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Dataset

 
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ESA Sea State Climate Change Initiative (Sea_State_cci) : Global remote sensing daily merged multi-mission along-track significant wave height, L3 product, version 1.1

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2020-01-30
DOI Publication Date: 2020-01-30
Download Stats: last 12 months

Abstract

The ESA Sea State Climate Change Initiative (CCI) project has produced global daily merged multi-sensor time-series of along-track satellite altimeter significant wave height data (referred to as Level 3 (L3) data) with a particular focus for use in climate studies.

This dataset contains the Version 1.1 edited Remote Sensing Significant Wave Height product, along-track at approximately 6 km spatial resolution, which have been generated from upstream Sea State CCI L2P products, edited and merged into daily products, retaining only valid and good quality measurements from all altimeters over one day, with simplified content (only a few key parameters). This is close to what is delivered in Near-Real Time by the CMEMS (Copernicus - Marine Environment Monitoring Service) project.

This first version of Sea State CCI products is inherited from the GlobWave project building on experience and existing outputs. It extends and improves the GlobWave products which were a post-processing over existing L2 altimeter agency products with additional filtering, corrections and variables. A major improvement consists in a new denoised sea surface height variable using Empirical Mode Decomposition.

The altimeter data used in the Sea State CCI dataset v1.1 come from multiple satellite missions spanning from 1991 to 2018 (ERS-1, ERS-2, Topex, Envisat, GFO, CryoSat-2, Jason-1, Jason-2, Jason-3, SARAL). Many altimeters are bi-frequency (Ku-C or Ku-S) and only measurements in Ku band were used, for consistency reasons, being available on each altimeter but SARAL (Ka band).

Citable as:  Piollé, J.-F.; Dodet, G.; Quilfen, Y. (2020): ESA Sea State Climate Change Initiative (Sea_State_cci) : Global remote sensing daily merged multi-mission along-track significant wave height, L3 product, version 1.1. Centre for Environmental Data Analysis, 30 January 2020. doi:10.5285/3ef6a5a66e9947d39b356251909dc12b. http://dx.doi.org/10.5285/3ef6a5a66e9947d39b356251909dc12b
Abbreviation: Not defined
Keywords: Sea State, CCI, Significant Wave Height

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
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: https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_sea_state_terms_and_conditions.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data was produced by the ESA Sea State CCI team at Ifremer and was transferred to CEDA as part of the ESA CCI Open Data Portal project.

Data Quality:
This product is a subset of the L2P products whose data were quality checked and compared to in situ reference data. For more details on the validation process, refer to the product user guide.
File Format:
Data are in NetCDF format

Process overview

  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
  • long_name: Ku band adjusted backscatter coefficient
  • units: dB
  • var_id: sigma0_adjusted
  • names: Ku band adjusted backscatter coefficient, surface_backwards_scattering_coefficient_of_radar_wave
  • var_id: swh_adjusted
  • standard_name: sea_surface_wave_significant_height
  • long_name: Ku band adjusted significant wave height
  • units: m
  • names: Ku band adjusted significant wave height, sea_surface_wave_significant_height
  • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
  • units: dB
  • long_name: Ku band backscatter coefficient
  • var_id: sigma0
  • names: surface_backwards_scattering_coefficient_of_radar_wave, Ku band backscatter coefficient
  • var_id: swh_denoised
  • long_name: Ku band denoised significant wave height
  • standard_name: sea_surface_wave_significant_height
  • units: m
  • names: sea_surface_wave_significant_height, Ku band denoised significant wave height
  • long_name: Ku band significant wave height
  • var_id: swh
  • standard_name: sea_surface_wave_significant_height
  • units: m
  • names: sea_surface_wave_significant_height, Ku band significant wave height
  • units: m
  • var_id: swh_uncertainty
  • long_name: best estimate of significant wave height standard error
  • names: best estimate of significant wave height standard error
  • var_id: distance_to_coast
  • long_name: distance to nearest coast
  • units: m
  • names: distance to nearest coast
  • standard_name: sea_floor_depth_below_mean_sea_level
  • long_name: ocean depth
  • var_id: bathymetry
  • units: m
  • names: ocean depth, sea_floor_depth_below_mean_sea_level
  • long_name: relative pass number of satellite associated with measurement
  • var_id: cycle
  • names: relative pass number of satellite associated with measurement
  • long_name: satellite associated with measurement
  • var_id: satellite
  • names: satellite associated with measurement

Co-ordinate Variables

  • standard_name: latitude
  • var_id: lat
  • long_name: latitude
  • units: degrees_north
  • names: latitude
  • var_id: lon
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • names: longitude
  • var_id: time
  • standard_name: time
  • long_name: time of measurement
  • names: time, time of measurement
Coverage
Temporal Range
Start time:
1991-07-31T23:00:00
End time:
2018-12-31T23:59:59
Geographic Extent

 
80.0000°
 
-180.0000°
 
180.0000°
 
-80.0000°