Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil

Detalhes bibliográficos
Autor(a) principal: Gondim,Patrícia S. de S.
Data de Publicação: 2015
Outros Autores: Lima,José R. de S., Antonino,Antonio C. D., Hammecker,Claude, Silva,Renan A. B. da, Gomes,Clarissa A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000100003
Resumo: A micrometeorological experiment was conducted over grasslands in a semi-arid region of north-eastern Brazil (São João, Pernambuco) from January to December 2011, using the Bowen ratio energy balance method, to improve the current understanding of energy partitioning and water vapour exchange over this ecosystem in this region. The objectives of the present study were to quantify the seasonal and diurnal variations in energy and water vapour exchanges over grasslands and understand the biotic and abiotic factors controlling the energy partitioning of this ecosystem. In the dry period, the low stored soil water limited the grass production and leaf area index, and as a consequence of these conditions, most of the annual net radiation (58%) was consumed in sensible heat flux. During the course of the study the evaporative fraction was linearly related to the leaf area index. The total annual evapotranspiration and its daily maximum were 543.8 mm and 3.14 mm d-1. The seasonal and diurnal variations in energy partitioning and evapotranspiration were controlled by soil water availability and leaf area index.
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spelling Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazilevapotranspirationsoil water contentleaf area indexA micrometeorological experiment was conducted over grasslands in a semi-arid region of north-eastern Brazil (São João, Pernambuco) from January to December 2011, using the Bowen ratio energy balance method, to improve the current understanding of energy partitioning and water vapour exchange over this ecosystem in this region. The objectives of the present study were to quantify the seasonal and diurnal variations in energy and water vapour exchanges over grasslands and understand the biotic and abiotic factors controlling the energy partitioning of this ecosystem. In the dry period, the low stored soil water limited the grass production and leaf area index, and as a consequence of these conditions, most of the annual net radiation (58%) was consumed in sensible heat flux. During the course of the study the evaporative fraction was linearly related to the leaf area index. The total annual evapotranspiration and its daily maximum were 543.8 mm and 3.14 mm d-1. The seasonal and diurnal variations in energy partitioning and evapotranspiration were controlled by soil water availability and leaf area index.Departamento de Engenharia Agrícola - UFCG2015-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000100003Revista Brasileira de Engenharia Agrícola e Ambiental v.19 n.1 2015reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v19n1p3-8info:eu-repo/semantics/openAccessGondim,Patrícia S. de S.Lima,José R. de S.Antonino,Antonio C. D.Hammecker,ClaudeSilva,Renan A. B. daGomes,Clarissa A.eng2015-10-09T00:00:00Zoai:scielo:S1415-43662015000100003Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2015-10-09T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
title Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
spellingShingle Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
Gondim,Patrícia S. de S.
evapotranspiration
soil water content
leaf area index
title_short Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
title_full Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
title_fullStr Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
title_full_unstemmed Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
title_sort Environmental control on water vapour and energy exchanges over grasslands in semiarid region of Brazil
author Gondim,Patrícia S. de S.
author_facet Gondim,Patrícia S. de S.
Lima,José R. de S.
Antonino,Antonio C. D.
Hammecker,Claude
Silva,Renan A. B. da
Gomes,Clarissa A.
author_role author
author2 Lima,José R. de S.
Antonino,Antonio C. D.
Hammecker,Claude
Silva,Renan A. B. da
Gomes,Clarissa A.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Gondim,Patrícia S. de S.
Lima,José R. de S.
Antonino,Antonio C. D.
Hammecker,Claude
Silva,Renan A. B. da
Gomes,Clarissa A.
dc.subject.por.fl_str_mv evapotranspiration
soil water content
leaf area index
topic evapotranspiration
soil water content
leaf area index
description A micrometeorological experiment was conducted over grasslands in a semi-arid region of north-eastern Brazil (São João, Pernambuco) from January to December 2011, using the Bowen ratio energy balance method, to improve the current understanding of energy partitioning and water vapour exchange over this ecosystem in this region. The objectives of the present study were to quantify the seasonal and diurnal variations in energy and water vapour exchanges over grasslands and understand the biotic and abiotic factors controlling the energy partitioning of this ecosystem. In the dry period, the low stored soil water limited the grass production and leaf area index, and as a consequence of these conditions, most of the annual net radiation (58%) was consumed in sensible heat flux. During the course of the study the evaporative fraction was linearly related to the leaf area index. The total annual evapotranspiration and its daily maximum were 543.8 mm and 3.14 mm d-1. The seasonal and diurnal variations in energy partitioning and evapotranspiration were controlled by soil water availability and leaf area index.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000100003
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v19n1p3-8
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.19 n.1 2015
reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
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instacron:UFCG
instname_str Universidade Federal de Campina Grande (UFCG)
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reponame_str Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
collection Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
repository.name.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)
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