Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1045925 |
Resumo: | 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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Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity.SazonalidadeFlorestaAmazoniaThe 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.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.NÖLSCHER, A. C.YAÑEZ-SERRANO, A. M.WOLFF, S.ARAUJO, A. C. deLAVRIC, J. V.KESSELMEIER, J.WILLIAMS, J.2016-05-31T11:11:11Z2016-05-31T11:11:11Z2016-05-3120162017-09-28T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleNature Communications, v. 7, art. n. 10383, 22 Jan. 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/104592510.1038/ncomms10383enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T03:44:09Zoai:www.alice.cnptia.embrapa.br:doc/1045925Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:44:09falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:44:09Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
title |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
spellingShingle |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. NÖLSCHER, A. C. Sazonalidade Floresta Amazonia |
title_short |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
title_full |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
title_fullStr |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
title_full_unstemmed |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
title_sort |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
author |
NÖLSCHER, A. C. |
author_facet |
NÖLSCHER, A. C. YAÑEZ-SERRANO, A. M. WOLFF, S. ARAUJO, A. C. de LAVRIC, J. V. KESSELMEIER, J. WILLIAMS, J. |
author_role |
author |
author2 |
YAÑEZ-SERRANO, A. M. WOLFF, S. ARAUJO, A. C. de LAVRIC, J. V. KESSELMEIER, J. WILLIAMS, J. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
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. |
dc.contributor.author.fl_str_mv |
NÖLSCHER, A. C. YAÑEZ-SERRANO, A. M. WOLFF, S. ARAUJO, A. C. de LAVRIC, J. V. KESSELMEIER, J. WILLIAMS, J. |
dc.subject.por.fl_str_mv |
Sazonalidade Floresta Amazonia |
topic |
Sazonalidade Floresta Amazonia |
description |
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. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-05-31T11:11:11Z 2016-05-31T11:11:11Z 2016-05-31 2016 2017-09-28T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Nature Communications, v. 7, art. n. 10383, 22 Jan. 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1045925 10.1038/ncomms10383 |
identifier_str_mv |
Nature Communications, v. 7, art. n. 10383, 22 Jan. 2016. 10.1038/ncomms10383 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1045925 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
_version_ |
1794503421833773056 |