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Tipo da ReferênciaJournal Article
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/43FN7KL
Repositóriosid.inpe.br/mtc-m21c/2020/10.26.17.00
Última Atualização2020:10.26.17.00.27 simone
Metadadossid.inpe.br/mtc-m21c/2020/10.26.17.00.27
Última Atualização dos Metadados2020:10.27.12.40.20 administrator
DOI10.3390/rs12193264
ISSN2072-4292
Chave de CitaçãoBontempoDalaPonzVale:2020:AdSiAi
TítuloAdjustments to sif aid the interpretation of drought responses at the caatinga of Northeast Brazil
Ano2020
MêsOct
Data de Acesso28 nov. 2020
Número de Arquivos1
Tamanho15948 KiB
Área de contextualização
Autor1 Bontempo, Edgard
2 Dalagnol da Silva, Ricardo
3 Ponzoni, Flávio Jorge
4 Valeriano, Dalton de Morisson
Identificador de Curriculo1
2
3 8JMKD3MGP5W/3C9JH4G
4 8JMKD3MGP5W/3C9JGT4
ORCID1 0000-0002-4004-9605
2 0000-0002-7151-8697
Grupo1 DIDSR-CGOBT-INPE-MCTIC-GOV-BR
2 DIDSR-CGOBT-INPE-MCTIC-GOV-BR
3 DIDSR-CGOBT-INPE-MCTIC-GOV-BR
4 DIDSR-CGOBT-INPE-MCTIC-GOV-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
4 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor1 edgardbontempo@gmail.com
2 ricardo.silva@inpe.br
3 fjponzoni@gmail.com
4 dalton.valeriano@inpe.br
RevistaRemote Sensing
Volume12
Nota SecundáriaB3_GEOGRAFIA B3_ENGENHARIAS_I B4_GEOCIÊNCIAS B4_CIÊNCIAS_AMBIENTAIS B5_CIÊNCIAS_AGRÁRIAS_I
Histórico2020-10-26 17:00:27 :: simone -> administrator ::
2020-10-26 17:00:28 :: administrator -> simone :: 2020
2020-10-26 17:01:30 :: simone -> administrator :: 2020
2020-10-27 12:40:20 :: administrator -> simone :: 2020
Área de conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Documentoconcluido
Estágio do Documentonot transferred
Transferível1
Tipo do ConteudoExternal Contribution
Tipo SecundárioPRE PI
Tipo de Versãopublisher
Número19
Páginas1-29
Palavras-Chavechlorophyll fluorescence, SIF, drought, spectral vegetation indices, Caatinga, GOME-2, abiotic stress.
ResumoSun-Induced chlorophyll Fluorescence (SIF) relates directly to photosynthesis yield and stress but there are still uncertainties in its interpretation. Most of these uncertainties concern the influences of the emitting vegetations structure (e.g., leaf angles, leaf clumping) and biochemistry (e.g., chlorophyll content, other pigments) on the radiative transfer of fluorescent photons. The Caatinga is a large region in northeast Brazil of semiarid climate and heterogeneous vegetation, where such biochemical and structural characteristics can vary greatly even within a single hectare. With this study we aimed to characterize eleven years of SIF seasonal variation from Caatinga vegetation (2007 to 2017) and to study its responses to a major drought in 2012. Orbital SIF data from the instrument GOME-2 was used along with MODIS MAIAC EVI and NDVI. Environmental data included precipitation rate (TRMM), surface temperature (MODIS) and soil moisture (ESA CCI). To support the interpretation of SIF responses we used red and far-red SIF adjusted by the Suns zenith angle (SIF-SZA) and by daily Photosynthetically Active Radiation (dSIF). Furthermore, we also adjusted SIF through two contrasting formulations using NDVI data as proxy for structure and biochemistry, based on previous leaf-level and landscape level studies: SIF-Yield and SIF-Prod. Data was tested with time-series decomposition, rank correlation, spatial correlation and Linear Mixed Models (LMM). Results show that GOME-2 SIF and adjusted SIF formulations responded consistently to the observed environmental variation and showed a marked decrease in SIF emissions in response to a 2012 drought that was generally larger than the corresponding NDVI and EVI decreases. Drought sensitivity of SIF, as inferred from LMM slopes, was correlated to land cover at different regions of the Caatinga. This is the first study to show correlation between landscape-level SIF and an emergent property of ecosystems (i.e., resilience), showcasing the value of remotely sensed fluorescence for ecological studies.
AreaSRE
Tipo de Trabalhojournal article
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Arquivo Alvobontempo2020.pdf
e-Mail (login)simone
Grupo de Usuáriossimone
Grupo de Leitoresadministrator
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Visibilidadeshown
Política de Arquivamentoallowpublisher allowfinaldraft
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Repositório Espelhourlib.net/www/2017/11.22.19.04.03
Unidades Imediatamente Superiores8JMKD3MGPCW/3ER446E
DivulgaçãoWEBSCI; PORTALCAPES; MGA; COMPENDEX; SCOPUS.
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
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