Dataset
BICEP/NCEO: Monthly global Particulate Organic Carbon (POC), between 1997-2020 at 4 km resolution (produced from the Ocean Colour Climate Change Initiative v4.2 dataset), version 2
Abstract
The BICEP/NCEO: Monthly global Particulate Organic Carbon (POC) v4.2 datasets contain POC concentrations (mg m^-3) with per pixel uncertainties estimates gridded on both geographic and sinusoidal projections at 4 km spatial resolution for the period of 1997 to 2020. The POC products were generated as part of the European Space Agency (ESA) Biological Pump and Carbon Exchange Processes (BICEP) project with support from the National Centre of Earth Observation (NCEO).
The POC concentrations were estimated using an empirical Remote Sensing Reflectance (Rrs) band ratio algorithm by Stramski et al. (2008): 203.2*Rrs(443)/Rrs(555)^-1.034. This algorithm has shown a relatively good performance in the recent global inter-comparison study conducted by Evers-King et al. (2017). Additional variables that were used for the calculation of the POC products are also provided in the datasets, including the Rrs at 443 nm and 555 nm obtained from the ESA Ocean Colour Climate Change Initiative version 4.2 dataset (OC-CCI v4.2)(Sathyendranath et al., 2020). In addition to the papers by Stramski et al. (2008) and Evers-king et al. (2017), for more details on the algorithm and its validation, please see the BICEP Algorithm Theoretical Basis Document (ATBD) and validation report (https://bicep-project.org/Home).
This version of the dataset is an updated version of the previous 'NCEO: Monthly global Particulate Organic Carbon (POC) (produced from the Ocean Colour Climate Change Initiative, Version 4.2 dataset)'.
A related product based on the Ocean Colour Climate Change Initiative v5.0 data is also available (see the link in the related records section).
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence(s): http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were produced by the Plymouth Marine Laboratory and supplied for archiving at the Centre for Environmental Data Analysis (CEDA). The research underpinning the work was supported by the European Space Agency (ESA) Biological Pump and Carbon Export Processes (BICEP) project and the product generation was supported by the National Centre for Earth Observation (NCEO). |
| Data Quality: |
BICEP/NECO: The algorithm used to generate the Particulate Organic Carbon (POC) v4.2 products has been selected based on a previous validation study (Evers-King et al., 2017). The Remote Sensi ng Reflectance (Rrs) of 443 and 555 nm band ratio algorithm by Stramski et al. (2008) has shown a satisfactory levels of performance from several algorithms (please see Evers-King et al., 2017 paper for detail). Additional validation has been performed through the ESA Biological Pump and Carbon Export Processes (BICEP) project using a large collection of in situ POC data matched up with the Ocean Colour Climate Change Initiative version v4.2 (OC-CCI v4.2) (1997-2020). The selected algorithm statistically performed well across different optical water classes, with r^2 of 0.83 and low uncertainties. For more details of this algorithm's performance, please see the BICEP Algorithm Theoretical Basis Document (ATBD) and validation report (https://bicep-project.org/Home).
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| File Format: |
NetCDF
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Related Documents
Process overview
| Title | Computation of the Particular Organic Carbon product produced from the Ocean Colour Climate Change Initiative v4.2 dataset |
| Abstract | Computation of the Particulate Organic Carbon (POC) v4.2 products on geographic and sinusoidal projections at 4 km resolution are based on the empirical remote sensing reflectance (Rrs) band ratio algorithm by Stamski et al. (2008): 203.2*Rrs(443)/Rrs(555)^-1.034. The Rrs at 443 and 555 nm were obtained from the European Space Agency (ESA) Ocean Colour Climate Change Initiative version 4.2 dataset (OC-CCI v4.2) (Sathyendranath et al., 2020). The bias and root-mean-square-difference of log_10 transformed POC data in each pixel were computed by weighting the uncertainties in each CCI optical water class by their membership (Brewin et al., 2017; Jackson et al., 2017). For more details about algorithm and validations, please see BICEP Algorithm Theoretical Basis Document (ATBD) and validation report (https://bicep-project.org/Home). |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- units: mg m^-3
- long_name: Bias of log10 transformed Particulate Organic Carbon
- standard_name: per_pixel_bias_of_log10_particulate_organic_carbon_in_sea_water
- var_id: POC_bias
- names: Bias of log10 transformed Particulate Organic Carbon, per_pixel_bias_of_log10_particulate_organic_carbon_in_sea_water
- long_name: Particulate Organic Carbon
- units: mg m^-3
- var_id: POC
- standard_name: mass_concentration_of_particulate_organic_carbon_in_sea_water
- names: Particulate Organic Carbon, mass_concentration_of_particulate_organic_carbon_in_sea_water
- units: mg m^-3
- long_name: Root-mean-square-difference of log10 transformed Particulate Organic Carbon
- standard_name: per_pixel_root_mean_square_difference_of_log10_particulate_organic_carbon_in_sea_water
- var_id: POC_rmsd
- names: Root-mean-square-difference of log10 transformed Particulate Organic Carbon, per_pixel_root_mean_square_difference_of_log10_particulate_organic_carbon_in_sea_water
- units: sr-1
- long_name: Sea surface reflectance defined as the ratio of water-leaving radiance to surface irradiance at 443 nm.
- var_id: Rrs_443
- standard_name: remote_sensing_reflectance_443nm_in_sea_water
- names: Sea surface reflectance defined as the ratio of water-leaving radiance to surface irradiance at 443 nm., remote_sensing_reflectance_443nm_in_sea_water
- units: sr-1
- long_name: Sea surface reflectance defined as the ratio of water-leaving radiance to surface irradiance at 555 nm.
- var_id: Rrs_555
- standard_name: remote_sensing_reflectance_555nm_in_sea_water
- names: Sea surface reflectance defined as the ratio of water-leaving radiance to surface irradiance at 555 nm., remote_sensing_reflectance_555nm_in_sea_water
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- var_id: lat
- names: latitude
- units: degrees_east
- standard_name: longitude
- var_id: lon
- names: longitude
- standard_name: time
- var_id: time
- names: time
Temporal Range
1997-09-01T00:00:00
2020-03-31T00:00:00
Geographic Extent
90.0000° |
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-180.0000° |
180.0000° |
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-90.0000° |