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| Registros recuperados : 100 | |
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| 62. | | NEGRÓN-JUÁREZ, R. I.; HOLM, J. A.; FAYBISHENKO, B.; MAGNABOSCO-MARRA, D.; FISHER, R. A.; SHUMAN, J. K.; ARAUJO, A. C. de; RILEY, W. J.; CHAMBERS, J. Q. Landsat near-infrared (NIR) band and ELM-FATES sensitivity to forest disturbances and regrowth in the Central Amazon. Biogeosciences, v. 17, n. 23, p. 6185-6205, 2020.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 63. | | SOUZA, G. N. B. de; ARAUJO, A. C. de; VASCONCELOS, S. S.; LEAL, L. do S. M.; PINTO, C. A. D.; COSTA, A. C. L. da. Influência da umidade do solo sobre a variação do efluxo de CO2 do solo na floresta nacional de Caxiuanã-PA. In: WORKSHOP BRASILEIRO DE MICROMETEOROLOGIA, 10., 2017, Santa Maria, RS. [Anais]. [Santa Maria: UFSM, 2017].| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 65. | | SÁ, T. D. de A.; ARAÚJO, A. C. de; OLIVEIRA, V. C. de; COIMBRA, H. M.; BRIENZA JUNIOR, S.; VIELHAUER, K. Spectral distribution of light in spontaneous and enriched fallow vegetation in NE Amazonia. In: SHIFT-WORKSHOP, 3., 1998, Manaus. Proceedings... Hamburg: GKSS, 1998. p. 161-168. il.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 66. | | SÁ, T. D. de A.; ARAUJO, A. C. de; OLIVEIRA, V. C. de; COIMBRA, H. M.; BRIENZA JUNIOR, S.; VIELHAUER, K. Spectral distribution of light in spontaneous and enriched fallow vegetation in NE Amazonia. In: SHIFT-WORKSHOP, 3., 1998, Manaus. Program, abstracts of presentation and posters. [S.l.]: SHIFT, 1998. A13.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 67. | | SA, T. D. de A.; ARAUJO, A. C. de; OLIVEIRA, V. C. de; COIMBRA, H. M.; BRIENZA JUNIOR, S.; VILHAUER, K. Spectral distribution of light in spontaneous and enriched fallow vegetation in NE Amazonia. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.161-168.| Biblioteca(s): Embrapa Florestas. |
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| 68. | | MAFRA, A. C. B.; ARAUJO, A. C. de; SÁ, L. D. de A.; SANTOS, R. M. N. dos; TREBS, I.; SÖRGEL, M. Variabilidade da concentração média de CO2 acima da floresta Amazônica durante a noite associada a distintos regimes turbulentos. Ciência e Natura, Santa Maria, v. 38, n. 1, p. 429-433, jan./abr. 2016.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 69. | | PANTOJA, C. dos A.; ARAUJO, A. C. de; SOUZA, C. M. de A.; YAKUWA, J. C. P.; MENDES, E. M. de O. Variação espaço-temporal das características térmico-hídricas do solo em sistema IPF no leste da Amazônia. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 24., 2020, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2023. p. 10-11. Pibic.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 70. | | TEIXEIRA, W. G.; PINA, A. J. de A.; BOARI, A. de J.; MARTINS, G. C.; LIMA, W. A. A. de; MUNIZ, R. S.; GONCALVES, A. O.; CUBAS ENCINAS, O.; ARAUJO, A. C. de. A hipótese abiótica como agente causal do amarelecimento fatal (AF) da palma de óleo (Elaeis guineensis Jacq.) no Brasil. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 36., 2017, Belém, PA. Amazônia e seus solos: peculiaridades e potencialidades. Belém, PA: SBCS, 2017.| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| 71. | | TEIXEIRA, W. G.; PINA, A. J. de A.; BOARI, A. de J.; MARTINS, G. C.; LIMA, W. A. A. de; MUNIZ, R. S.; GONCALVES, A. O.; CUBAS ENCINAS, O.; ARAUJO, A. C. de. A hipótese abiótica como agente causal do amarelecimento fatal (AF) da palma de óleo (Elaeis guineensis Jacq.) no Brasil. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 36., 2017, Belém, PA. Amazônia e seus solos: peculiaridades e potencialidades. Belém, PA: SBCS, 2017.| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Solos. |
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| 72. | | MALHI, Y.; MELACK, J.; GATTI, L. V.; OMETTO, J.; KESSELMEIER, J.; WOLFF, S.; ARAGÃO, L. E. O.; COSTA, M.; SALESKA, S.; PANGALA, S. R.; BASSO, L. S.; RIZZO, L.; ARAUJO, A. C. de; RESTREPO-COUPE, N. Biogeochemical cycles of the Amazon. In: SCIENCE panel for the Amazon: Amazon assessment report 2021: part I: The Amazon as a regional entity of the Earth system. New York, NY: United Nations Sustainable Development Solutions Network, 2021. Cap. 6, pag. irregular.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 73. | | QUERINO, C. A. S.; SMEETS, C. J. P. P.; VIGANO, I.; HOLZINGER, R.; MOURA, V.; GATTI, L. V.; MARTINEWSKI, A.; MANZI, A. O.; ARAUJO, A. C. de; RÖCKMANN, T. Methane flux, vertical gradient and mixing ratio measurements in a tropical forest. Atmospheric Chemistry and Physics Discussions, v. 11, p. 5313-5350, Feb. 2011.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 74. | | OLVEIRA, P. E. S.; ACEVEDO, O. C.; SÖRGEL, M.; TSOKANKUNKU, A.; WOLFF, S.; ARAUJO, A. C. de; SOUZA, R. A. F.; SÁ, M. O.; MANZI, A. O.; ANDREAE, M. O. Nighttime wind and scalar variability within and above an Amazonian canopy. Atmospheric Chemistry and Physics, v. 18, n. 5, p. 3083-3099, 2018.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 75. | | PENEIRAS, A. B. V.; MAYER, L. L.; FRENSEL, K. D.; ARAÚJO, A. C. de; LUCENA, R.; ESCUDINI, H.; ANDREWS, D.; FONSECA, J. F. da; CARDOSO, E. da C.; BRANDÃO, F. Z. Retorno da ciclicidade de ovelhas lactantes da raça Santa Inês até 105 dias pós-parto com amamentação contínua dos cordeiros em clima tropical quente úmido. In: CONGRESSO BRASILEIRO DE REPRODUÇÃO ANIMAL, 21., 2015, Belo Horizonte. Anais... Belo Horizonte: CBRA, 2015. p. 188.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 76. | | RESTREPO-COUPE, N.; CHRISTOFFERSEN, B. O.; LONGO, M.; ALVES, L. F.; CAMPOS, K. S.; ARAUJO, A. C. de; OLIVEIRA JUNIOR, R. C. de; PROHASKA, N.; SILVA, R. da; TAPAJOS, R.; WIEDEMANN, K. T.; WOFSY, S. C.; SALESKA, S. R. Asymmetric response of Amazon forest water and energy fluxes to wet and dry hydrological extremes reveals onset of a local drought-induced tipping point. Global Change Biology, v. 29, n. 21, p. 6077-6092, Nov. 2023.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 77. | | SMITH, M. N.; TAYLOR, T. C.; HAREN, J. van; ROSOLEM, R.; RESTREPO-COUPE, N.; ADAMS, J.; WU, J.; OLIVEIRA JUNIOR, R. C. de; SILVA, R. da; ARAUJO, A. C. de; CAMARGO, P. B. de; HUXMAN, T. E.; SALESKA, S. R. Empirical evidence for resilience of tropical forest photosynthesis in a warmer world. Nature Plants, v. 6, p. 1225-1230, 2020.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 78. | | PFANNERSTILL, E. Y.; REIJRINK, N. G.; EDTBAUER, A.; RINGSDORF, A.; ZANNONI, N.; ARAUJO, A. C. de; DITAS, F.; HOLANDA, B. A.; SÁ, M. O.; TSOKANKUNKU, A.; WALTER, D.; WOLFF, S.; LAVRIC, J. V.; PÖHLKER, C.; SÖRGEL, M.; WILLIAMS, J. Total OH reactivity over the Amazon rainforest: variability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure. Atmospheric Chemistry and Physics, v. 21, n. 8, p. 6231-6256, 2021.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 79. | | FONTES, C. G.; DAWSON, T. E.; JARDINE, K.; McDOWELL, N.; GIMENEZ, B. O.; ANDEREGG, L.; NEGRÓN-JUÁREZ, R.; HIGUCHI, N.; FINE, P. V. A.; ARAUJO, A. C. de; CHAMBERS, J. Q. Dry and hot: the hydraulic consequences of a climate change-type drought for Amazonian trees. Philosophical Transactions of the Royal Society B, v. 373, n. 1760, 2018.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 80. | | RINGSDORF, A.; EDTBAUER, A.; ARELLANO, J. V.-G. de; PFANNERSTILL, E. Y.; GROMOV, S.; KUMAR, V.; POZZER, A.; WOLFF, S.; TSOKANKUNKU, A.; SOERGEL, M.; SÁ, M. O.; ARAUJO, A. C. de; DITAS, F.; POEHLKER, C.; LELIEVELD, J.; WILLIAMS, J. Inferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements. Scientific Reports, v. 13, Article number: 14900, 2023.| Biblioteca(s): Embrapa Amazônia Oriental. |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
04/12/2023 |
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Data da última atualização: |
04/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
PFANNERSTILL, E. Y.; REIJRINK, N. G.; EDTBAUER, A.; RINGSDORF, A.; ZANNONI, N.; ARAUJO, A. C. de; DITAS, F.; HOLANDA, B. A.; SÁ, M. O.; TSOKANKUNKU, A.; WALTER, D.; WOLFF, S.; LAVRIC, J. V.; PÖHLKER, C.; SÖRGEL, M.; WILLIAMS, J. |
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Afiliação: |
EVA Y. PFANNERSTILL, Max Planck Institute for Chemistry; NINA G. REIJRINK, Max Planck Institute for Chemistry / IMT Lille Douai; ACHIM EDTBAUER, Max Planck Institute for Chemistry; AKIMA RINGSDORF, Max Planck Institute for Chemistry; NORA ZANNONI, Max Planck Institute for Chemistry; ALESSANDRO CARIOCA DE ARAUJO, CPATU; FLORIAN DITAS, Max Planck Institute for Chemistry; BRUNA A. HOLANDA, Max Planck Institute for Chemistry; MARTA O. SÁ, INPA; ANYWHERE TSOKANKUNKU, Max Planck Institute for Chemistry; DAVID WALTER, Max Planck Institute for Chemistry; STEFAN WOLFF, Max Planck Institute for Chemistry; JOŠT V. LAVRIC, Max Planck Institute for Biogeochemistry; CHRISTOPHER PÖHLKER, Max Planck Institute for Chemistry; MATTHIAS SÖRGEL, Max Planck Institute for Chemistry; JONATHAN WILLIAMS, Max Planck Institute for Chemistry / The Cyprus Institute. |
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Título: |
Total OH reactivity over the Amazon rainforest: variability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Atmospheric Chemistry and Physics, v. 21, n. 8, p. 6231-6256, 2021. |
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DOI: |
https://doi.org/10.5194/acp-21-6231-2021 |
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Idioma: |
Inglês |
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Conteúdo: |
The tropical forests are Earth's largest source of biogenic volatile organic compounds (BVOCs) and thus also the largest atmospheric sink region for the hydroxyl radical (OH). However, the OH sink above tropical forests is poorly understood, as past studies have revealed large unattributed fractions of total OH reactivity. We present the first total OH reactivity and volatile organic compound (VOC) measurements made at the Amazon Tall Tower Observatory (ATTO) at 80, 150, and 320 m above ground level, covering two dry seasons, one wet season, and one transition season in 2018-2019. By considering a wide range of previously unaccounted for VOCs, which we identified by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS), the unattributed fraction was with an overall average of 19 % within the measurement uncertainty of ~35 %. In terms of seasonal average OH reactivity, isoprene accounted for 23 %-43 % of the total and oxygenated VOCs (OVOCs) for 22 %-40 %, while monoterpenes, sesquiterpenes, and green leaf volatiles combined were responsible for 9 %-14 %. These findings show that OVOCs were until now an underestimated contributor to the OH sink above the Amazon forest. By day, total OH reactivity decreased towards higher altitudes with strongest vertical gradients observed around noon during the dry season (-0.026 s-1 m-1), while the gradient was inverted at night. Seasonal differences in total OH reactivity were observed, with the lowest daytime average and standard deviation of 19.9 ± 6.2 -1 during a wet-dry transition season with frequent precipitation; 23.7 ± 6.5 -1 during the wet season; and the highest average OH reactivities during two dry-season observation periods with 28.1 ± 7.9 -1 and 29.1 ± 10.8 -1, respectively. The effects of different environmental parameters on the OH sink were investigated, and quantified, where possible. Precipitation caused short-term spikes in total OH reactivity, which were followed by below-normal OH reactivity for several hours. Biomass burning increased total OH reactivity by 2.7 to 9.5 -1. We present a temperature-dependent parameterization of OH reactivity that could be applied in future models of the OH sink to further reduce our knowledge gaps in tropical-forest OH chemistry MenosThe tropical forests are Earth's largest source of biogenic volatile organic compounds (BVOCs) and thus also the largest atmospheric sink region for the hydroxyl radical (OH). However, the OH sink above tropical forests is poorly understood, as past studies have revealed large unattributed fractions of total OH reactivity. We present the first total OH reactivity and volatile organic compound (VOC) measurements made at the Amazon Tall Tower Observatory (ATTO) at 80, 150, and 320 m above ground level, covering two dry seasons, one wet season, and one transition season in 2018-2019. By considering a wide range of previously unaccounted for VOCs, which we identified by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS), the unattributed fraction was with an overall average of 19 % within the measurement uncertainty of ~35 %. In terms of seasonal average OH reactivity, isoprene accounted for 23 %-43 % of the total and oxygenated VOCs (OVOCs) for 22 %-40 %, while monoterpenes, sesquiterpenes, and green leaf volatiles combined were responsible for 9 %-14 %. These findings show that OVOCs were until now an underestimated contributor to the OH sink above the Amazon forest. By day, total OH reactivity decreased towards higher altitudes with strongest vertical gradients observed around noon during the dry season (-0.026 s-1 m-1), while the gradient was inverted at night. Seasonal differences in total OH reactivity were observed, with the lowest daytime average and ... Mostrar Tudo |
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Palavras-Chave: |
Compostos orgânicos voláteis. |
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Thesagro: |
Floresta Tropical. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159141/1/Total-OH.pdf
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Marc: |
LEADER 03354naa a2200349 a 4500
001 2159141
005 2023-12-04
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5194/acp-21-6231-2021$2DOI
100 1 $aPFANNERSTILL, E. Y.
245 $aTotal OH reactivity over the Amazon rainforest$bvariability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure.$h[electronic resource]
260 $c2021
520 $aThe tropical forests are Earth's largest source of biogenic volatile organic compounds (BVOCs) and thus also the largest atmospheric sink region for the hydroxyl radical (OH). However, the OH sink above tropical forests is poorly understood, as past studies have revealed large unattributed fractions of total OH reactivity. We present the first total OH reactivity and volatile organic compound (VOC) measurements made at the Amazon Tall Tower Observatory (ATTO) at 80, 150, and 320 m above ground level, covering two dry seasons, one wet season, and one transition season in 2018-2019. By considering a wide range of previously unaccounted for VOCs, which we identified by proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS), the unattributed fraction was with an overall average of 19 % within the measurement uncertainty of ~35 %. In terms of seasonal average OH reactivity, isoprene accounted for 23 %-43 % of the total and oxygenated VOCs (OVOCs) for 22 %-40 %, while monoterpenes, sesquiterpenes, and green leaf volatiles combined were responsible for 9 %-14 %. These findings show that OVOCs were until now an underestimated contributor to the OH sink above the Amazon forest. By day, total OH reactivity decreased towards higher altitudes with strongest vertical gradients observed around noon during the dry season (-0.026 s-1 m-1), while the gradient was inverted at night. Seasonal differences in total OH reactivity were observed, with the lowest daytime average and standard deviation of 19.9 ± 6.2 -1 during a wet-dry transition season with frequent precipitation; 23.7 ± 6.5 -1 during the wet season; and the highest average OH reactivities during two dry-season observation periods with 28.1 ± 7.9 -1 and 29.1 ± 10.8 -1, respectively. The effects of different environmental parameters on the OH sink were investigated, and quantified, where possible. Precipitation caused short-term spikes in total OH reactivity, which were followed by below-normal OH reactivity for several hours. Biomass burning increased total OH reactivity by 2.7 to 9.5 -1. We present a temperature-dependent parameterization of OH reactivity that could be applied in future models of the OH sink to further reduce our knowledge gaps in tropical-forest OH chemistry
650 $aAmazonia
650 $aFloresta Tropical
653 $aCompostos orgânicos voláteis
700 1 $aREIJRINK, N. G.
700 1 $aEDTBAUER, A.
700 1 $aRINGSDORF, A.
700 1 $aZANNONI, N.
700 1 $aARAUJO, A. C. de
700 1 $aDITAS, F.
700 1 $aHOLANDA, B. A.
700 1 $aSÁ, M. O.
700 1 $aTSOKANKUNKU, A.
700 1 $aWALTER, D.
700 1 $aWOLFF, S.
700 1 $aLAVRIC, J. V.
700 1 $aPÖHLKER, C.
700 1 $aSÖRGEL, M.
700 1 $aWILLIAMS, J.
773 $tAtmospheric Chemistry and Physics$gv. 21, n. 8, p. 6231-6256, 2021.
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