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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
04/09/2013 |
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Data da última atualização: |
04/09/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
POWELL, T. I.; GALBRAITH, D. R.; CHRISTOFFERSEN, B. O.; HARPER, A.; IMBUZEIRO, H. M. A.; ROWLAND, L.; ALMEIDA, S.; BRANDO, P. M.; COSTA, A. C. L. da; COSTA, M. H.; LEVINE, N. M.; MALHI, Y.; SALESKA, S. R.; SOTTA, E.; WILLIAMS, M.; MEIR, P.; MOORCROFT, P. R. |
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Afiliação: |
Thomas L. Powell, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA; David R. Galbraith, School of Geography, University of Leeds, Leeds, LS2 9JT, UK; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK; Bradley O. Christoffersen, Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA; Anna Harper, College of Engineering, Mathematics, and Physical Science, University of Exeter, Exeter, EX4 4QF, UK; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, USA; Hewlley M. A. Imbuzeiro, Grupo de Pesquisas em Interação Atmosfera-Biosfera, Universidade Federal de Vicosa, Vicosa, CEP 36570-000, Minas Gerias, Brazil; Lucy Rowland, School of GeoSciences, University of Edinburgh, Edinburgh, EH8 9XP, UK; Samuel Almeida, Museu Paraense Emilio Goeldi, Belem, CEP 66077-530, Para, Brazil; Paulo M. Brando, Instituto de Pesquisa Ambiental da Amazônia, CEP 71503-505, Brasilia, Distrito Federal, Brazil; Antonio Carlos Lola da Costa, Centro de Geociências, Universidade Federal do Para, Belem, CEP 66017-970, Para, Brazil; Marcos Heil Costa, Grupo de Pesquisas em Interac~ao Atmosfera-Biosfera, Universidade Federal de Vicosa, Vicosa, CEP 36570-000, Minas Gerias, Brazil; Naomi M. Levine, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA; Yadvinder Malhi, Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK; Scott R. Saleska, Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA; ELENEIDE DOFF SOTTA, CPAF-AP; Mathew Williams, School of GeoSciences, University of Edinburgh, Edinburgh, EH8 9XP, UK; Patrick Meir, School of GeoSciences, University of Edinburgh, Edinburgh, EH8 9XP, UK; Paul R. Moorcroft, Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA. |
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Título: |
Confronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
New Phytologist, Cambridge, Jul. 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
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. MenosConsiderable 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 phenomenolog... Mostrar Tudo |
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Palavras-Chave: |
Ciclo do cabono; Modelo de biosfera terrestre; Terrestrial biosphere model; Tropical rainforest. |
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Thesagro: |
Floresta tropical. |
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Thesaurus Nal: |
carbon cycle. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/89031/1/CPAFAP-2013-Confronting-model-predictions-of-carbon.pdf
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Marc: |
LEADER 02802naa a2200385 a 4500
001 1965567
005 2013-09-04
008 2013 bl uuuu u00u1 u #d
100 1 $aPOWELL, T. I.
245 $aConfronting model predictions of carbon fluxes with measurements of Amazon forests subjected to experimental drought.$h[electronic resource]
260 $c2013
520 $aConsiderable 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 $acarbon cycle
650 $aFloresta tropical
653 $aCiclo do cabono
653 $aModelo de biosfera terrestre
653 $aTerrestrial biosphere model
653 $aTropical rainforest
700 1 $aGALBRAITH, D. R.
700 1 $aCHRISTOFFERSEN, B. O.
700 1 $aHARPER, A.
700 1 $aIMBUZEIRO, H. M. A.
700 1 $aROWLAND, L.
700 1 $aALMEIDA, S.
700 1 $aBRANDO, P. M.
700 1 $aCOSTA, A. C. L. da
700 1 $aCOSTA, M. H.
700 1 $aLEVINE, N. M.
700 1 $aMALHI, Y.
700 1 $aSALESKA, S. R.
700 1 $aSOTTA, E.
700 1 $aWILLIAMS, M.
700 1 $aMEIR, P.
700 1 $aMOORCROFT, P. R.
773 $tNew Phytologist, Cambridge, Jul. 2013.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
13/08/2010 |
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Data da última atualização: |
10/10/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
LEAO, P. C. de S. |
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Afiliação: |
PATRICIA COELHO DE SOUZA LEAO, CPATSA. |
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Título: |
Table grapes production in the São Francisco River Valley, Northeast Brazil. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: INTERNATIONAL TABLE GRAPE SYMPOSIUM, 6., 2010, Davis. Proceedings... Davis: University of California, 2010. |
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Páginas: |
p. 126. |
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Idioma: |
Inglês |
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Conteúdo: |
table grapes are cultivated in different Brazilian States. The most important production regions are Southeast, Northeast and South. Northeast region stands out as the main region producing and exporting table grapes in Brazil. The specie grown is Vitis vinifera and the most important cultivars are 'Italia' and its color mutations 'Benitaka' and 'Brazil', as well as, 'Red Globe', the seedless cultivars are 'Sugraone', 'Thompson Seedless', and 'Crimson Seedless'. The vines are usually spaced 3 to 4 m between rows and 1.5 to 3 between vines, which corresponds a density between 952 up to 3,333 plants/ha. |
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Palavras-Chave: |
Uva de mesa; Vale do São Francisco. |
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Thesagro: |
Produção; Uva. |
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Thesaurus NAL: |
Grapes. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/133448/1/ID-43400.pdf
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Marc: |
LEADER 01163nam a2200181 a 4500
001 1859930
005 2023-10-10
008 2010 bl uuuu u00u1 u #d
100 1 $aLEAO, P. C. de S.
245 $aTable grapes production in the São Francisco River Valley, Northeast Brazil.
260 $aIn: INTERNATIONAL TABLE GRAPE SYMPOSIUM, 6., 2010, Davis. Proceedings... Davis: University of California$c2010
300 $ap. 126.
520 $atable grapes are cultivated in different Brazilian States. The most important production regions are Southeast, Northeast and South. Northeast region stands out as the main region producing and exporting table grapes in Brazil. The specie grown is Vitis vinifera and the most important cultivars are 'Italia' and its color mutations 'Benitaka' and 'Brazil', as well as, 'Red Globe', the seedless cultivars are 'Sugraone', 'Thompson Seedless', and 'Crimson Seedless'. The vines are usually spaced 3 to 4 m between rows and 1.5 to 3 between vines, which corresponds a density between 952 up to 3,333 plants/ha.
650 $aGrapes
650 $aProdução
650 $aUva
653 $aUva de mesa
653 $aVale do São Francisco
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Embrapa Semiárido (CPATSA) |
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