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Dataset

 

ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): High(er) Resolution Sea Ice Concentration Climate Data Record Version 3 (SSM/I and SSMIS)

Update Frequency: Not Planned
Latest Data Update: 2023-05-04
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-05-11
DOI Publication Date: 2023-05-17
Download Stats: last 12 months
Dataset Size: 21.81K Files | 78GB
Abstract

This climate data record of sea ice concentration (SIC) is obtained using passive microwave satellite data from the Special Sensor Microwave Imager (SSM/I) and the Special Sensor Microwave Imager Sounder (SSMIS) over the polar regions (Arctic and Antarctic). The processing chain features: 1) dynamic tuning of tie-points and algorithms, 2) correction of atmospheric noise using a Radiative Transfer Model, 3) computation of per-pixel uncertainties, 4) an optimal hybrid sea ice concentration algorithm, and 5) pan-sharpening of the SIC fields using the near-90 GHz imagery channels. This dataset was generated by the ESA Climate Change Initiative (CCI+) Sea Ice Phase 1 project. This dataset is an enhanced-resolution version of the EUMETSAT Ocean and Sea Ice Satellite Application Facility Global Sea Ice Concentration Climate Data Record (OSI SAF OSI-450-a CDR) over the period 1991-2020.

Citable as:  Lavergne, T.; Sørensen, A.; Tonboe, R.T.; Kreiner, M.; Saldo, R.; Birkedal, A.; Baordo, F.; Aspenes, T.; Eastwood, S. (2023): ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): High(er) Resolution Sea Ice Concentration Climate Data Record Version 3 (SSM/I and SSMIS). NERC EDS Centre for Environmental Data Analysis, 17 May 2023. doi:10.5285/eade27004395466aaa006135e1b2ad1a. https://dx.doi.org/10.5285/eade27004395466aaa006135e1b2ad1a
Abbreviation: SICCI-HR-SIC
Keywords: Sea Ice, ESA, CCI, Arctic, Antarctic

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: http://licences.ceda.ac.uk/image/data_access_condition/esacci_seaice_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:

This dataset is an enhanced-resolution version of the EUMETSAT Ocean and Sea Ice Satellite Application Facility Global Sea Ice Concentration Climate Data Record (OSI SAF OSI-450-a CDR) over the period 1991-2020. It uses satellite data from US satellite missions SSM/I and SSMIS prepared by the EUMETSAT Climate Monitoring SAF and ECMWF/C3S ERA5 data.
File Format:
The data are in NetCDF format.

Related Documents

 ESA CCI Sea Ice project website
 ESA Climate Change Initiative website
 Product Validation and Intercomparison Report (PVIR) - High(er) Resolution Sea Ice Concentration
 Algorithm Theoretical Basis Document (ATBD) - High(er) Resolution Sea Ice Concentration
 Product User Guide (PUG) - High(er) Resolution Sea Ice Concentration

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title CCI+ Phase 1 SIC: N90LIN and pan-sharpening
Abstract The CCI+ Phase 1 Sea Ice Concentration (SIC) production has two streams: N90LIN, and pan-sharpening. The N90LIN step prepares SICs relying mostly on the near-90 GHz channels (higher resolution, higher noise). The pan-sharpening step prepares SICs using the results of both the OSI SAF “19/37 GHz” algorithm (SICCI3LF) and N90LIN (higher resolution, higher noise). The result of the pan-sharpening step (named “resolution enhanced” SICCI3LF, reSICCI3LF) is a main SIC outcome from CCI+ Phase 1, while N90LIN is more seen as a by-product for expert users (because of the increased noise).
Input Description None
Output Description None
Software Reference None
Output Description

None
  • var_id: Lambert_Azimuthal_Grid
  • units: %
  • long_name: algorithm uncertainty (one standard deviation) of concentration of sea ice
  • var_id: algorithm_standard_uncertainty
  • units: %
  • standard_name: sea_ice_area_fraction
  • var_id: ice_conc
  • long_name: fully filtered concentration of sea ice using atmospheric correction of brightness temperatures and open water filters
  • units: %
  • long_name: sea ice concentration estimates as retrieved by the algorithm, and that were edited away by the various filters
  • var_id: raw_ice_conc_values
  • units: %
  • long_name: smearing uncertainty (one standard deviation) of concentration of sea ice
  • var_id: smearing_standard_uncertainty
  • standard_name: sea_ice_area_fraction status_flag
  • var_id: status_flag
  • long_name: status flag bit array for sea ice concentration retrievals
  • var_id: time_bnds
  • units: %
  • standard_name: sea_ice_area_fraction standard_error
  • long_name: total uncertainty (one standard deviation) of concentration of sea ice
  • var_id: total_standard_uncertainty
  • units: km
  • standard_name: projection_x_coordinate
  • long_name: x coordinate of projection (eastings)
  • var_id: xc
  • units: km
  • standard_name: projection_y_coordinate
  • long_name: y coordinate of projection (northings)
  • var_id: yc

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: lat
  • long_name: latitude coordinate
  • units: degrees_east
  • standard_name: longitude
  • var_id: lon
  • long_name: longitude coordinate
  • standard_name: time
  • var_id: time
  • units: seconds
  • long_name: reference time of product
Coverage
Temporal Range
Start time:
1991-01-07T00:00:00
End time:
2020-12-31T23:59:59
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (9)
Publishers (1)
Principal Investigators (1)