscientific Model Development 14 6 4117 4141 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The terrestrial biosphere is exposed to land-use and climate change, which not only affects vegetation dynamics but also changes land–atmosphere feedbacks. Specifically, changes in land cover affect biophysical feedbacks of water and energy, thereby contributing to climate change. In this study, we couple the well-established and comprehensively validated dynamic global vegetation model LPJmL5 (Lund–Potsdam–Jena managed Land) to the coupled climate model CM2Mc, the latter of which is based on the atmosphere model AM2 and the ocean model MOM5 (Modular Ocean Model 5), and name it CM2Mc-LPJmL. In CM2Mc, we replace the simple land-surface model LaD (Land Dynamics; where vegetation is static and prescribed) with LPJmL5, and we fully couple the water and energy cycles using the Geophysical Fluid Dynamics Laboratory (GFDL) Flexible Modeling System (FMS). Several improvements to LPJmL5 were implemented to allow a fully functional biophysical coupling. These include a sub-daily cycle for calculating energy and water fluxes, conductance of the soil evaporation and plant interception, canopy-layer humidity, and the surface energy balance in order to calculate the surface and canopy-layer temperature within LPJmL5. Exchanging LaD with LPJmL5 and, therefore, switching from a static and prescribed vegetation to a dynamic vegetation allows us to model important biospheric processes, including fire, mortality, permafrost, hydrological cycling and the impacts of managed land (crop growth and irrigation). Our results show that CM2Mc-LPJmL has similar temperature and precipitation biases to the original CM2Mc model with LaD. The performance of LPJmL5 in the coupled system compared to Earth observation data and to LPJmL offline simulation results is within acceptable error margins. The historical global mean temperature evolution of our model setup is within the range of CMIP5 (Coupled Model Intercomparison Project Phase 5) models. The comparison of model runs with and without land-use change shows a partially warmer and drier climate state across the global land surface. CM2Mc-LPJmL opens new opportunities to investigate important biophysical vegetation–climate feedbacks with a state-of-the-art and process-based dynamic vegetation model. |
format |
Text |
author |
Drüke, Markus Bloh, Werner Petri, Stefan Sakschewski, Boris Schaphoff, Sibyll Forkel, Matthias Huiskamp, Willem Feulner, Georg Thonicke, Kirsten |
spellingShingle |
Drüke, Markus Bloh, Werner Petri, Stefan Sakschewski, Boris Schaphoff, Sibyll Forkel, Matthias Huiskamp, Willem Feulner, Georg Thonicke, Kirsten CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
author_facet |
Drüke, Markus Bloh, Werner Petri, Stefan Sakschewski, Boris Schaphoff, Sibyll Forkel, Matthias Huiskamp, Willem Feulner, Georg Thonicke, Kirsten |
author_sort |
Drüke, Markus |
title |
CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
title_short |
CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
title_full |
CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
title_fullStr |
CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
title_full_unstemmed |
CM2Mc-LPJmL v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
title_sort |
cm2mc-lpjml v1.0: biophysical coupling of a process-based dynamic vegetation model with managed land to a general circulation model |
publishDate |
2021 |
url |
https://doi.org/10.5194/gmd-14-4117-2021 https://gmd.copernicus.org/articles/14/4117/2021/ |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-14-4117-2021 https://gmd.copernicus.org/articles/14/4117/2021/ |
op_doi |
https://doi.org/10.5194/gmd-14-4117-2021 |
container_title |
Geoscientific Model Development |
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14 |
container_issue |
6 |
container_start_page |
4117 |
op_container_end_page |
4141 |
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1766166943714246656 |