Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro
As temperatures decrease in autumn, vegetation of temperate and boreal ecosystems increases its tolerance to freezing. This process, known as hardening, results in a set of physiological changes at the molecular level that initiate modifications of cell membrane composition and the synthesis of anti...
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ftcopernicus:oai:publications.copernicus.org:gmd103469 2023-05-15T15:08:16+02:00 Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro Lambert, Marius S. A. Tang, Hui Aas, Kjetil S. Stordal, Frode Fisher, Rosie A. Fang, Yilin Ding, Junyan Parmentier, Frans-Jan W. 2022-12-09 application/pdf https://doi.org/10.5194/gmd-15-8809-2022 https://gmd.copernicus.org/articles/15/8809/2022/ eng eng doi:10.5194/gmd-15-8809-2022 https://gmd.copernicus.org/articles/15/8809/2022/ eISSN: 1991-9603 Text 2022 ftcopernicus https://doi.org/10.5194/gmd-15-8809-2022 2022-12-12T17:22:41Z As temperatures decrease in autumn, vegetation of temperate and boreal ecosystems increases its tolerance to freezing. This process, known as hardening, results in a set of physiological changes at the molecular level that initiate modifications of cell membrane composition and the synthesis of anti-freeze proteins. Together with the freezing of extracellular water, anti-freeze proteins reduce plant water potentials and xylem conductivity. To represent the responses of vegetation to climate change, land surface schemes increasingly employ “hydrodynamic” models that represent the explicit fluxes of water from soil and through plants. The functioning of such schemes under frozen soil conditions, however, is poorly understood. Nonetheless, hydraulic processes are of major importance in the dynamics of these systems, which can suffer from, e.g., winter “frost drought” events. In this study, we implement a scheme that represents hardening into CLM5.0-FATES-Hydro. FATES-Hydro is a plant hydrodynamics module in FATES, a cohort model of vegetation physiology, growth, and dynamics hosted in CLM5.0. We find that, in frozen systems, it is necessary to introduce reductions in plant water loss associated with hardening to prevent winter desiccation. This work makes it possible to use CLM5.0-FATES-Hydro to model realistic impacts from frost droughts on vegetation growth and photosynthesis, leading to more reliable projections of how northern ecosystems respond to climate change. Text Arctic Climate change Copernicus Publications: E-Journals Arctic Geoscientific Model Development 15 23 8809 8829 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
As temperatures decrease in autumn, vegetation of temperate and boreal ecosystems increases its tolerance to freezing. This process, known as hardening, results in a set of physiological changes at the molecular level that initiate modifications of cell membrane composition and the synthesis of anti-freeze proteins. Together with the freezing of extracellular water, anti-freeze proteins reduce plant water potentials and xylem conductivity. To represent the responses of vegetation to climate change, land surface schemes increasingly employ “hydrodynamic” models that represent the explicit fluxes of water from soil and through plants. The functioning of such schemes under frozen soil conditions, however, is poorly understood. Nonetheless, hydraulic processes are of major importance in the dynamics of these systems, which can suffer from, e.g., winter “frost drought” events. In this study, we implement a scheme that represents hardening into CLM5.0-FATES-Hydro. FATES-Hydro is a plant hydrodynamics module in FATES, a cohort model of vegetation physiology, growth, and dynamics hosted in CLM5.0. We find that, in frozen systems, it is necessary to introduce reductions in plant water loss associated with hardening to prevent winter desiccation. This work makes it possible to use CLM5.0-FATES-Hydro to model realistic impacts from frost droughts on vegetation growth and photosynthesis, leading to more reliable projections of how northern ecosystems respond to climate change. |
format |
Text |
author |
Lambert, Marius S. A. Tang, Hui Aas, Kjetil S. Stordal, Frode Fisher, Rosie A. Fang, Yilin Ding, Junyan Parmentier, Frans-Jan W. |
spellingShingle |
Lambert, Marius S. A. Tang, Hui Aas, Kjetil S. Stordal, Frode Fisher, Rosie A. Fang, Yilin Ding, Junyan Parmentier, Frans-Jan W. Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
author_facet |
Lambert, Marius S. A. Tang, Hui Aas, Kjetil S. Stordal, Frode Fisher, Rosie A. Fang, Yilin Ding, Junyan Parmentier, Frans-Jan W. |
author_sort |
Lambert, Marius S. A. |
title |
Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
title_short |
Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
title_full |
Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
title_fullStr |
Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
title_full_unstemmed |
Inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the Arctic–boreal zone in CLM5.0-FATES-Hydro |
title_sort |
inclusion of a cold hardening scheme to represent frost tolerance is essential to model realistic plant hydraulics in the arctic–boreal zone in clm5.0-fates-hydro |
publishDate |
2022 |
url |
https://doi.org/10.5194/gmd-15-8809-2022 https://gmd.copernicus.org/articles/15/8809/2022/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-15-8809-2022 https://gmd.copernicus.org/articles/15/8809/2022/ |
op_doi |
https://doi.org/10.5194/gmd-15-8809-2022 |
container_title |
Geoscientific Model Development |
container_volume |
15 |
container_issue |
23 |
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8809 |
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8829 |
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1766339653683642368 |