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Product DescriptionOverviewTable 1: Overview of SMOS Product
Filenaming conventionnameNetCDF files are named as: SMOS_Icethickness_v3.23_north_<date>.nc File FormatDaily mean SMOS sea ice thickness is given in NetCDF v3 v4 format. Global attributes are given in Table 2. The variables are given as grid arrays , see, therefore as listed in Table 3. Table 2: Global attributes from an example NetCDF file.
description
summary keywords product_version processing_mode time_of_creation history Conventions | geospatial_lat_minspatial_resolution
2018-10-28T00:00:00Z time_coverage_end 2018-10-28T23:59:00Z time_coverage_duration P1D time_coverage_resolution P1D platform SMOS project CS2SMOS PDS: SMOS & CryoSat-2 Sea Ice Data Product Processing and Dissemination Service institution Alfred-Wegener-Institut Helmholtz Zentrum für Polar und Meeresforschung (AWI), http://www.awi.de creator_name Alfred-Wegener-Institut Helmholtz Zentrum für Polar und Meeresforschung (AWI), http://www.awi.de creator_type institution creator_url publisher_email references _CoordSysBuilder ucar.nc2.dataset.conv.CF1Convention Table 3: NetCDF file content. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Variable | Description | Unit | Type | Dimension |
vertical_min | 0.0 |
references | 1) Kaleschke, L., X. Tian-Kunze, N. Maass, M. Maekynen, 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. (2) Tian-Kunze, X., Kaleschke, L., Maass, N., Maekynen, M., Serra, N., Drusch, M., and Krumpen, T., SMOS-derived sea ice thickness: algorithm baseline, product specifications and initial verification, The Cryosphere, 8, 997-1018, doi:10.5194/tc-8-997-2014, 2014 (3) Kaleschke, L., Tian-Kunze, X., Maass, N., Beitsch, A., Wernecke, A., Miernecki, M. and others, SMOS sea ice product: operational application and validation in the Barents Sea marginal ice zone, Remote Sensing of Environment 180 (2016), 264-273. doi: 10.1016/j.rse.2016.03.009 (4) Tietsche, S., Alonso-Balmaseda, M., Rosnay, P., Zuo, H., Tian-Kunze, X., and Kaleschke, L.: Thin Arctic sea ice in L-band observations and an ocean reanalysis, The Cryosphere, 12, 2051-2072, https://doi.org/10.5194/tc-12-2051-2018, 2018. |
Table 3: NetCDF file content.
Variable | Description | Unit | Type | Dimension |
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latitude | latitude coordinate | degrees_north | float32 | 896 x 608 |
longitude | longitude coordinate | degrees_east | float32 | 896 x 608 |
x | Projection_x_corordinate | km | float32 | 608 |
y | Projection_y_corordinate | km | float32 | 896 |
sea_ice_thickness | SMOS sea ice thickness | m | float32 | 1 x 896 x 608 |
ice_thickness_uncertainty | sea ice thickness total uncertainty | m | float32 | 1 x 896 x 608 |
saturation_ratio | ratio of retrieved ice thickness and maximal retrievable ice thickness | % | int16 | 1 x 896 x 608 |
TB | brightness temperature intensity (TBh+TBv)/2 | K | float32 | 1 x 896 x 608 |
TB_uncertainty | brightness temperature uncertainty defined as one standard deviation of TB devided by the sqrt(nPair) | K | float32 | 1 x 896 x 608 |
Tsurf | SMOS derived snow surface temperature | K | float32 | 1 x 896 x 608 |
Sice | Bulk ice salinity | psu | float32 | 1 x 896 x 608 |
nPair | number of TBh and TBv pairs available | int16 | 1 x 896 x 608 | |
RFI_ratio | percent of RFI-contaminated measurements in total measurements | % | float32 | 1 x 896 x 608 |
land | land_binary_mask | int8 | 896 x 608 | |
time | hours since 2010-01-01 00:00:00 | hour | double | 1 |
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GridTable 4: Northern Hemisphere Grid Coordinates of NSIDC Polar Stereographic Grids (ref.: https://nsidc.org/data/polar-stereo/ps_grids.html)
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LinksRead-_me-_first technical Technical note ESA Websites: ESA EO Mission CryoSatESA EO Mission SMOSVisualization of NetCDF data: |
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ContactLars Kaleschke |