Carbon exchange in a Caatinga area during an unusually drought year.
Autor(a) principal: | |
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Data de Publicação: | 2017 |
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/1075024 |
Resumo: | The objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere. |
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Carbon exchange in a Caatinga area during an unusually drought year.SemiáridoDry forestTurbulent vortices covarianceSecaDióxido de carbonoFlorestaResistência a SecaCarbon dioxideThe objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere.LUCIANA SANDRA BASTOS DE SOUZA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE; MAGNA SOELMA BESERRA DE MOURA, CPATSA; GILBERTO CHOHAKU SEDIYAMA, UFV; THIERES GEORGE FREIRE DA SILVA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE.SOUZA, L. S. B. deMOURA, M. S. B. deSEDIYAMA, G. C.SILVA, T. G. F. da2018-02-28T00:52:07Z2018-02-28T00:52:07Z2017-09-0520172018-02-28T00:52:07Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleAgrometeoros, Passo Fundo, v. 25, n. 1, p. 37-45, ago. 2017.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1075024enginfo: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:EMBRAPA2018-02-28T00:52:16Zoai:www.alice.cnptia.embrapa.br:doc/1075024Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542018-02-28T00:52:16falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542018-02-28T00:52:16Repositório 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 |
Carbon exchange in a Caatinga area during an unusually drought year. |
title |
Carbon exchange in a Caatinga area during an unusually drought year. |
spellingShingle |
Carbon exchange in a Caatinga area during an unusually drought year. SOUZA, L. S. B. de Semiárido Dry forest Turbulent vortices covariance Seca Dióxido de carbono Floresta Resistência a Seca Carbon dioxide |
title_short |
Carbon exchange in a Caatinga area during an unusually drought year. |
title_full |
Carbon exchange in a Caatinga area during an unusually drought year. |
title_fullStr |
Carbon exchange in a Caatinga area during an unusually drought year. |
title_full_unstemmed |
Carbon exchange in a Caatinga area during an unusually drought year. |
title_sort |
Carbon exchange in a Caatinga area during an unusually drought year. |
author |
SOUZA, L. S. B. de |
author_facet |
SOUZA, L. S. B. de MOURA, M. S. B. de SEDIYAMA, G. C. SILVA, T. G. F. da |
author_role |
author |
author2 |
MOURA, M. S. B. de SEDIYAMA, G. C. SILVA, T. G. F. da |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
LUCIANA SANDRA BASTOS DE SOUZA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE; MAGNA SOELMA BESERRA DE MOURA, CPATSA; GILBERTO CHOHAKU SEDIYAMA, UFV; THIERES GEORGE FREIRE DA SILVA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE. |
dc.contributor.author.fl_str_mv |
SOUZA, L. S. B. de MOURA, M. S. B. de SEDIYAMA, G. C. SILVA, T. G. F. da |
dc.subject.por.fl_str_mv |
Semiárido Dry forest Turbulent vortices covariance Seca Dióxido de carbono Floresta Resistência a Seca Carbon dioxide |
topic |
Semiárido Dry forest Turbulent vortices covariance Seca Dióxido de carbono Floresta Resistência a Seca Carbon dioxide |
description |
The objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-09-05 2017 2018-02-28T00:52:07Z 2018-02-28T00:52:07Z 2018-02-28T00:52:07Z |
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 |
Agrometeoros, Passo Fundo, v. 25, n. 1, p. 37-45, ago. 2017. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1075024 |
identifier_str_mv |
Agrometeoros, Passo Fundo, v. 25, n. 1, p. 37-45, ago. 2017. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1075024 |
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 |
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1794503450398031872 |