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1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m21d.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34T/47LCRFP
Repositóriosid.inpe.br/mtc-m21d/2022/09.19.15.17
Repositório de Metadadossid.inpe.br/mtc-m21d/2022/09.19.15.17.04
Última Atualização dos Metadados2023:01.03.16.46.16 (UTC) administrator
Chave SecundáriaINPE--PRE/
Chave de CitaçãoSantosValéKamp:2022:SaWaWe
TítuloSargassum warnings in the Western Equatorial Atlantic using ocean colour remote sensing
Ano2022
Data de Acesso10 maio 2024
Tipo SecundárioPRE CI
2. Contextualização
Autor1 Santos, João Felipe Cardoso dos
2 Valério, Aline de Matos
3 Kampel, Milton
Identificador de Curriculo1
2
3 8JMKD3MGP5W/3C9JHTG
Grupo1 SER-SRE-DIPGR-INPE-MCTI-GOV-BR
2 DIOTG-CGCT-INPE-MCTI-GOV-BR
3 DIOTG-CGCT-INPE-MCTI-GOV-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor1 joaofelipecsantos@gmail.com
2 alinedmv@gmail.com
3 mkampel2010@gmail.com
Nome do EventoCongreso Latinoamericano de Ciencias del Mar, 19
Localização do EventoPanamá
Data19-23 Sept. 2022
Histórico (UTC)2022-09-19 15:17:04 :: simone -> administrator ::
2023-01-03 16:46:16 :: administrator -> simone :: 2022
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
ResumoAntecedentes y justificación: On 2021, the Brazilian Navy shared the coordinates of four Sargassum spots on the Northern Brazilian continental margin supposed to be oil slicks. Planteamiento del problema y objetivos: Monitoring the distribution of Sargassum in the ocean by remote sensing is of great importance to avoid false alarm verification costs1. Materiales y Métodos: Images from the Wide Field Imager (WFI) sensor onboard the CBERS-4A and Amazonia-1 satellites on a temporal window of ±3 days from the alerts were acquired and processed to Rayleigh corrected reflectance2,3, allowing the observation of the Sargassum spots. To distinguish the Sargassum on the sea surface, we combined the visible, near- and short-wave infrared bands to generate false-color images, in addition to the Normalized Difference Vegetation Index (NDVI). Resultados y Discusión: At least one satellite flew over the alert regions and identified Sargassum spots. On June 21st and 24th, Sargassum was identified by both satellites floating ~57 km northwestwards between image acquisitions. The NDVI histogram was analyzed to identify the values corresponding to clear water, cloud and Sargassum endmembers. The NDVI classification showed good performance with a small percentage of false Sargassum mainly due to pixels composed of mixtures of endmembers, solved using a band ratio criterion4. Conclusiones: The combination of CBERS-4A and Amazonia-1 WFI sensors provided a unique monitoring time frequency and spatial resolution (55 and 64m) to deliver fast and robust information about Sargassum spots on the Northern Brazilian continental margin. The false-color composite image had a good contrast between the Sargassum and the clear water while the NDVI proved to be effective in classifying oceanic images.
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Arranjo 1urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > SER > Sargassum warnings in...
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6. Notas
Campos Vaziosarchivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readergroup readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume
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