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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
31/05/2016 |
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Data da última atualização: |
19/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NÖLSCHER, A. C.; YAÑEZ-SERRANO, A. M.; WOLFF, S.; ARAUJO, A. C. de; LAVRIC, J. V.; KESSELMEIER, J.; WILLIAMS, J. |
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Afiliação: |
A. C. Nölscher, Max Planck Institute for Chemistry; A. M. Yañez-Serrano, Max Planck Institute for Chemistry / INPA; S. Wolff, Max Planck Institute for Chemistry / INPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU; J. V. Lavric, Max Planck Institute for Biogeochemistry; J. Kesselmeier, Max Planck Institute for Chemistry; J. Williams, Max Planck Institute for Chemistry. |
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Título: |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Nature Communications, v. 7, art. n. 10383, 22 Jan. 2016. |
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DOI: |
10.1038/ncomms10383 |
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Idioma: |
Inglês |
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Conteúdo: |
The hydroxyl radical (OH) removes most atmospheric pollutants from air. The loss frequency of OH radicals due to the combined effect of all gas-phase OH reactive species is a measureable quantity termed total OH reactivity. Here we present total OH reactivity observations in pristine Amazon rainforest air, as a function of season, time-of-day and height (0?80 m). Total OH reactivity is low during wet (10 s1) and high during dry season (62 s1). Comparison to individually measured trace gases reveals strong variation in unaccounted for OH reactivity, from 5 to 15% missing in wet-season afternoons to mostly unknown (average 79%) during dry season. During dry-season afternoons isoprene, considered the dominant reagent with OH in rainforests, only accounts for B20% of the total OH reactivity. Vertical profiles of OH reactivity are shaped by biogenic emissions, photochemistry and turbulent mixing. The rainforest floor was identified as a significant but poorly characterized source of OH reactivity. |
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Palavras-Chave: |
Sazonalidade. |
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Thesagro: |
Floresta. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143562/1/ncomms10383.pdf
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Marc: |
LEADER 01709naa a2200241 a 4500
001 2045925
005 2022-05-19
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1038/ncomms10383$2DOI
100 1 $aNÖLSCHER, A. C.
245 $aUnexpected seasonality in quantity and composition of Amazon rainforest air reactivity.$h[electronic resource]
260 $c2016
520 $aThe hydroxyl radical (OH) removes most atmospheric pollutants from air. The loss frequency of OH radicals due to the combined effect of all gas-phase OH reactive species is a measureable quantity termed total OH reactivity. Here we present total OH reactivity observations in pristine Amazon rainforest air, as a function of season, time-of-day and height (0?80 m). Total OH reactivity is low during wet (10 s1) and high during dry season (62 s1). Comparison to individually measured trace gases reveals strong variation in unaccounted for OH reactivity, from 5 to 15% missing in wet-season afternoons to mostly unknown (average 79%) during dry season. During dry-season afternoons isoprene, considered the dominant reagent with OH in rainforests, only accounts for B20% of the total OH reactivity. Vertical profiles of OH reactivity are shaped by biogenic emissions, photochemistry and turbulent mixing. The rainforest floor was identified as a significant but poorly characterized source of OH reactivity.
650 $aAmazonia
650 $aFloresta
653 $aSazonalidade
700 1 $aYAÑEZ-SERRANO, A. M.
700 1 $aWOLFF, S.
700 1 $aARAUJO, A. C. de
700 1 $aLAVRIC, J. V.
700 1 $aKESSELMEIER, J.
700 1 $aWILLIAMS, J.
773 $tNature Communications$gv. 7, art. n. 10383, 22 Jan. 2016.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
17/02/2005 |
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Data da última atualização: |
30/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALVARENGA, R. C.; COSTA, L. M. da. |
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Afiliação: |
RAMON COSTA ALVARENGA, CNPMS; UFV. |
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Título: |
Preparo do solo e manejo de restos culturais. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Informe Agropecuário, Belo Horizonte, v. 13, n. 152, p. 10-14, 1988. |
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Idioma: |
Português |
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Thesagro: |
Solo. |
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Thesaurus NAL: |
Soil. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/65802/1/Preparo-solo-3.pdf
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Marc: |
LEADER 00421naa a2200145 a 4500
001 1488622
005 2018-05-30
008 1988 bl uuuu u00u1 u #d
100 1 $aALVARENGA, R. C.
245 $aPreparo do solo e manejo de restos culturais.$h[electronic resource]
260 $c1988
650 $aSoil
650 $aSolo
700 1 $aCOSTA, L. M. da
773 $tInforme Agropecuário, Belo Horizonte$gv. 13, n. 152, p. 10-14, 1988.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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