BGS Hosted Metadata
Global ocean atlas of phytoplankton phenology indices from SeaWiFS ocean-colour time-series during the decade 1998-2007.
GreenSeas was an EU FP7 programme funded to advance the quantitative knowledge of how planktonic marine ecosystems, including phytoplankton, bacterioplankton and zooplankton, will respond to environmental and climate changes. To achieve this GreenSeas employed a combination of observation data, numerical simulations and a cross-disciplinary synthesis to develop a high quality, harmonized and standardized plankton and plankton ecology long time-series, data inventory and information service. This contribution to the programme developed a number of indices to characterize quantitatively the seasonality of phytoplankton (Platt and Sathyendranath, 2008, Racault et al., 2014a). Specifically, indices that relate to the study of timing of periodic biological events as influenced by the environment are referred to as phytoplankton phenology. These indices include: timings of initiation, peak, and termination as well as the duration of the phytoplankton growing period. Changes in phytoplankton phenology (triggered by variations in climate) can profoundly alter: (1) the efficiency of the biological pump, with inevitable impact of the global carbon cycle; and (2) the interactions across trophic levels, which can engender trophic mismatch with major impacts on the survival of commercially important fish and crustacean larvae. Phenology indices were estimated using the R2010.0 reprocessing of Level 3 Mapped chlorophyll-a concentration from the Sea-viewing Wide Field-of-view (SeaWiFS) sensor. The chlorophyll-a data were retrieved from NASA Ocean Color Web http://oceancolor.gsfc.nasa.gov for the period 1997-2008 at 9 km spatial resolution and 8-day temporal resolution. Linear interpolation was applied to map the chlorophyll-a concentration onto a 1degreex1degree fixed grid. The phenology indices were estimated following the method described in Racault et al. (2012). Missing chlorophyll-a data were reduced from the time-series prior to estimating the timing of ecological events. Missing values were filled by interpolating spatially adjacent values (average of 3 × 3 pixels on the 9km grid), when these were available. Any remaining missing values were filled by interpolating temporally adjacent values (average of previous and following 8-day composites), when these were available. Otherwise the value was not filled. A 3-week running mean was applied to remove small peaks in chlorophyll-a. The timings of initiation and end of the phytoplankton growing period were detected as the weeks when the chlorophyll concentration in a particular year rose above the long-term median value plus 5% and later fell below this same threshold (Racault et al., 2012). The duration of the growing season is defined as the number of weeks between initiation and end.
Simple
- Alternate title
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British Oceanographic Data Centre record 1048GREENSEAS_PHENOLOGY
- Date (Publication)
- 2017-10-03
- Date (Creation)
- 2014-08-20
- Date (Revision)
- 2015-06-30
- Citation identifier
- http://www.bodc.ac.uk/ / EDMED6106
- Point of contact
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Organisation name Individual name Electronic mail address Role Plymouth Marine Laboratory
Unknown
Owner Plymouth Marine Laboratory
Unknown
Originator British Oceanographic Data Centre
Custodian British Oceanographic Data Centre
Distributor
- Maintenance and update frequency
- As needed
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MEDIN metadata record availability
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Vertical Coverages
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INSPIRE themes
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SeaDataNet PDV
- Access constraints
- Other restrictions
- Other constraints
- No limitations apply
- Other constraints
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Data are freely available
- Use constraints
- Other restrictions
- Other constraints
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No conditions apply
- Spatial representation type
- Text, table
- Language
- English
- Topic category
-
- Biota
)
- Geographic identifier
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World
SeaVoX water bodies 2021-10-28 revision
- Begin date
- 1998-01-01
- End date
- 2007-12-31
- Unique resource identifier
- urn:ogc:def:crs:EPSG::4326
- Codespace
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OGP
- Distribution format
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Name Version Network Common Data Form
- OnLine resource
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Protocol Linkage Name https://www.bodc.ac.uk/data/published_data_library/catalogue/10.5285/005c027f-2d88-087c-e053-6c86abc04e4c/ Published dataset - doi:10.5285/005c027f-2d88-087c-e053-6c86abc04e4c
- Hierarchy level
- Dataset
Conformance result
- Title
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COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Explanation
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BODC protocols are based on the Open Archival Information System (OAIS) model enabling BODC to iterate towards compliance with the on-going evolution and development of community requirements including FAIR (Findable,Accessible,Interoperable,Reusable), TRUST (Transparency, Responsibility, User community, Sustainability, Technology) and CARE (Collective Benefit, Authority to Control, Responsibility, Ethics). Data managers quality assure submissions and assemble the metadata necessary for curation. Submissions (as received) are placed in a long-term accession and stored in triplicate across multiple sites. Appropriate data are transferred into a standard internal format with source variable names mapped to controlled vocabularies, documentation assembled, and metadata loaded into BODC databases. Access to these data is through direct request, the BODC website and through partner repositories such as SeaDataNet. Access control is attained by assigning a data policy to each set of data and this policy is used to administer access when data are requested. Discovery metadata is aligned with EU INSPIRE (through MEDIN) and SeaDataNet community standards. Data are converted to open community formats including Ocean Data View ASCII and SeaDataNet NetCDF, with data described using terms from the NERC vocabulary server. BODC submission agreements are documented on the BODC website and customer service is assured with a dedicated requests team that serve data following local regulations including General Data Protection Regulation (GDPR) 2018 and Environmental Information Regulations (EIR) 2004.
- Pass
- Yes
- Statement
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This dataset was created by the organisations with the "originator" role in this metadata record following their in-house data processing and quality control procedures. The data were then provided to the British Oceanographic Data Centre (BODC) for publishing and attribution of a DOI. The authors provide full information about data collection, data processing and data quality to enable users to assess data suitability themselves.
Instrument(s) used to collect data: ocean colour radiometers.
Metadata
- File identifier
- 0cfd9251dd3358899d65dbc00e5a3b3e XML
- Metadata language
- English
- Hierarchy level
- Dataset
- Date stamp
- 2021-12-20T06:31:16
- Metadata standard name
- MEDIN
- Metadata standard version
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3.1.1
- Metadata author
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Organisation name Individual name Electronic mail address Role British Oceanographic Data Centre
Polly Hadžiabdić
Point of contact
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