- Created by Unknown User (rricker), last modified on Oct 20, 2018
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Product Version
Version | Date | Description of Changes |
---|---|---|
1.0 | 02/12/2015 | Initial version |
1.1 | 01/06/2016 |
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1.2 | 23/11/2016 |
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1.3 | 05/06/2017 |
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1.4 | 01/09/2018 |
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Data Access
Daily SMOS and weekly merged CryoSat-SMOS sea ice thickness data can be downloaded via FTP through a Web browser, a FTP client (e.g. FileZilla) or command line. The access is anomymous.
Info
How to cite the Data
For the merged CryoSat-SMOS sea ice thickness data, please
cite: Ricker, R.; Hendricks, S.; Kaleschke, L.; Tian-Kunze, X.; King, J. and Haas, C. (2017), A weekly Arctic sea-ice thickness data record from merged CryoSat-2 and SMOS satellite data, The Cryosphere, 11, 1607-1623, doi:10.5194/tc-11-1607-2017.
include the following phrase into the acknowledgment:
The production of the merged CryoSat-SMOS sea ice thickness data was funded by the ESA project SMOS & CryoSat-2 Sea Ice Data Product Processing and Dissemination Service, and data from DATE to DATE were obtained from AWI.
For the SMOS sea ice thickness data, please
cite: Kaleschke, L., X. Tian‐Kunze, N. Maaß, M. Mäkynen, and M. Drusch (2012), Sea ice thickness retrieval from SMOS brightness temperatures during the Arctic freeze‐up period, Geophys. Res. Lett., 39, L05501, doi: 10.1029/2012GL050916.
include the following phrase into the acknowledgment:
The production of the SMOS sea ice thickness data was funded by the ESA project SMOS & CryoSat-2 Sea Ice Data Product Processing and Dissemination Service, and data from DATE to DATE were obtained from AWI.
Description of NetCDF data files
The weekly analysis grids are given in standardized binary data format (Network common data form: NetCDF v4). The variables are given as grid arrays, see therefore Table 1. All grids are projected onto the 25 km EASE2 Grid, which is based on a polar aspect spherical Lambert azimuthal equal-area projection (Figure 1). NetCDF files are formatted according to CF conventions: CF-1.6 ACDD-1.3.
Figure 1: Specifications of the EASE2 25 km grid, which is used for the merged product.
Table 1: NETCDF file content.
Variable | Description | Unit | Type | Dimension |
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Lambert_Azimuthal_Grid | - | - | int | - |
time_bnds | - | seconds since 1978-01-01 00:00:00 | int | 2 |
analysis_ice_thickness | CS2SMOS merged sea ice thickness | m | Int | 1,432,432 |
background_ice_thickness | optimal interpolation background field | m | Int | 1,432,432 |
weighted_mean_ice_thickness | weighted mean of weekly cs2 and smos ice thickness retrievals | m | Int | 1,432,432 |
innovation | difference between background and analysis ice thickness | m | Int | 1,432,432 |
ice_conc | sea ice concentration | % | Int | 1,432,432 |
ice_type | sea ice type | - | Int | 1,432,432 |
correlation_length_scale | correlation length scale of sea ice thickness | m | Int | 1,432,432 |
analysis_thickness_unc | uncertainty of the merged sea ice thickness | m | Int | 1,432,432 |
smos_ice_thickness | weekly averaged SMOS ice thickness | m | Int | 1,432,432 |
cs2_ice_thickness | weekly averaged CryoSat-2 ice thickness | m | Int | 1,432,432 |
time | reference time of product | seconds since 1978-01-01 00:00:00 | Int | 1 |
xc | x coordinate of projection (eastings) | km | Int | 432 |
yc | y coordinate of projection (northings) | km | Int | 432 |
lon | longitude coordinate | degrees_north | Int | 432,432 |
lat | latitude coordinate | degrees_east | int | 432,432 |
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