Dataset
ESA Antarctic Ice Sheet Climate Change Initiative (Antarctic_Ice_Sheet_cci): Antarctic Ice Sheet monthly velocity from 2017 to 2020, derived from Sentinel-1, v1
Abstract
This dataset contains monthly gridded ice velocity maps of the Antarctic Ice Sheet derived from Sentin
el-1 data acquired between 2017-01-01 and 2020-08-31. It was generated by ENVEO, as part of the ESA Antarctic Ice Sheet Climate Change Initiative project (Antarctic_Ice_Sheet_cci).
The surface velocity is derived by applying feature tracking techniques using Sentinel-1 synthetic aperture radar (SAR) data acquired in the Interferometric Wide (IW) swath mode. Ice velocity is provided at 200m grid spacing in Polar Stereographic projection (EPSG: 3031). The horizontal velocity components are provided in true meters per day, towards easting and northing direction of the grid. The vertical displacement is derived from a digital elevation model. Provided is a NetCDF file with the velocity components: vx, vy, vz, along with maps showing the magnitude of the horizontal components, the valid pixel count and uncertainty. The product combines all ice velocity maps, based on 6- and 12-day repeats, acquired within a single month in a monthly averaged product.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/esacci_icesheets_antarctic_terms_and_conditions.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were processed by ENVEO as part of the ESA Antarctic Ice sheet CCI project and are archived on the ENVEO Cryoportal (http://cryoportal.enveo.at). They have been supplied to CEDA in the context of the ESA CCI Open Data Portal Project |
| Data Quality: |
Data are as given by the data provider. For more information see the Antarctic Ice Sheets CCI project documentation
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| File Format: |
Data are in NetCDF format
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Related Documents
| ESA Climate Change Initiative website |
| Antarctic Ice Sheets CCI project webpages |
| Product User Guide |
Citations: 1
The following citations have been automatically harvested from external sources associated with this resource where DOI tracking is possible. As such some citations may be missing from this list whilst others may not be accurate. Please contact the helpdesk to raise any issues to help refine these citation trackings.
| Picton, H.J., Stokes, C.R., Jamieson, S.S.R., Floricioiu, D. & Krieger, L. (2023) Extensive and anomalous grounding line retreat at Vanderford Glacier, Vincennes Bay, Wilkes Land, East Antarctica. The Cryosphere 17, 3593–3616. https://doi.org/10.5194/tc-17-3593-2023 https://doi.org/10.5194/tc-17-3593-2023 |
Process overview
Instrument/Platform pairings
| Sentinel 1 Synthetic Aperture Radar (SAR) | Deployed on: Sentinel 1A |
| Sentinel 1 Synthetic Aperture Radar (SAR) | Deployed on: Sentinel 1B |
Computation Element: 1
| Title | Derivation of the Antarctic Ice Sheet CCI Ice Velocity v1 dataset from Sentinel-1 |
| Abstract | The surface velocity is derived by applying feature tracking techniques using Sentinel-1 synthetic aperture radar (SAR) data acquired in the Interferometric Wide (IW) swath mode. Ice velocity is provided at 200m grid spacing in Polar Stereographic projection (EPSG: 3031). The horizontal velocity components are provided in true meters per day, towards easting and northing direction of the grid. The vertical displacement is derived from a digital elevation model. Provided is a NetCDF file with the velocity components: vx, vy, vz, along with maps showing the magnitude of the horizontal components, the valid pixel count and uncertainty. The product combines all ice velocity maps, based on 6- and 12-day repeats, acquired within a single month in a monthly averaged product. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
- var_id: crs
- units: m/day
- var_id: land_ice_surface_easting_stddev
- units: m/day
- var_id: land_ice_surface_easting_velocity
- units: m/day
- var_id: land_ice_surface_measurement_count
- units: m/day
- var_id: land_ice_surface_northing_stddev
- units: m/day
- var_id: land_ice_surface_northing_velocity
- units: m/day
- var_id: land_ice_surface_velocity_magnitude
- units: m/day
- var_id: land_ice_surface_vertical_velocity
- units: m
- var_id: x
- standard_name: projection_x_coordinate
- long_name: x coordinate of projection
- units: m
- var_id: y
- standard_name: projection_y_coordinate
- long_name: y coordinate of projection
Co-ordinate Variables
- long_name: time
- standard_name: time
- var_id: time
Temporal Range
2017-01-01T00:00:00
2020-08-31T23:59:59
Geographic Extent
-56.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |