Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements
The fixation of carbon in tropical forests mainly occurs through the production of wood and leaves, both being the principal components of net primary production. Currently field and satellite observations are independently used to describe the forest carbon cycle, but the link between satellite-derived forest phenology and field-derived forest productivity remains opaque. We used a unique combination of a MODIS EVI dataset, a climate-explicit wood production model and direct litterfall observations at an intra-annual time scale in order to question the synchronism of leaf and wood production in tropical forests. Even though leaf and wood biomass fluxes had the same range (respectively 2.4 ± 1.4 Mg C ha?1yr?1 and 2.2 ± 0.4 Mg C ha?1yr?1), they occured separately in time. EVI increased with the magnitude of leaf renewal at the beginning of the dry season when solar irradiance was at its maximum. At this time, wood production stopped. At the onset of the rainy season when new leaves were fully mature and water available again, wood production quickly increased to reach its maximum in less than a month, reflecting a change in carbon allocation from short lived pools (leaves) to long lived pools (wood). The time lag between peaks of EVI and wood production (109 days) revealed a substantial decoupling between the irradiance-driven leaf renewal and the water-driven wood production. Our work is a first attempt to link EVI data, wood production and leaf phenology at a seasonal time scale in a tropical evergreen rainforest and pave the way to develop more sophisticated global carbon cycle models in tropical forests.
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dig-cirad-fr-5694762024-01-28T21:28:02Z http://agritrop.cirad.fr/569476/ http://agritrop.cirad.fr/569476/ Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements. Wagner Fabien, Rossi Vivien, Stahl Clément, Bonnal Damien, Hérault Bruno. 2013. Biogeosciences Discussions, 10 (5) : 8247-8281.https://doi.org/10.5194/bgd-10-8247-2013 <https://doi.org/10.5194/bgd-10-8247-2013> Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements Wagner, Fabien Rossi, Vivien Stahl, Clément Bonnal, Damien Hérault, Bruno eng 2013 Biogeosciences Discussions K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 The fixation of carbon in tropical forests mainly occurs through the production of wood and leaves, both being the principal components of net primary production. Currently field and satellite observations are independently used to describe the forest carbon cycle, but the link between satellite-derived forest phenology and field-derived forest productivity remains opaque. We used a unique combination of a MODIS EVI dataset, a climate-explicit wood production model and direct litterfall observations at an intra-annual time scale in order to question the synchronism of leaf and wood production in tropical forests. Even though leaf and wood biomass fluxes had the same range (respectively 2.4 ± 1.4 Mg C ha?1yr?1 and 2.2 ± 0.4 Mg C ha?1yr?1), they occured separately in time. EVI increased with the magnitude of leaf renewal at the beginning of the dry season when solar irradiance was at its maximum. At this time, wood production stopped. At the onset of the rainy season when new leaves were fully mature and water available again, wood production quickly increased to reach its maximum in less than a month, reflecting a change in carbon allocation from short lived pools (leaves) to long lived pools (wood). The time lag between peaks of EVI and wood production (109 days) revealed a substantial decoupling between the irradiance-driven leaf renewal and the water-driven wood production. Our work is a first attempt to link EVI data, wood production and leaf phenology at a seasonal time scale in a tropical evergreen rainforest and pave the way to develop more sophisticated global carbon cycle models in tropical forests. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/569476/1/document_569476.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.5194/bgd-10-8247-2013 10.5194/bgd-10-8247-2013 info:eu-repo/semantics/altIdentifier/doi/10.5194/bgd-10-8247-2013 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.5194/bgd-10-8247-2013 |
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K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 |
spellingShingle |
K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 Wagner, Fabien Rossi, Vivien Stahl, Clément Bonnal, Damien Hérault, Bruno Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
description |
The fixation of carbon in tropical forests mainly occurs through the production of wood and leaves, both being the principal components of net primary production. Currently field and satellite observations are independently used to describe the forest carbon cycle, but the link between satellite-derived forest phenology and field-derived forest productivity remains opaque. We used a unique combination of a MODIS EVI dataset, a climate-explicit wood production model and direct litterfall observations at an intra-annual time scale in order to question the synchronism of leaf and wood production in tropical forests. Even though leaf and wood biomass fluxes had the same range (respectively 2.4 ± 1.4 Mg C ha?1yr?1 and 2.2 ± 0.4 Mg C ha?1yr?1), they occured separately in time. EVI increased with the magnitude of leaf renewal at the beginning of the dry season when solar irradiance was at its maximum. At this time, wood production stopped. At the onset of the rainy season when new leaves were fully mature and water available again, wood production quickly increased to reach its maximum in less than a month, reflecting a change in carbon allocation from short lived pools (leaves) to long lived pools (wood). The time lag between peaks of EVI and wood production (109 days) revealed a substantial decoupling between the irradiance-driven leaf renewal and the water-driven wood production. Our work is a first attempt to link EVI data, wood production and leaf phenology at a seasonal time scale in a tropical evergreen rainforest and pave the way to develop more sophisticated global carbon cycle models in tropical forests. |
format |
article |
topic_facet |
K10 - Production forestière U30 - Méthodes de recherche U10 - Informatique, mathématiques et statistiques P40 - Météorologie et climatologie forêt tropicale production forestière bois feuille cycle du carbone mesure (activité) télédétection analyse d'image analyse de données modèle mathématique modèle de simulation stockage carbone séquestration du carbone changement climatique http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_3061 http://aims.fao.org/aos/agrovoc/c_8421 http://aims.fao.org/aos/agrovoc/c_4243 http://aims.fao.org/aos/agrovoc/c_17299 http://aims.fao.org/aos/agrovoc/c_4668 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_36762 http://aims.fao.org/aos/agrovoc/c_15962 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_7427 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_331583 http://aims.fao.org/aos/agrovoc/c_1666 |
author |
Wagner, Fabien Rossi, Vivien Stahl, Clément Bonnal, Damien Hérault, Bruno |
author_facet |
Wagner, Fabien Rossi, Vivien Stahl, Clément Bonnal, Damien Hérault, Bruno |
author_sort |
Wagner, Fabien |
title |
Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
title_short |
Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
title_full |
Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
title_fullStr |
Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
title_full_unstemmed |
Asynchronism in leaf and wood production in tropical forests: A study combining satellite and ground-based measurements |
title_sort |
asynchronism in leaf and wood production in tropical forests: a study combining satellite and ground-based measurements |
url |
http://agritrop.cirad.fr/569476/ http://agritrop.cirad.fr/569476/1/document_569476.pdf |
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