Confronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought

Confronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought

© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1990. - 200(2013), 2 vom: 06. Okt., Seite 350-365
1. Verfasser: Powell, Thomas L (VerfasserIn)
Weitere Verfasser: Galbraith, David R, Christoffersen, Bradley O, Harper, Anna, Imbuzeiro, Hewlley M A, Rowland, Lucy, Almeida, Samuel, Brando, Paulo M, da Costa, Antonio Carlos Lola, Costa, Marcos Heil, Levine, Naomi M, Malhi, Yadvinder, Saleska, Scott R, Sotta, Eleneide, Williams, Mathew, Meir, Patrick, Moorcroft, Paul R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Evaluation Study Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Amazon carbon cycle drought terrestrial biosphere model throughfall exclusion tropical rainforest mehr... Soil Water 059QF0KO0R Carbon Dioxide 142M471B3J Carbon 7440-44-0 Oxygen S88TT14065
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100 1 |a Powell, Thomas L  |e verfasserin  |4 aut 
245 1 0 |a Confronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought 
264 1 |c 2013 
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500 |a Date Completed 15.04.2014 
500 |a Date Revised 09.03.2022 
500 |a published: Print-Electronic 
500 |a CommentIn: New Phytol. 2013 Oct;200(2):298-300. doi: 10.1111/nph.12450. - PMID 24050631 
500 |a Citation Status MEDLINE 
520 |a © 2013 The Authors. New Phytologist © 2013 New Phytologist Trust. 
520 |a Considerable uncertainty surrounds the fate of Amazon rainforests in response to climate change. Here, carbon (C) flux predictions of five terrestrial biosphere models (Community Land Model version 3.5 (CLM3.5), Ecosystem Demography model version 2.1 (ED2), Integrated BIosphere Simulator version 2.6.4 (IBIS), Joint UK Land Environment Simulator version 2.1 (JULES) and Simple Biosphere model version 3 (SiB3)) and a hydrodynamic terrestrial ecosystem model (the Soil-Plant-Atmosphere (SPA) model) were evaluated against measurements from two large-scale Amazon drought experiments. Model predictions agreed with the observed C fluxes in the control plots of both experiments, but poorly replicated the responses to the drought treatments. Most notably, with the exception of ED2, the models predicted negligible reductions in aboveground biomass in response to the drought treatments, which was in contrast to an observed c. 20% reduction at both sites. For ED2, the timing of the decline in aboveground biomass was accurate, but the magnitude was too high for one site and too low for the other. Three key findings indicate critical areas for future research and model development. First, the models predicted declines in autotrophic respiration under prolonged drought in contrast to measured increases at one of the sites. Secondly, models lacking a phenological response to drought introduced bias in the sensitivity of canopy productivity and respiration to drought. Thirdly, the phenomenological water-stress functions used by the terrestrial biosphere models to represent the effects of soil moisture on stomatal conductance yielded unrealistic diurnal and seasonal responses to drought 
650 4 |a Evaluation Study 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
650 4 |a Amazon 
650 4 |a carbon cycle 
650 4 |a drought 
650 4 |a terrestrial biosphere model 
650 4 |a throughfall exclusion 
650 4 |a tropical rainforest 
650 7 |a Soil  |2 NLM 
650 7 |a Water  |2 NLM 
650 7 |a 059QF0KO0R  |2 NLM 
650 7 |a Carbon Dioxide  |2 NLM 
650 7 |a 142M471B3J  |2 NLM 
650 7 |a Carbon  |2 NLM 
650 7 |a 7440-44-0  |2 NLM 
650 7 |a Oxygen  |2 NLM 
650 7 |a S88TT14065  |2 NLM 
700 1 |a Galbraith, David R  |e verfasserin  |4 aut 
700 1 |a Christoffersen, Bradley O  |e verfasserin  |4 aut 
700 1 |a Harper, Anna  |e verfasserin  |4 aut 
700 1 |a Imbuzeiro, Hewlley M A  |e verfasserin  |4 aut 
700 1 |a Rowland, Lucy  |e verfasserin  |4 aut 
700 1 |a Almeida, Samuel  |e verfasserin  |4 aut 
700 1 |a Brando, Paulo M  |e verfasserin  |4 aut 
700 1 |a da Costa, Antonio Carlos Lola  |e verfasserin  |4 aut 
700 1 |a Costa, Marcos Heil  |e verfasserin  |4 aut 
700 1 |a Levine, Naomi M  |e verfasserin  |4 aut 
700 1 |a Malhi, Yadvinder  |e verfasserin  |4 aut 
700 1 |a Saleska, Scott R  |e verfasserin  |4 aut 
700 1 |a Sotta, Eleneide  |e verfasserin  |4 aut 
700 1 |a Williams, Mathew  |e verfasserin  |4 aut 
700 1 |a Meir, Patrick  |e verfasserin  |4 aut 
700 1 |a Moorcroft, Paul R  |e verfasserin  |4 aut 
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