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 …
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.
Variable
Description
Unit
Type
Dimension
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