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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
20/08/2021 |
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Data da última atualização: |
20/08/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALTHOFF, D.; BAZAME, H. C.; FILGUEIRAS, R.; RODRIGUES, L. N. |
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Afiliação: |
DANIEL ALTHOFF; HELIZANI COUTO BAZAME; ROBERTO FILGUEIRAS; LINEU NEIVA RODRIGUES, CPAC. |
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Título: |
Assessing rainfall spatial variability in the Brazilian savanna region with TMPA rainfall dataset. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of South American Earth Sciences, v. 111, 2021. |
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Páginas: |
8 p. |
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DOI: |
https://doi.org/10.1016/j.jsames.2021.103482 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT Rainfall is a major component of the hydrological cycle. The lack of basic information on rainfall spatial variability is a major source of uncertainty in many fields of studies, e.g., meteorology, hydrology, and agriculture. Satellite rainfall measurements are becoming increasingly popular for their extensive database and reliable estimates. The objective of this study was to use the Tropical Rainfall Measuring Mission (TRMM) dataset along with rain gauges to characterize aspects of rainfall spatial variability and discuss the possible impacts from recent trends in the Brazilian savannah biome (Cerrado). Gauge stations were used to assess TRMM bias error and calibrate data for further analyses. Rainfall rates and their spatial variability showed a strong relationship to the transition zones between different biomes. Rainfall showed a decreasing trend for the eastern region of the Cerrado biome, a region characterized by a recent and significant expansion of crop areas. These trends agree with results from different studies which highlight the current drawdown of groundwater levels and reduced discharge, and possible lengthening of the dry season in the long run. As many conflicts have already been documented for this region, these decreasing trends are alarming for urgent and consistent hydroclimatic monitoring, and improved water resources planning and management. Positive trends for rainfall in the central Cerrado are likely a momentary recovery of recent-period drought. MenosABSTRACT Rainfall is a major component of the hydrological cycle. The lack of basic information on rainfall spatial variability is a major source of uncertainty in many fields of studies, e.g., meteorology, hydrology, and agriculture. Satellite rainfall measurements are becoming increasingly popular for their extensive database and reliable estimates. The objective of this study was to use the Tropical Rainfall Measuring Mission (TRMM) dataset along with rain gauges to characterize aspects of rainfall spatial variability and discuss the possible impacts from recent trends in the Brazilian savannah biome (Cerrado). Gauge stations were used to assess TRMM bias error and calibrate data for further analyses. Rainfall rates and their spatial variability showed a strong relationship to the transition zones between different biomes. Rainfall showed a decreasing trend for the eastern region of the Cerrado biome, a region characterized by a recent and significant expansion of crop areas. These trends agree with results from different studies which highlight the current drawdown of groundwater levels and reduced discharge, and possible lengthening of the dry season in the long run. As many conflicts have already been documented for this region, these decreasing trends are alarming for urgent and consistent hydroclimatic monitoring, and improved water resources planning and management. Positive trends for rainfall in the central Cerrado are likely a momentary recovery of recent-period ... Mostrar Tudo |
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Palavras-Chave: |
Meteorologia de satélite; Precipitação. |
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Thesagro: |
Cerrado; Mudança Climática. |
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Categoria do assunto: |
-- |
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Marc: |
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024 7 $ahttps://doi.org/10.1016/j.jsames.2021.103482$2DOI
100 1 $aALTHOFF, D.
245 $aAssessing rainfall spatial variability in the Brazilian savanna region with TMPA rainfall dataset.$h[electronic resource]
260 $c2021
300 $a8 p.
520 $aABSTRACT Rainfall is a major component of the hydrological cycle. The lack of basic information on rainfall spatial variability is a major source of uncertainty in many fields of studies, e.g., meteorology, hydrology, and agriculture. Satellite rainfall measurements are becoming increasingly popular for their extensive database and reliable estimates. The objective of this study was to use the Tropical Rainfall Measuring Mission (TRMM) dataset along with rain gauges to characterize aspects of rainfall spatial variability and discuss the possible impacts from recent trends in the Brazilian savannah biome (Cerrado). Gauge stations were used to assess TRMM bias error and calibrate data for further analyses. Rainfall rates and their spatial variability showed a strong relationship to the transition zones between different biomes. Rainfall showed a decreasing trend for the eastern region of the Cerrado biome, a region characterized by a recent and significant expansion of crop areas. These trends agree with results from different studies which highlight the current drawdown of groundwater levels and reduced discharge, and possible lengthening of the dry season in the long run. As many conflicts have already been documented for this region, these decreasing trends are alarming for urgent and consistent hydroclimatic monitoring, and improved water resources planning and management. Positive trends for rainfall in the central Cerrado are likely a momentary recovery of recent-period drought.
650 $aCerrado
650 $aMudança Climática
653 $aMeteorologia de satélite
653 $aPrecipitação
700 1 $aBAZAME, H. C.
700 1 $aFILGUEIRAS, R.
700 1 $aRODRIGUES, L. N.
773 $tJournal of South American Earth Sciences$gv. 111, 2021.
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Embrapa Cerrados (CPAC) |
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| 13. |  | RODRIGUES, L. N. Impacto das pequenas barragens. In: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007. Publicado no Jornal Estado de Minas em 23 abr. 2007.| Tipo: Artigo de Divulgação na Mídia |
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