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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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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 84 | |
| 5. |  | ARAUJO, A. C. de; RANDOW, C. von; RESTREPO-COUPE, N. Ecosystem-atmosphere exchanges of CO2 in dense and open 'terra firme' rainforests in Brazilian Amazonia. In: NAGY, L.; FORSBERG, B. R.; ARTAXO, P. (Ed.). Interactions between biosphere, atmosphere and human land use in the Amazon basin. [S.l.]: Springer, 2016. Cap. 8, p. 149-169. (Ecological Studies, 227).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 10. | | ARAUJO, A. C. de; COIMBRA, H. M.; MOLLER, M. R. F.; SÁ, T. D. de A. Aspectos térmicos do solo em sistemas rotacionais de agricultura no nordeste do Pará. In: CONGRESSO BRASILEIRO DE INICIAÇÃO CIENTÍFICA EM CIÊNCIAS AGRÁRIAS, 16., 1996, Santa Maria, RS. Os desafios da iniciação científica para o desenvolvimento social, frente à globalização: resumos. Santa Maria: UFSM, 1997. p. 209.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
|  |
| 11. | | ARAÚJO, A. C. de; OLIVEIRA, V. C. de; SÁ, T. D. de A.; BRIENZA JUNIOR, S. Aspecto biofísico de vegetação secundária enriquecida com leguminosas de rápido crescimento no nordeste do Pará: composição espectral da luz. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA PARA O PROGRESSO DA CIÊNCIA, 49., 1997, Belo Horizonte, MG. Anais... Belo Horizonte: SBPC: UFMG, 1997. v. 2, p. 3-4.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 12. | | ARAUJO, A. C. de; SÁ, T. D. de A.; FRAZÃO, R. R.; SOMMER, R. Aplicação de técnicas de estatística descritiva à análise da precipitação sob dossel em vegetação secundária jovem no nordeste do Pará. In: SEMINÁRIO DE INICIAÇÃO CIENTIFICA DA FCAP, 7.; SEMINÁRIO DE INICIAÇÃO CIENTIFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 1., 1997, Belém, PA. Resumos. Belém, PA: FCAP, 1997. p. 98.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 14. | | OLIVEIRA, B. C. S. de; ARAUJO, A. C. de; OLIVEIRA, L. R. de; MANZI, A. O. Caracterização da variação diária e sazonal do CO2 atmosférico em cultivo da palma de óleo com híbridos interespecíficos (Elaeis guineensis X Elaeis oleifera) no leste da Amazônia. In: WORKSHOP BRASILEIRO DE MICROMETEOROLOGIA, 9., 2015, Santa Maria, RS. Anais. Santa Maria, RS: UFSM, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 15. | | SÁ, T. D. de A.; MOLLER, M. R. F.; ARAUJO, A. C. de; FREIRE, G. S. Chuva sob dossel em capoeiras associadas a agricultura familiar do nordeste do Pará: súmario dos estudos do projeto SHIFT-Capoeira. In: SEMINÁRIO SOBRE MANEJO DA VEGETAÇÃO SECUNDÁRIA PARA A SUSTENTABILIDADE DA AGRICULTURA FAMILIAR DA EMBRAPA AMAZÔNIA ORIENTAL, 1999, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental: CNPq, 2000. p. 77-79. (Embrapa Amazônia Oriental. Documentos, 69).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 16. | | FREIRE, G. S.; COIMBRA, H. M.; ARAUJO, A. C. de; SÁ, T. D. de A. Caracterização espectral da radiação solar em dias de baixa nebulosidade em duas localidades na Amazônia Oriental. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA (AVALIAÇÃO 1997-1998), 8., 1998, Belém, PA. Resumos. Belém, PA: FCAP-Unidade de Apoio à Pesquisa e Pós-Graduação, 1998. p. 180.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 17. | | SÁ, T. D. de A.; FREIRE, G. S.; COIMBRA, H. M.; ARAUJO, A. C. de. Características espectrais da radiação solar em Igarapé-Açu, PA: variáveis associadas a respostas biológicas. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 11.; REUNIÃO LATINO AMERICANO DE AGROMETEOROLOGIA, 2., 1999, Florianópolis. Programa e resumo de anais. Florianópolis: Sociedade Brasileira de Agrometeorologia, 1999. p. 219. CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | ARAUJO, A. C. de; OLIVEIRA, V. C. de; SÁ, T. D. de A. Composição espectral da radiação disponível em vegetações secundárias espontâneas e enriquecidas no nordeste do Pará. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA CNPq/FCAP/EMBRAPA, 6., 1996, Belém, PA. Resumos. Belém, PA: FCAP, 1996. p. 50, 165.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 84 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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