this field can be used in combination with \"ice_conc\" to access un-bounded normal distribution of sea ice concentration estimates corresponding to the uncertainty estimate in \"total_standard_error\". It does also feature some amount of un-physical data (below 0 and above 1).
units
%
grid_mapping
Lambert_Azimuthal_Grid
coordinates
lat lon
long_name
sea ice concentration estimates as retrieved by the algorithm, and that were edited away by the various filters
status flag bit array for sea ice concentration retrievals
standard_name
sea_ice_area_fraction status_flag
valid_min
1
valid_max
32767
grid_mapping
Lambert_Azimuthal_Grid
flag_masks
1, 2, 4, 8, 16, 32, 64, 128
flag_meanings
land lake open_water_filtered land_spill_over high_t2m coast max_ice_climo not_accepted
flag_descriptions
all bits to 0 (no flag/flag 0): Nominal retrieval by the SIC algorithm bit 1 (flag 1): Position is over land bit 2 (flag 2): Position is lake bit 3 (flag 4): SIC is set to zero by the open water filter bit 4 (flag 8): SIC value is changed for correcting land spill-over effects bit 5 (flag 16): Handle with caution, the 2m air temperature is high at this position, and this might be false ice bit 6 (flag 32): Coast bit 7 (flag 64): SIC is set to zero since position is outside maximum sea ice climatology bit 8 (flag 128): Point not accepted but no other flags raised.
comment
Flag values found in the map might be combinations of those listed above. For example flag value 80 (= 2^4 + 2^6 = 16 + 64) indicates high_t2m AND temporal_interp
This dataset provides Sea Ice Concentration (SIC) for the polar regions, derived from the Nimbus-5 Electrical Scanning Microwave Radiometer (ESMR), which operated between 1972 and 1977. It is processed with an algorithm using the single channel ESMR data (19.35 GHz), and has been gridded at 25 km grid spacing. This is the first version of the product, v1.0. This product was generated in the context of the ESA Climate Change Initiative Programme (ESA CCI) by the Sea Ice CCI (Sea_Ice_cci) project.
