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Version
Date
Description of Changes
1.0
02/12/2015
Initial version
1.1
01/06/2016
- New background field estimate
- New correlation length scale estimate
- Applying OSI SAF ice type product to exclude SMOS data over multiyear ice
1.2
23/11/2016
- Added CS2/SMOS weighted mean field in netcdf files
- Added attributes in netcdf files
- Switch to netcdf version 4
1.3
05/06/2017
- This algorithm version refers to Ricker et al. (2017)
- SMOS background now uses one week behind and one week ahead of the target week
- Switching from SMOS product version 3.0 to 3.1 Documentation changes
1.4
01/09/2018
- To be added …
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Data AccessDaily 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. |
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We updated the CS2SMOS processing to the latest input versions of the source data (SMOS L3C sea ice thickness v3.3 & CryoSat-2 L2P sea ice thickness v2.6) CryoSat-2 version 2.6 update
CS2SMOS algorithm changes
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We updated the CS2SMOS processing to the latest input versions of the source data (SMOS L3C sea ice thickness v3.3 & CryoSat-2 L2P sea ice thickness v2.5) CryoSat-2 version 2.5 update
CS2SMOS algorithm changes
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We updated the CS2SMOS processing to the latest input versions of the source data (SMOS L3C sea ice thickness v3.3 & CryoSat-2 L2P sea ice thickness v2.4) CryoSat-2 version 2.4 update
SMOS version 3.3 update
CS2SMOS file format changes
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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.
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Product Description Overview
File naming conventionNetCDF files are named using the following convention: <convention-prefix>_<regional code>- <institution>,<platform(s)>,<grid>_<time>_<mode>_<product version>_<file version>.nc
Example NetCDF naming for operationally processed data: W_XX-ESA,SMOS_CS2,NH_25KM_EASE2_20190304_20190310_o_v204_01_l4sit.nc Example NetCDF naming for reprocessed data: W_XX-ESA,SMOS_CS2,NH_25KM_EASE2_20190304_20190310_r_v204_01_l4sit.nc File FormatThe weekly |
Description of NetCDF data files
The weekly analysisgrids are given in standardized binary data format (Network common data form: NetCDF v4). Global attributes are given in Table 1. The variables are given as grid arrays, see |
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2. NetCDF files are formatted according to CF conventions: CF-1.6 ACDD-1.3. We use a scaling factor of 10^-3 and a fillvalue = -2147483647. |
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Figure 1: Specifications of the EASE2 25 km grid, which is used for the merged product.
Table 1: Global attributes from an example NetCDF file, covering the week from March 04 to March 10, 2019.
Table 2: NetCDF file content. Note, that we use a scaling factor of 10^-3 and a fillvalue = -2147483647. |
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Grid
All grids are projected onto the 25 km EASE2 Grid, which is based on a polar aspect spherical Lambert azimuthal equal-area projection (Brodzik et al., 2012). The grid dimension is 5400 km x 5400 km, equal to a 432 x 432 grid. The grid is centered on the geographic Pole, meaning that the Pole is located at the intersection of center cells (Figure 1).
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Figure1: Specifications of the EASE2 25 km grid, which is used for the merged product.
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LinksESA Websites: Visualization of NetCDF data: |
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Points of ContactsResponsible Scientists |