Dataset: ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Optical ice velocity of the Helheim Glacier between 2017-05-01 and 2017-08-29, generated using Sentinel-2 data, v1.1#
Dataset identifier: esacci.ICESHEETS.unspecified.Unspecified.IV.MSI-(Sentinel-2).multi-platform.UNSPECIFIED.1-1.greenland_s2_50m_seasonal_20170501_20170829_Helheim
Data store: cciodp
How to open this dataset in AVL JupyterLab
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.ICESHEETS.unspecified.Unspecified.IV.MSI-(Sentinel-2).multi-platform.UNSPECIFIED.1-1.greenland_s2_50m_seasonal_20170501_20170829_Helheim')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.ICESHEETS.unspecified.Unspecified.IV.MSI-(Sentinel-2).multi-platform.UNSPECIFIED.1-1.greenland_s2_50m_seasonal_20170501_20170829_Helheim')
Map tiles and data from OpenStreetMap, under the ODbL.
Basic information#
| Parameter | Value |
|---|---|
| Bounding box longitude (°) | -80.0 to -10.0 |
| Bounding box latitude (°) | 60.0 to 90.0 |
| Time range | 2017-04-30 to 2017-08-29 |
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 |
|---|---|---|
| land_ice_surface_northing_velocity | land_ice_surface_northing_velocity | m/day |
| land_ice_surface_easting_velocity | land_ice_surface_easting_velocity | m/day |
Full variable metadata#
crs#
| Field | Value |
|---|---|
| latitude_of_projection_origin | 90.0 |
| epsg | 3413 |
| straight_vertical_longitude_from_pole | -45.0 |
| standard_parallel | 70.0 |
| false_northing | 0.0 |
| grid_mapping_name | polar_stereographic |
| false_easting | 0.0 |
| unit | m |
| spatial_ref | PROJCS[\"WGS 84 / NSIDC Sea Ice Polar Stereographic North\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]],PROJECTION[\"Polar_Stereographic\"],PARAMETER[\"latitude_of_origin\",70],PARAMETER[\"central_meridian\",-45],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"X\",EAST],AXIS[\"Y\",NORTH],AUTHORITY[\"EPSG\",\"3413\"]] |
| GeoTransform | 267650.0 50.0 0.0 -2530550.0 0.0 -50.0 |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 1 |
| shape | 1 |
| chunk_sizes | 1 |
| file_chunk_sizes | 1 |
| data_type | int64 |
| dimensions | |
| file_dimensions |
land_ice_surface_northing_velocity#
| Field | Value |
|---|---|
| long_name | land_ice_surface_northing_velocity |
| description | northing ice velocity |
| standard_name | land_ice_surface_northing_velocity |
| coordinates | time y x |
| grid_mapping | crs |
| units | m/day |
| orig_data_type | float32 |
| fill_value | None |
| size | 5897612 |
| shape | 1, 2428, 2429 |
| chunk_sizes | 1, 2428, 2429 |
| file_chunk_sizes | 1, 2428, 2429 |
| data_type | float32 |
| dimensions | time, y, x |
| file_dimensions | time, y, x |
land_ice_surface_easting_velocity#
| Field | Value |
|---|---|
| units | m/day |
| coordinates | time y x |
| standard_name | land_ice_surface_easting_velocity |
| grid_mapping | crs |
| long_name | land_ice_surface_easting_velocity |
| description | easting ice velocity |
| orig_data_type | float32 |
| fill_value | None |
| size | 5897612 |
| shape | 1, 2428, 2429 |
| chunk_sizes | 1, 2428, 2429 |
| file_chunk_sizes | 1, 2428, 2429 |
| data_type | float32 |
| dimensions | time, y, x |
| file_dimensions | time, y, x |
Full dataset metadata#
| Field | Value |
|---|---|
| product_version | 1-1 |
| project | ESA Greenland Ice Sheet CCI |
| source | Sentinel-2 |
| comment | Pixel offsets tracked using Imcorr. Input files were /snufkin/projects/cci/s2raw/s2raw/24WWU/2017-05-06/Seq00/B02.tiff and /snufkin/projects/cci/s2raw/s2raw/24WWU/2017-05-16/Seq00/B02.tiff. Intrinsic S2 shift (faulty georeferencing) estimated as (x,y) = (0.3208, -0.2838) pixels. Shift was corrected. Pixel offsets converted to m/day using scaling dx_in_meters/dt_in_days = 10.0/10.0 = 1.0. |
| history | 2018-04-27 16:25:58 |
| title | ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Optical ice velocity of the Helheim Glacier between 2017-05-01 and 2017-08-29, generated using Sentinel-2 data, v1.1 |
| ecv | ICESHEETS |
| institute | Science [&] Technology AS |
| processing_level | Unspecified |
| product_string | UNSPECIFIED |
| data_type | IV |
| sensor_id | MSI-(Sentinel-2) |
| abstract | This dataset contains optical ice velocity time series and seasonal product of the Helheim Glacier in Greenland, derived from intensity-tracking of Sentinel-2 data acquired between 2017-05-01 and 2017-08-29. It has been produced as part of the ESA Greenland Ice sheet CCI project. The data are provided on a polar stereographic grid (EPSG 3413:Latitude of true scale 70N, Reference Longitude 45E) with 50m grid spacing. The horizontal velocity is provided in true meters per day, towards EASTING (x) and NORTHING (y) direction of the grid. The data have been produced by S[&]T Norway. |
| publication_date | 2019-01-31T14:38:21 |
| uuid | 1e3fcdc14e2246c69fc54f0e1fe7a6ca |
| catalog_url | https://catalogue.ceda.ac.uk/uuid/1e3fcdc14e2246c69fc54f0e1fe7a6ca |
| platform_id | multi-platform |
| cci_project | ICESHEETS |