Dataset: ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): Northern hemisphere sea ice thickness from the Envisat satellite on a monthly grid (L3C), v2.0#
Dataset identifier: esacci.SEAICE.mon.L3C.SITHICK.RA-2.Envisat.NH25KMEASE2.2-0.r1
Data store: cciodp
How to open this dataset in AVL JupyterLab
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.SEAICE.mon.L3C.SITHICK.RA-2.Envisat.NH25KMEASE2.2-0.r1')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.SEAICE.mon.L3C.SITHICK.RA-2.Envisat.NH25KMEASE2.2-0.r1')
Map tiles and data from OpenStreetMap, under the ODbL.
Basic information#
| Parameter | Value |
|---|---|
| Bounding box longitude (°) | -180.0 to 180.0 |
| Bounding box latitude (°) | 16.0 to 90.0 |
| Time range | 2002-09-30 to 2012-03-31 |
| Time period | 1M |
Click here for full dataset metadata.
Variable list#
Click on a variable name to jump to the variable’s full metadata.
| Variable | Long name | Units |
|---|---|---|
| freeboard | elevation of retracked point above instantaneous sea surface height (with snow range corrections) | m |
| freeboard_uncertainty | freeboard uncertainty | m |
| radar_freeboard | elevation of retracked point above instantaneous sea surface height (no snow range corrections) | m |
| radar_freeboard_uncertainty | uncertainty of radar freeboard | m |
| sea_ice_concentration | sea ice contration | percent |
| sea_ice_thickness | thickness of the sea ice layer | m |
| sea_ice_thickness_uncertainty | uncertainty of the sea ice layer thickness | m |
| status_flag | status flag for the sea ice thickness retrieval | [none] |
| Lambert_Azimuthal_Grid | [none] | [none] |
Full variable metadata#
freeboard#
| Field | Value |
|---|---|
| coordinates | time lon lat |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | elevation of retracked point above instantaneous sea surface height (with snow range corrections) |
| standard_name | sea_ice_freeboard |
| units | m |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
freeboard_uncertainty#
| Field | Value |
|---|---|
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | freeboard uncertainty |
| coordinates | time lon lat |
| units | m |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
radar_freeboard#
| Field | Value |
|---|---|
| long_name | elevation of retracked point above instantaneous sea surface height (no snow range corrections) |
| grid_mapping | Lambert_Azimuthal_Grid |
| units | m |
| coordinates | time lon lat |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
radar_freeboard_uncertainty#
| Field | Value |
|---|---|
| units | m |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | uncertainty of radar freeboard |
| coordinates | time lon lat |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
sea_ice_concentration#
| Field | Value |
|---|---|
| comment | Average grid cell sea ice concentration during days with altimetry data coverage (not monthly mean) |
| coordinates | time lon lat |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | sea ice contration |
| standard_name | sea_ice_area_fraction |
| units | percent |
| valid_max | 100.0 |
| valid_min | 0.0 |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
sea_ice_thickness#
| Field | Value |
|---|---|
| standard_name | sea_ice_thickness |
| units | m |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | thickness of the sea ice layer |
| coordinates | time lon lat |
| ancillary_variables | sea_ice_thickness_uncertainty status_flag |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
sea_ice_thickness_uncertainty#
| Field | Value |
|---|---|
| long_name | uncertainty of the sea ice layer thickness |
| coordinates | time lon lat |
| grid_mapping | Lambert_Azimuthal_Grid |
| units | m |
| orig_data_type | float32 |
| fill_value | None |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | float32 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
status_flag#
| Field | Value |
|---|---|
| _Unsigned | false |
| comment | Describes the status of the sea-ice thickness retrieval |
| coordinates | time lat lon |
| flag_meaning | 0: nominal sea ice thickness retrieval; 1: no input data; 2: outside sea ice concentration mask; 3: latitude above orbit inclination; 4: land, lake or land ice; 5: sea ice thickness retrieval failed; |
| flag_values | 0, 1, 2, 3, 4, 5 |
| grid_mapping | Lambert_Azimuthal_Grid |
| long_name | status flag for the sea ice thickness retrieval |
| standard_name | sea_ice_thickness status_flag |
| unit | 1 |
| valid_max | 5 |
| valid_min | 0 |
| orig_data_type | uint8 |
| fill_value | 65535 |
| size | 12877056 |
| shape | 69, 432, 432 |
| chunk_sizes | 1, 432, 432 |
| file_chunk_sizes | 1, 432, 432 |
| data_type | uint16 |
| dimensions | time, yc, xc |
| file_dimensions | time, yc, xc |
Lambert_Azimuthal_Grid#
| Field | Value |
|---|---|
| _Unsigned | false |
| false_easting | 0.0 |
| false_northing | 0.0 |
| grid_mapping_name | lambert_azimuthal_equal_area |
| inverse_flattening | 298.257223563 |
| latitude_of_projection_origin | 90.0 |
| longitude_of_projection_origin | 0.0 |
| proj4_string | +proj=laea +lon_0=0 +datum=WGS84 +ellps=WGS84 +lat_0=90.0 |
| semi_major_axis | 6378137.0 |
| orig_data_type | uint8 |
| fill_value | 65535 |
| size | 1 |
| shape | 1 |
| chunk_sizes | 1 |
| file_chunk_sizes | 1 |
| data_type | uint16 |
| dimensions | |
| file_dimensions |
Full dataset metadata#
| Field | Value |
|---|---|
| title | ESA Sea Ice Climate Change Initiative (Sea_Ice_cci): Northern hemisphere sea ice thickness from the Envisat satellite on a monthly grid (L3C), v2.0 |
| source | Altimetry: envisat, Snow depth: Warren Climatology with 50% reduction for first-year sea ice, Mean Sea Surface: DTU15 global mean sea surface, Sea ice Concentration: OSI-SAF Global Sea Ice Concentration (OSI-409), Sea ice type: ESA-SICCI multiyear ice area fraction from daily gridded NSIDC SSMI-SSMIS brightness temperatures version 4 using the NASA-Team algorithm |
| history | 20180417T093645Z (created) |
| references | Algorithm Theoretical Baseline Document, Sea Ice Climate Change Initiative: Phase 2 (version 2.2) |
| product_version | 2-0 |
| processing_level | L3C |
| comment | Northern hemisphere sea ice thickness coverage is limited to the winter month between October and April due to negative effect of surface melt on the retrieval of freeboard. Please consult the Product User Guide (PUG) for more information. |
| project | Climate Change Initiative - European Space Agency |
| ecv | SEAICE |
| institute | Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung |
| product_string | NH25KMEASE2 |
| data_type | SITHICK |
| sensor_id | RA-2 |
| platform_id | Envisat |
| abstract | This dataset provides a Climate Data Record of Sea Ice Thickness for the northern hemisphere polar region, derived from the RA-2 (Radar Altimeter -2) instrument on the ENVISAT satellite at Level 3C (L3C). 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. It provides monthly gridded sea ice thickness data on a Lambeth Azimuthal Equal Area grid for the period October 2002 to March 2012. Data is only available for the NH winter months, October - April. |
| publication_date | 2018-05-25T11:06:05 |
| uuid | f4c34f4f0f1d4d0da06d771f6972f180 |
| catalog_url | https://catalogue.ceda.ac.uk/uuid/f4c34f4f0f1d4d0da06d771f6972f180 |
| cci_project | SEAICE |