Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme
Climate evolution over the next ten to hundred years involves many questions, linked to the impact of man. Indeed, greenhouse gases emissions since the beginning of the industrial era lead to an increase in temperature. The latter can affect terrestrial ecosystems, particularly in boreal regions whe...
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Online Access: | https://theses.hal.science/tel-01654663 https://theses.hal.science/tel-01654663/document https://theses.hal.science/tel-01654663/file/DRUEL_2017_diffusion.pdf |
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ftinsu:oai:HAL:tel-01654663v1 2024-04-28T07:53:45+00:00 Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme Modélisation de la végétation boréale et de sa dynamique dans le modèle de surface continentale ORCHIDEE Druel, Arsène Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Université Grenoble Alpes Gerhard Krinner Philippe Peylin 2017-01-23 https://theses.hal.science/tel-01654663 https://theses.hal.science/tel-01654663/document https://theses.hal.science/tel-01654663/file/DRUEL_2017_diffusion.pdf fr fre HAL CCSD NNT: 2017GREAU014 tel-01654663 https://theses.hal.science/tel-01654663 https://theses.hal.science/tel-01654663/document https://theses.hal.science/tel-01654663/file/DRUEL_2017_diffusion.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01654663 Climatologie. Université Grenoble Alpes, 2017. Français. ⟨NNT : 2017GREAU014⟩ Climate modeling Vegetation dynamics Boreal vegetation Orchidee Land-Surface model Shrubs - Mosses - Lichens Modélisation climatique Dynamique de végétation Végétation boréale Modèle continental Buissons - Mousses - Lichen [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/doctoralThesis Theses 2017 ftinsu 2024-04-05T00:47:10Z Climate evolution over the next ten to hundred years involves many questions, linked to the impact of man. Indeed, greenhouse gases emissions since the beginning of the industrial era lead to an increase in temperature. The latter can affect terrestrial ecosystems, particularly in boreal regions where observed and projected temperature increase is larger than in mid-latitudes. Evolution of these ecosystems can trigger climate feedbacks. For example, the currently observed « Arctic greening » phenomenon could enhance the warming via a decrease in albedo due to the increase in vegetation cover. In order to address these questions, climate models were developped, including continental surface models taking into account the fluxes of mass and energy. In this thesis, such a model was used, the continental surface scheme ORCHIDEE, which includes a succinct description of boreal vegetation. The aim of this work was thus the implementation and the modeling of boreal vegetation.In order to describe high-latitude vegetation, i.e. toundras and steppes, new plant functional types (PFTs) were integrated into the model based on existing PFTs. First, non-vascular plants (NVPs) were integrated to represent lichens and bryophytes found in desert toundras and peatlands, then shrubs to represent an intermediate stratum between trees and grasses in toundras, and finally boreal C3 grasses to distinguish vegetation found in boreal steppes and temperate grasslands. The description of this boreal vegetation was accompanied by the integration of new charachteristic processes, from the implementation of new interactions such as the protection of shrubs by snow in winter, to the simple choice of new PFT parameters such as the lower photosynthetic capacity of boreal C3 grasses compared to temperate C3 grasses, through the modification of existing processes such as the stomatal conductance of NVPs. Other processes linked to vegetation were also updated or corrected. Finally, to model the dynamics of boreal vegetation, new PFTs were ... Doctoral or Postdoctoral Thesis albedo Arctic Greening Arctic Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
French |
topic |
Climate modeling Vegetation dynamics Boreal vegetation Orchidee Land-Surface model Shrubs - Mosses - Lichens Modélisation climatique Dynamique de végétation Végétation boréale Modèle continental Buissons - Mousses - Lichen [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Climate modeling Vegetation dynamics Boreal vegetation Orchidee Land-Surface model Shrubs - Mosses - Lichens Modélisation climatique Dynamique de végétation Végétation boréale Modèle continental Buissons - Mousses - Lichen [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology Druel, Arsène Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
topic_facet |
Climate modeling Vegetation dynamics Boreal vegetation Orchidee Land-Surface model Shrubs - Mosses - Lichens Modélisation climatique Dynamique de végétation Végétation boréale Modèle continental Buissons - Mousses - Lichen [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
Climate evolution over the next ten to hundred years involves many questions, linked to the impact of man. Indeed, greenhouse gases emissions since the beginning of the industrial era lead to an increase in temperature. The latter can affect terrestrial ecosystems, particularly in boreal regions where observed and projected temperature increase is larger than in mid-latitudes. Evolution of these ecosystems can trigger climate feedbacks. For example, the currently observed « Arctic greening » phenomenon could enhance the warming via a decrease in albedo due to the increase in vegetation cover. In order to address these questions, climate models were developped, including continental surface models taking into account the fluxes of mass and energy. In this thesis, such a model was used, the continental surface scheme ORCHIDEE, which includes a succinct description of boreal vegetation. The aim of this work was thus the implementation and the modeling of boreal vegetation.In order to describe high-latitude vegetation, i.e. toundras and steppes, new plant functional types (PFTs) were integrated into the model based on existing PFTs. First, non-vascular plants (NVPs) were integrated to represent lichens and bryophytes found in desert toundras and peatlands, then shrubs to represent an intermediate stratum between trees and grasses in toundras, and finally boreal C3 grasses to distinguish vegetation found in boreal steppes and temperate grasslands. The description of this boreal vegetation was accompanied by the integration of new charachteristic processes, from the implementation of new interactions such as the protection of shrubs by snow in winter, to the simple choice of new PFT parameters such as the lower photosynthetic capacity of boreal C3 grasses compared to temperate C3 grasses, through the modification of existing processes such as the stomatal conductance of NVPs. Other processes linked to vegetation were also updated or corrected. Finally, to model the dynamics of boreal vegetation, new PFTs were ... |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Université Grenoble Alpes Gerhard Krinner Philippe Peylin |
format |
Doctoral or Postdoctoral Thesis |
author |
Druel, Arsène |
author_facet |
Druel, Arsène |
author_sort |
Druel, Arsène |
title |
Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
title_short |
Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
title_full |
Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
title_fullStr |
Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
title_full_unstemmed |
Modeling of the boreal vegetation and its dynamics in the ORCHIDEE continental land surface scheme |
title_sort |
modeling of the boreal vegetation and its dynamics in the orchidee continental land surface scheme |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://theses.hal.science/tel-01654663 https://theses.hal.science/tel-01654663/document https://theses.hal.science/tel-01654663/file/DRUEL_2017_diffusion.pdf |
genre |
albedo Arctic Greening Arctic |
genre_facet |
albedo Arctic Greening Arctic |
op_source |
https://theses.hal.science/tel-01654663 Climatologie. Université Grenoble Alpes, 2017. Français. ⟨NNT : 2017GREAU014⟩ |
op_relation |
NNT: 2017GREAU014 tel-01654663 https://theses.hal.science/tel-01654663 https://theses.hal.science/tel-01654663/document https://theses.hal.science/tel-01654663/file/DRUEL_2017_diffusion.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797573149934485504 |