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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrossilvipastoril. Para informações adicionais entre em contato com cpamt.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrossilvipastoril. |
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Data corrente: |
21/08/2023 |
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Data da última atualização: |
22/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANDERSON, M. C.; ZOLIN, C. A.; HAIN, C. R.; SEMMENS, K.; YILMAZ, M. T.; GAO, F. |
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Afiliação: |
MARTHA CAROL ANDERSON, UNITED STATE DEPARTAMENT OF AGRICULTURE; CORNELIO ALBERTO ZOLIN, CPAMT; CHRISTOPHER R. HAIN, UNIVESITY OF MARYLAND; KATHRYN SEMMENS, NATURE NURTURE CENTER; MUSTAFA TUĞRUL YILMAZ, MIDDLE EAST THECNICAL UNIVERSITY; FENG GAO, UNITED STATE DEPARTAMENT OF AGRICULTURE. |
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Título: |
Comparison of satellite-derived LAI and precipitation anomalies over Brazil with a thermal infrared-based Evaporative Stress Index for 2003?2013. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Journal of Hydrology, v. 526, p. 287-302, 2015. |
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ISSN: |
0022-1694 |
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DOI: |
https://doi.org/10.1016/j.jhydrol.2015.01.005 |
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Idioma: |
Português |
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Conteúdo: |
Abstract: Shortwave vegetation index (VI) and leaf area index (LAI) remote sensing products yield inconsistent depictions of biophysical response to drought and pluvial events that have occurred in Brazil over the past decade. Conflicting reports of severity of drought impacts on vegetation health and functioning have been attributed to cloud and aerosol contamination of shortwave reflectance composites, particularly over the rainforested regions of the Amazon basin which are subject to prolonged periods of cloud cover and episodes of intense biomass burning. This study compares timeseries of satellite-derived maps of LAI from the Moderate Resolution Imaging Spectroradiometer (MODIS) and precipitation from the Tropical Rainfall Mapping Mission (TRMM) with a diagnostic Evaporative Stress Index (ESI) retrieved using thermal infrared remote sensing over South America for the period 2003?2013. This period includes several severe droughts and floods that occurred both over the Amazon and over unforested savanna and agricultural areas in Brazil. Cross-correlations between absolute values and standardized anomalies in monthly LAI and precipitation composites as well as the actual-to-reference evapotranspiration (ET) ratio used in the ESI were computed for representative forested and agricultural regions. The correlation analyses reveal strong apparent anticorrelation between MODIS LAI and TRMM precipitation anomalies over the Amazon, but better coupling over regions vegetated with shorter grass and crop canopies. The ESI was more consistently correlated with precipitation patterns over both landcover types. Temporal comparisons between ESI and TRMM anomalies suggest longer moisture buffering timescales in the deeper rooted rainforest systems. Diagnostic thermal-based retrievals of ET and ET anomalies, such as used in the ESI, provide independent information on the impacts of extreme hydrologic events on vegetation health in comparison with VI and precipitation-based drought indicators, and used in concert may provide a more reliable evaluation of natural and managed ecosystem response to variable climate regimes. MenosAbstract: Shortwave vegetation index (VI) and leaf area index (LAI) remote sensing products yield inconsistent depictions of biophysical response to drought and pluvial events that have occurred in Brazil over the past decade. Conflicting reports of severity of drought impacts on vegetation health and functioning have been attributed to cloud and aerosol contamination of shortwave reflectance composites, particularly over the rainforested regions of the Amazon basin which are subject to prolonged periods of cloud cover and episodes of intense biomass burning. This study compares timeseries of satellite-derived maps of LAI from the Moderate Resolution Imaging Spectroradiometer (MODIS) and precipitation from the Tropical Rainfall Mapping Mission (TRMM) with a diagnostic Evaporative Stress Index (ESI) retrieved using thermal infrared remote sensing over South America for the period 2003?2013. This period includes several severe droughts and floods that occurred both over the Amazon and over unforested savanna and agricultural areas in Brazil. Cross-correlations between absolute values and standardized anomalies in monthly LAI and precipitation composites as well as the actual-to-reference evapotranspiration (ET) ratio used in the ESI were computed for representative forested and agricultural regions. The correlation analyses reveal strong apparent anticorrelation between MODIS LAI and TRMM precipitation anomalies over the Amazon, but better coupling over regions vegetated with ... Mostrar Tudo |
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Thesagro: |
Evapotranspiração; Sensoriamento Remoto. |
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Thesaurus Nal: |
Amazonia; Climatology; Drought; Evapotranspiration; Remote sensing. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03032naa a2200289 a 4500
001 2156027
005 2023-08-22
008 2015 bl uuuu u00u1 u #d
022 $a0022-1694
024 7 $ahttps://doi.org/10.1016/j.jhydrol.2015.01.005$2DOI
100 1 $aANDERSON, M. C.
245 $aComparison of satellite-derived LAI and precipitation anomalies over Brazil with a thermal infrared-based Evaporative Stress Index for 2003?2013.$h[electronic resource]
260 $c2015
520 $aAbstract: Shortwave vegetation index (VI) and leaf area index (LAI) remote sensing products yield inconsistent depictions of biophysical response to drought and pluvial events that have occurred in Brazil over the past decade. Conflicting reports of severity of drought impacts on vegetation health and functioning have been attributed to cloud and aerosol contamination of shortwave reflectance composites, particularly over the rainforested regions of the Amazon basin which are subject to prolonged periods of cloud cover and episodes of intense biomass burning. This study compares timeseries of satellite-derived maps of LAI from the Moderate Resolution Imaging Spectroradiometer (MODIS) and precipitation from the Tropical Rainfall Mapping Mission (TRMM) with a diagnostic Evaporative Stress Index (ESI) retrieved using thermal infrared remote sensing over South America for the period 2003?2013. This period includes several severe droughts and floods that occurred both over the Amazon and over unforested savanna and agricultural areas in Brazil. Cross-correlations between absolute values and standardized anomalies in monthly LAI and precipitation composites as well as the actual-to-reference evapotranspiration (ET) ratio used in the ESI were computed for representative forested and agricultural regions. The correlation analyses reveal strong apparent anticorrelation between MODIS LAI and TRMM precipitation anomalies over the Amazon, but better coupling over regions vegetated with shorter grass and crop canopies. The ESI was more consistently correlated with precipitation patterns over both landcover types. Temporal comparisons between ESI and TRMM anomalies suggest longer moisture buffering timescales in the deeper rooted rainforest systems. Diagnostic thermal-based retrievals of ET and ET anomalies, such as used in the ESI, provide independent information on the impacts of extreme hydrologic events on vegetation health in comparison with VI and precipitation-based drought indicators, and used in concert may provide a more reliable evaluation of natural and managed ecosystem response to variable climate regimes.
650 $aAmazonia
650 $aClimatology
650 $aDrought
650 $aEvapotranspiration
650 $aRemote sensing
650 $aEvapotranspiração
650 $aSensoriamento Remoto
700 1 $aZOLIN, C. A.
700 1 $aHAIN, C. R.
700 1 $aSEMMENS, K.
700 1 $aYILMAZ, M. T.
700 1 $aGAO, F.
773 $tJournal of Hydrology$gv. 526, p. 287-302, 2015.
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Embrapa Agrossilvipastoril (CPAMT) |
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| 2. |  | ANDERSON, M. C.; ZOLIN, C. A.; SENTELHAS, P. C.; HAIN, C. R.; SEMMENS, K.; YILMAZ, M. T.; FENG GAO; OTKIN, J. A.; TETRAULT, R. The Evaporative Stress Index as an indicator of agricultural drought in Brazil: An assessment based on crop yield impacts. Remote Sensing of Environment, v. 174, p. 82-99, mar. 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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