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Dataset Overview | National Centers for Environmental Information (NCEI)

Global NOAA CoastWatch Chlorophyll Frontal Product from MODIS/Aqua from 2015-08-01 to 2022-10-31 (NCEI Accession 0110333)

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This collection includes MODIS/Aqua chlorophyll frontal data products. The NOAA Okeanos operational production system produces near real-time chlorophyll frontal products (magnitude and direction), using data from MODIS/Aqua L2 chlorophyll products that are generated in the Okeanos system using the NASA L2gen ocean color algorithm. The chlorophyll frontal products are calculated using the BOASNRA algorithm, a concatenation of the Belkin-O'Reilly Algorithm (BOA) for front detection (Belkin and O'Reilly, 2009), and the Stripe Noise Reduction Algorithm (SNRA) (Belkin et al, 2013). The BOASNRA code is included in the CoastWatch ocean color products processing software that was written by the NOAA CoastWatch team. Maps of oceanic chlorophyll fronts can be directly used in marine fisheries, marine conservation, environment protection, and other applications and operations.
  • Cite as: OSPO Ocean Color Team (2020). Global NOAA CoastWatch Chlorophyll Frontal Product from MODIS/Aqua from 2015-08-01 to 2022-10-31 (NCEI Accession 0110333). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0110333. Accessed [date].
gov.noaa.nodc:0110333
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Distribution Formats
  • PNG (Version: 1.2)
  • HDF (Version: 2013)
    • File Specification: NOAA CoastWatch HDF. CW HDF file will have satellite fields with the following information: Lat, Lon, Frontal magnitude, Frontal direction, Flags (rejected pixels). File-naming convention = DataSource_PYYYYJJJ_hhmm_XXZZ_closest_DataProduct.nc, where: - DataSource: MODSCW - DataProduct: chlgradmag, which indicates that processing was used to calculate the gradient of the OC Chlorophyll data. - YYYYJJJ: Starting and ending 4-digit year and 3-digit day of year for 8-day composite - hhmm: four digit starting time (hour + minutes) of granule - XX: Region information: GM for Gulf of Mexico, AK for Alaska, CB for Caribbean, NE for Northeast US, SE for Southeast US, and WC for West coast US. - ZZ: Projection option, 05 is projection of Mercator. - closest: Designates a particular non-default way of performing geoprojection
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2015-08-01 to 2022-10-31
Spatial Bounding Box Coordinates
West: -180
East: -60
South: 8
North: 64
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2020-04-23
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Purpose An analysis of horizontal gradients in satellite ocean color data from the MODIS/Aqua data stream provides information on frontal boundaries important to marine ecosystems. This information can be used by marine scientists to better manage marine resources. For example, the interannual variability in the strength and location of ocean fronts affects a number of key living marine resources, such as Northern Shrimp, Atlantic herring and marine mammals.
Use Limitations
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: OSPO Ocean Color Team (2020). Global NOAA CoastWatch Chlorophyll Frontal Product from MODIS/Aqua from 2015-08-01 to 2022-10-31 (NCEI Accession 0110333). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0110333. Accessed [date].
Cited Authors
Contributors
Resource Providers
Publishers
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
  • satelliteObservation
Global Change Master Directory (GCMD) Science Keywords
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Project keywords NODC PROJECT NAMES THESAURUS
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: OSPO Ocean Color Team (2020). Global NOAA CoastWatch Chlorophyll Frontal Product from MODIS/Aqua from 2015-08-01 to 2022-10-31 (NCEI Accession 0110333). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0110333. Accessed [date].
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processing Steps
  • 2020-04-23T20:39:20Z - NCEI Accession 0110333 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processor
  • NOAA/NESDIS/OSPO/Satellite Products Branch
Source Datasets
  • MODIS/Aqua L1B files
    • Description of Source: MODIS/Aqua L1B files are received as individual 5-minute granules and processed to MODL2 which is further used to process chlorophyll frontal products using the Belkin-O’Reilly algorithm in the CoastWatch Okeanos automated processing system.
    • Temporal extent used: 2012-10 to present
Acquisition Information (collection)
Instrument
  • MODIS
Platform
  • Aqua
Last Modified: 2024-01-29T12:50:17Z
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