Dataset: ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Ice Velocity time series for the Helheim Glacier for 2015-2017 from Sentinel-1 data, v1.1#
Dataset identifier: esacci.ICESHEETS.unspecified.L4.IV.SAR-C-(Sentinel-1).multi-platform.UNSPECIFIED.1-1.greenland_s1_250m_20150610_20170321_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.L4.IV.SAR-C-(Sentinel-1).multi-platform.UNSPECIFIED.1-1.greenland_s1_250m_20150610_20170321_Helheim')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.ICESHEETS.unspecified.L4.IV.SAR-C-(Sentinel-1).multi-platform.UNSPECIFIED.1-1.greenland_s1_250m_20150610_20170321_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 | 2015-06-09 to 2017-03-21 |
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 |
|---|---|---|
| alt | Height above WGS84 | m |
| land_ice_surface_east_velocity | [none] | m/day |
| land_ice_surface_north_velocity | [none] | m/day |
Full variable metadata#
crs#
| Field | Value |
|---|---|
| grid_mapping_name | polar_stereographic |
| standard_parallel | 70.0 |
| straight_vertical_longitude_from_pole | -45.0 |
| false_easting | 0.0 |
| false_northing | 0.0 |
| unit | metre |
| latitude_of_projection_origin | 90.0 |
| 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\"]] |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 1 |
| shape | 1 |
| chunk_sizes | 1 |
| file_chunk_sizes | 1 |
| data_type | int64 |
| dimensions | |
| file_dimensions |
alt#
| Field | Value |
|---|---|
| standard_name | height |
| long_name | Height above WGS84 |
| units | m |
| description | Heights (WGS84 used for velocity projection) |
| source | External ( Greenland Ice Mapping Project (GIMP) 250m DEM ) |
| grid_mapping | crs |
| coordinates | y x |
| orig_data_type | int16 |
| fill_value | -9999 |
| size | 381999 |
| shape | 669, 571 |
| chunk_sizes | 669, 571 |
| file_chunk_sizes | 669, 571 |
| data_type | int16 |
| dimensions | y, x |
| file_dimensions | y, x |
land_ice_surface_east_velocity#
| Field | Value |
|---|---|
| description | eastwards ice velocity |
| grid_mapping | crs |
| coordinates | time y x |
| cell_methods | spatial filter (smooth: median 3x3, gapfill: planefit 5,5) |
| units | m/day |
| orig_data_type | float32 |
| fill_value | 3.4028235e+38 |
| size | 27121929 |
| shape | 71, 669, 571 |
| chunk_sizes | 18, 223, 191 |
| file_chunk_sizes | 18, 223, 191 |
| data_type | float32 |
| dimensions | time, y, x |
| file_dimensions | time, y, x |
land_ice_surface_north_velocity#
| Field | Value |
|---|---|
| units | m/day |
| description | northwards ice velocity |
| grid_mapping | crs |
| coordinates | time y x |
| cell_methods | spatial filter (smooth: median 3x3, gapfill: planefit 5,5) |
| orig_data_type | float32 |
| fill_value | 3.4028235e+38 |
| size | 27121929 |
| shape | 71, 669, 571 |
| chunk_sizes | 18, 223, 191 |
| file_chunk_sizes | 18, 223, 191 |
| data_type | float32 |
| dimensions | time, y, x |
| file_dimensions | time, y, x |
Full dataset metadata#
| Field | Value |
|---|---|
| product_version | 1-1 |
| title | ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Ice Velocity time series for the Helheim Glacier for 2015-2017 from Sentinel-1 data, v1.1 |
| project | ESA Greenland Ice Sheet CCI |
| ecv | ICESHEETS |
| institute | ENVironmental Earth Observation IT GmbH |
| processing_level | L4 |
| product_string | UNSPECIFIED |
| data_type | IV |
| sensor_id | SAR-C-(Sentinel-1) |
| abstract | This dataset contains a time series of ice velocities for the Helheim Glacier in Greenland derived from Sentinel-1 SAR (Synthetic Aperture Radar) data acquired between between June 2015 and March 2017. It has been produced by the ESA Greenland Ice Sheet Climate Change Initiative (CCI) project. Data files are delivered in NetCDF format at 250m grid spacing in North Polar Stereographic projection (EPSG: 3413). The horizontal velocity components are provided in true meters per day, towards the EASTING(x) and NORTHING(y) directions of the grid. |
| publication_date | 2019-02-04T16:05:18 |
| uuid | 0e289294f2c141bca545cd9d7fcb62d0 |
| catalog_url | https://catalogue.ceda.ac.uk/uuid/0e289294f2c141bca545cd9d7fcb62d0 |
| platform_id | multi-platform |
| cci_project | ICESHEETS |