| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m21d.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34T/47LCRFP | |||
| Repository | sid.inpe.br/mtc-m21d/2022/09.19.15.17 | |||
| Metadata Repository | sid.inpe.br/mtc-m21d/2022/09.19.15.17.04 | |||
| Metadata Last Update | 2023:01.03.16.46.16 (UTC) administrator | |||
| Secondary Key | INPE--PRE/ | |||
| Citation Key | SantosValéKamp:2022:SaWaWe | |||
| Title | Sargassum warnings in the Western Equatorial Atlantic using ocean colour remote sensing  | |||
| Year | 2022 | |||
| Access Date | 2024, May 28 | |||
| Secondary Type | PRE CI | |||
| 2. Context | ||||
| Author | 1 Santos, João Felipe Cardoso dos 2 Valério, Aline de Matos 3 Kampel, Milton | |||
| Resume Identifier | 1 2 3 8JMKD3MGP5W/3C9JHTG | |||
| Group | 1 SER-SRE-DIPGR-INPE-MCTI-GOV-BR 2 DIOTG-CGCT-INPE-MCTI-GOV-BR 3 DIOTG-CGCT-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) | |||
| Author e-Mail Address | 1 joaofelipecsantos@gmail.com 2 alinedmv@gmail.com 3 mkampel2010@gmail.com | |||
| Conference Name | Congreso Latinoamericano de Ciencias del Mar, 19 | |||
| Conference Location | Panamá | |||
| Date | 19-23 Sept. 2022 | |||
| History (UTC) | 2022-09-19 15:17:04 :: simone -> administrator :: 2023-01-03 16:46:16 :: administrator -> simone :: 2022 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Abstract | Antecedentes 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. | |||
| Area | SRE | |||
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > SER > Sargassum warnings in... | |||
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGCT > Sargassum warnings in... | |||
| doc Directory Content | there are no files | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| User Group | simone | |||
| Visibility | shown | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3F3NU5S 8JMKD3MGPCW/46KUATE | |||
| Host Collection | urlib.net/www/2021/06.04.03.40 | |||
| 6. Notes | ||||
| Empty Fields | archivingpolicy 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 | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||