Title

[ARCHIVE] Black Sea Remote Sensing Reflectances and Attenuation Coefficient at 490nm from Multi Satellite and Sentinel-3 OLCI observations

Alternate title

OCEANCOLOUR_BS_OPTICS_L3_NRT_OBSERVATIONS_009_042

Date (Creation)

2013-03-13

Edition

2.1

Edition date

2013-03-13

Citation identifier

ed25e16b-3291-4663-981b-d5ad60983e0b

Abstract

'''This product has been archived'''

For operationnal and online products, please visit https://marine.copernicus.eu

'''Short description :'''

The Global Ocean Satellite monitoring and marine ecosystem study group (GOS) of the Italian National Research Council (CNR), in Rome, distributes Remote Sensing Reflectances (Rrs), and diffuse attenuation coefficient of light at 490 nm (kd490) for multi-sensor (MODIS-AQUA, NOAA20-VIIRS, NPP-VIIRS, Sentinel3A-OLCI at 300m of resolution) (at 1 km resolution) and Sentinel3A-OLCI observations (at 300m resolution). Exclusively for multi-sensor also the absorption of phytoplankton (aph443), Gelbstoff material (adg443), and the particulate backscattering (bbp443) coefficients at 443 nm are provided. Rrs is defined as the ratio of upwelling radiance and downwelling irradiance at any wavelength (412, 443, 490, 555, and 670 nm for multi-sensor, and 400, 412, 443, 490, 510, 560, 620, 665, 674, 681 and 709 nm for OLCI) and can also be expressed as the ratio of normalized water leaving Radiance (nLw) and the extra-terrestrial solar irradiance (F0). Kd490 is defined as the diffuse attenuation coefficient of light at 490 nm, and is a measure of the turbidity of the water column. It is related to the presence of scattering particles via the ratio between Rrs at 490 and 555 nm (490 and 560 nm for OLCI). The current day data temporal consistency is evaluated as Quality Index (QI):

QI=(CurrentDataPixel-ClimatologyDataPixel)/STDDataPixel

where QI is the difference between current data and the relevant climatological field as a signed multiple of climatological standard deviations (STDDataPixel).

Inherent Optical Properties (aph443, adg443 and bbp443 at 443nm) are derived via QAAv6 model.

'''Processing information:'''

Multi-sensor products are constituted by MODIS-AQUA, NOAA20-VIIRS, NPP-VIIRS and Sentinel3A-OLCI. For consistency with NASA L2 dataset, BRDF correction was applied to Sentinel3A-OLCI prior to band shifting and multi sensor merging. Hence, the single sensor OLCI data set is also distributed after BRDF correction. Single sensor NASA Level-2 data are destriped and then all Level-2 data are remapped at 1 km spatial resolution (300m for OLCI) using cylindrical equirectangular projection. Afterwards, single sensor Rrs fields are band-shifted, over the SeaWiFS native bands (using the QAAv6 model, Lee et al., 2002) and merged with a technique aimed at smoothing the differences among different sensors. This technique is developed by The Global Ocean Satellite monitoring and marine ecosystem study group (GOS) of the Italian National Research Council (CNR, Rome). Then geophysical fields (i.e. chlorophyll, kd490, bbp, aph and adg) are estimated via state-of-the-art algorithms for better product quality.

'''Description of observation methods/instruments:'''

Ocean colour technique exploits the emerging electromagnetic radiation from the sea surface in different wavelengths. The spectral variability of this signal defines the so-called ocean colour which is affected by the presence of phytoplankton.

'''Quality / Accuracy / Calibration information:'''

A detailed description of the calibration and validation activities performed over this product can be found on the CMEMS web portal.

'''Suitability, Expected type of users / uses:'''

This product is meant for use for educational purposes and for the managing of the marine safety, marine resources, marine and coastal environment and for climate and seasonal studies.

'''Dataset names :'''

*dataset-oc-bs-opt-multi-l3-rrs412_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-rrs443_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-rrs490_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-rrs510_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-rrs555_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-rrs670_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-kd490_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-bbp443_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-adg443_1km_daily-rt-v02

*dataset-oc-bs-opt-multi-l3-aph443_1km_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs400_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs412_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs443_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs490_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs510_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs560_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs620_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs665_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs674_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs681_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-rrs709_300m_daily-rt-v02

*dataset-oc-bs-opt-olci-l3-kd490_300m_daily-rt-v02

'''Files format:'''

*CF-1.4

*INSPIRE compliant

'''DOI (product) :'''

https://doi.org/10.48670/moi-00092

Credit

E.U. Copernicus Marine Service Information

Point of contact

Organisation name	Individual name	Electronic mail address	Role
OC-CNR-ROMA-IT	Gianluca VOLPE	gianluca.volpe@cnr.it	Product manager
OC-CNR-ROMA-IT	Rosalia SANTOLERI	rosalia.santoleri@cnr.it	Production center
OC-CNR-ROMA-IT	Emanuele BÖHM	gsdk@isac.cnr.it	Local service desk
OC-CNR-ROMA-IT	Simone COLELLA	simone.colella@cnr.it	Production Unit
OC-CNR-ROMA-IT	Javier CONCHA	gsdk@isac.cnr.it	Dissemination Unit

Maintenance and update frequency

Daily

Other

/

Maintenance note

20:00

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features

Discipline

• satellite-observation

Climate and Forecast Standard Names

• surface_ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radiative_flux_in_air
• volume_backwards_scattering_coefficient_of_radiative_flux_in_sea_water_due_to_particles
• volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter_and_non_algal_particles
• volume_attenuation_coefficient_of_downwelling_radiative_flux_in_sea_water
• volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_phytoplankton
• sensormask

Temporal scale

• near-real-time

Area of benefit

• weather-climate-and-seasonal-forecasting
• marine-resources
• coastal-marine-environment
• marine-safety

Reference Geographical Areas

• black-sea

Processing level

• Level 3

Model assimilation

• Not Applicable

Use limitation

See Copernicus Marine Environment Monitoring Service Data commitments and licence at: http://marine.copernicus.eu/web/27-service-commitments-and-licence.php

Access constraints

Other restrictions

Use constraints

License

Other legal constraints

No limitations on public access

Aggregate Datasetindentifier

7bdc830b-6321-4ffb-ae76-8707256c6d03

Association Type

Cross reference

Initiative Type

Document

Aggregate Datasetindentifier

e0f8a482-d960-4c72-8976-8c63873ea4de

Association Type

Cross reference

Initiative Type

Document

Language

eng

Topic category

• Oceans

Description

bounding box

N

S

E

W

Begin date

2016-04-25

Supplemental Information

display priority: 11815

Reference system identifier

EPSG / WGS 84 / Plate Carree (EPSG:32662)

Number of dimensions

2

Dimension name

Row

Resolution

0.3  km

Dimension name

Column

Resolution

0.3  km

Cell geometry

Area

Transformation parameter availability

Distribution format

Name	Version
NetCDF-4	Classic model

Hierarchy level

Series

Statement

The myOcean products depends on other products for production or validation. The detailed list of dependencies is given in ISO19115's aggregationInfo (ISO19139 Xpath = "gmd:MD_Metadata/gmd:identificationInfo/gmd:aggregationInfo[./gmd:MD_AggregateInformation/gmd:initiativeType/gmd:DS_InitiativeTypeCode/@codeListValue='upstream-validation' or 'upstream-production']")

Attribute description

observation

Content type

Physical measurement

Descriptor

temporal resolution: daily mean

Descriptor

vertical level number: 1

Included with dataset

Feature types

Grid

Metadata

File identifier

ed25e16b-3291-4663-981b-d5ad60983e0b

Metadata language

English

Character set

UTF8

Hierarchy level

Series

Hierarchy level name

Copernicus Marine Service product specification

Date stamp

2022-06-28T14:37:00.264Z

Metadata standard name

ISO 19139, MyOcean profile

Metadata standard version

0.2

Metadata author

Organisation name	Individual name	Electronic mail address	Role
CMEMS		servicedesk.cmems@mercator-ocean.eu	Local service desk