|
|
Registros recuperados : 164 | |
Registros recuperados : 164 | |
|
|
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
31/05/2016 |
Data da última atualização: |
19/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
NÖLSCHER, A. C.; YAÑEZ-SERRANO, A. M.; WOLFF, S.; ARAUJO, A. C. de; LAVRIC, J. V.; KESSELMEIER, J.; WILLIAMS, J. |
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. |
Título: |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Nature Communications, v. 7, art. n. 10383, 22 Jan. 2016. |
DOI: |
10.1038/ncomms10383 |
Idioma: |
Inglês |
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. |
Palavras-Chave: |
Sazonalidade. |
Thesagro: |
Floresta. |
Thesaurus NAL: |
Amazonia. |
Categoria do assunto: |
W Química e Física |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143562/1/ncomms10383.pdf
|
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.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|