Representing explicit budburst and senescence processes for evergreen conifers in global models

Global ecosystem models lack an explicit representation of budburst and senescence for evergreen conifers despite their primordial role in the carbon cycle. In this study we evaluated eight different budburst models, combining forcing, chilling and photoperiod, for their ability to describe spring b...

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Autores: Peaucelle, Marc|||0000-0003-0324-4628, Ciais, Philippe|||0000-0001-8560-4943, Maignant, Fabienne, Nicolas, Manuel|||0000-0002-0885-1227, Cecchini, Sébastien, Viovy, Nicolas|||0000-0002-9197-6417
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:200857
Acceso en línea:https://ddd.uab.cat/record/200857
https://dx.doi.org/urn:doi:10.1016/j.agrformet.2018.12.008
Access Level:acceso abierto
Palabra clave:Tree phenology
Needle budburst
Needle senescence
Evergreen needleleaves
Ecosystem model
RENECOFOR
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repository_id_str
spelling Representing explicit budburst and senescence processes for evergreen conifers in global modelsPeaucelle, Marc|||0000-0003-0324-4628Ciais, Philippe|||0000-0001-8560-4943Maignant, FabienneNicolas, Manuel|||0000-0002-0885-1227Cecchini, SébastienViovy, Nicolas|||0000-0002-9197-6417Tree phenologyNeedle budburstNeedle senescenceEvergreen needleleavesEcosystem modelRENECOFORGlobal ecosystem models lack an explicit representation of budburst and senescence for evergreen conifers despite their primordial role in the carbon cycle. In this study we evaluated eight different budburst models, combining forcing, chilling and photoperiod, for their ability to describe spring budburst, and one model of needle senescence for temperate evergreen coniferous forests. The models' parameters were optimized against field observations from a national forest monitoring network in France. The best fitting budburst model was determined according to a new metrics which accounts for both temporal and spatial variabilities of budburst events across sites. The best model could reproduce observed budburst dates both at the site scale (±5 days) and at regional scale (±12 days). We also showed that the budburst models parameterized at site scale lose some predictive capability when applied at coarser spatial resolution, e.g., in grid-based simulations. The selected budburst model was then coupled to a senescence function defined from needle survivorship observations in order to describe the full phenology cycle of coniferous forests. Implemented in the process-driven ecosystem model ORCHIDEE, this new conifer phenology module represented accurately the intra and inter-annual dynamics of leaf area index at both the local and regional scales when compared against MODIS remote sensing observations. A sensitivity analysis showed only a small impact of the new budburst model on the timing of the seasonal cycle of photosynthesis (GPP). Yet, due to the faster renewal of needles compared to the standard version of ORCHIDEE, we simulated an increase in the GPP by on average 15% over France, while the simulated needle turnover was doubled. Compared to 1970-2000, projections indicated an advancement of the budburst date of 10.3 ± 2.8 and 12.3 ± 4.1 days in average over the period 2060-2100 with the best forcing and chilling-forcing models respectively. Our study suggests that including an explicit simulation of needle budburst and senescence for evergreen conifers in global terrestrial ecosystem models may significantly impact future projections of carbon budgets. 22019-01-0120192019-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/200857https://dx.doi.org/urn:doi:10.1016/j.agrformet.2018.12.008reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 610028open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2008572026-06-06T12:50:31Z
dc.title.none.fl_str_mv Representing explicit budburst and senescence processes for evergreen conifers in global models
title Representing explicit budburst and senescence processes for evergreen conifers in global models
spellingShingle Representing explicit budburst and senescence processes for evergreen conifers in global models
Peaucelle, Marc|||0000-0003-0324-4628
Tree phenology
Needle budburst
Needle senescence
Evergreen needleleaves
Ecosystem model
RENECOFOR
title_short Representing explicit budburst and senescence processes for evergreen conifers in global models
title_full Representing explicit budburst and senescence processes for evergreen conifers in global models
title_fullStr Representing explicit budburst and senescence processes for evergreen conifers in global models
title_full_unstemmed Representing explicit budburst and senescence processes for evergreen conifers in global models
title_sort Representing explicit budburst and senescence processes for evergreen conifers in global models
dc.creator.none.fl_str_mv Peaucelle, Marc|||0000-0003-0324-4628
Ciais, Philippe|||0000-0001-8560-4943
Maignant, Fabienne
Nicolas, Manuel|||0000-0002-0885-1227
Cecchini, Sébastien
Viovy, Nicolas|||0000-0002-9197-6417
author Peaucelle, Marc|||0000-0003-0324-4628
author_facet Peaucelle, Marc|||0000-0003-0324-4628
Ciais, Philippe|||0000-0001-8560-4943
Maignant, Fabienne
Nicolas, Manuel|||0000-0002-0885-1227
Cecchini, Sébastien
Viovy, Nicolas|||0000-0002-9197-6417
author_role author
author2 Ciais, Philippe|||0000-0001-8560-4943
Maignant, Fabienne
Nicolas, Manuel|||0000-0002-0885-1227
Cecchini, Sébastien
Viovy, Nicolas|||0000-0002-9197-6417
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Tree phenology
Needle budburst
Needle senescence
Evergreen needleleaves
Ecosystem model
RENECOFOR
topic Tree phenology
Needle budburst
Needle senescence
Evergreen needleleaves
Ecosystem model
RENECOFOR
description Global ecosystem models lack an explicit representation of budburst and senescence for evergreen conifers despite their primordial role in the carbon cycle. In this study we evaluated eight different budburst models, combining forcing, chilling and photoperiod, for their ability to describe spring budburst, and one model of needle senescence for temperate evergreen coniferous forests. The models' parameters were optimized against field observations from a national forest monitoring network in France. The best fitting budburst model was determined according to a new metrics which accounts for both temporal and spatial variabilities of budburst events across sites. The best model could reproduce observed budburst dates both at the site scale (±5 days) and at regional scale (±12 days). We also showed that the budburst models parameterized at site scale lose some predictive capability when applied at coarser spatial resolution, e.g., in grid-based simulations. The selected budburst model was then coupled to a senescence function defined from needle survivorship observations in order to describe the full phenology cycle of coniferous forests. Implemented in the process-driven ecosystem model ORCHIDEE, this new conifer phenology module represented accurately the intra and inter-annual dynamics of leaf area index at both the local and regional scales when compared against MODIS remote sensing observations. A sensitivity analysis showed only a small impact of the new budburst model on the timing of the seasonal cycle of photosynthesis (GPP). Yet, due to the faster renewal of needles compared to the standard version of ORCHIDEE, we simulated an increase in the GPP by on average 15% over France, while the simulated needle turnover was doubled. Compared to 1970-2000, projections indicated an advancement of the budburst date of 10.3 ± 2.8 and 12.3 ± 4.1 days in average over the period 2060-2100 with the best forcing and chilling-forcing models respectively. Our study suggests that including an explicit simulation of needle budburst and senescence for evergreen conifers in global terrestrial ecosystem models may significantly impact future projections of carbon budgets.
publishDate 2019
dc.date.none.fl_str_mv 2
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/200857
https://dx.doi.org/urn:doi:10.1016/j.agrformet.2018.12.008
url https://ddd.uab.cat/record/200857
https://dx.doi.org/urn:doi:10.1016/j.agrformet.2018.12.008
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 610028
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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