Climate drivers of the Amazon forest greening

Wagner Fabien, Herault Bruno, Rossi Vivien, Hilker Thomas, Maeda Eduardo Eiji, Sanchez Alber, Lyapustin Alexei I., Galvão Lênio Soares, Wang Yujie, Aragao Luiz E.O.C.. 2017. Climate drivers of the Amazon forest greening. PloS One, 12 (7):e0180932, 15 p.

Url - jeu de données - Entrepôt autre : https://figshare.com/articles/Climate_drivers_of_the_Amazon_forest_greening/5210521

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Résumé : Our limited understanding of the climate controls on tropical forest seasonality is one of the biggest sources of uncertainty in modeling climate change impacts on terrestrial ecosystems. Combining leaf production, litterfall and climate observations from satellite and ground data in the Amazon forest, we show that seasonal variation in leaf production is largely triggered by climate signals, specifically, insolation increase (70.4% of the total area) and precipitation increase (29.6%). Increase of insolation drives leaf growth in the absence of water limitation. For these non-water-limited forests, the simultaneous leaf flush occurs in a sufficient proportion of the trees to be observed from space. While tropical cycles are generally defined in terms of dry or wet season, we show that for a large part of Amazonia the increase in insolation triggers the visible progress of leaf growth, just like during spring in temperate forests. The dependence of leaf growth initiation on climate seasonality may result in a higher sensitivity of these ecosystems to changes in climate than previously thought.

Mots-clés Agrovoc : forêt tropicale humide, écosystème forestier, changement climatique, feuille, croissance, couverture végétale, photosynthèse, saison, indicateur biologique

Mots-clés géographiques Agrovoc : Amazonie, Brésil, Guyane française, France

Classification Agris : K01 - Foresterie - Considérations générales
P40 - Météorologie et climatologie
F62 - Physiologie végétale - Croissance et développement

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

• Wagner Fabien, INPE (BRA)
• Herault Bruno, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0002-6950-7286
• Rossi Vivien, CIRAD-ES-UPR BSef (CMR) ORCID: 0000-0001-5458-1523
• Hilker Thomas, Southampton University (GBR)
• Maeda Eduardo Eiji, University of Helsinki (FIN)
• Sanchez Alber, INPE (BRA)
• Lyapustin Alexei I., NASA (USA)
• Galvão Lênio Soares, INPE (BRA)
• Wang Yujie, NASA (USA)
• Aragao Luiz E.O.C., INPE (BRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/585103/)

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