This dataset contains time series of ice velocities for the Jakobshavn Glacier in Greenland, which have been derived from intensity-tracking of ERS-1, ERS-2 and Envisat data acquired between between 1992 and 2010. It provides components of the ice velocity and the magnitude of the ice velocity and has been produced as part of the ESA Greenland Ice Sheet Climate Change Initiative (CCI) project.
The dataset contains two time series: 'Greenland_Jakobshavn_TimeSeries_2002_2010' contains an older version of the time series kept for completeness and also to ensure the best temporal coverage. It is based on data from the ASAR instrument on ENVISAT, acquired between 10/11/2002 and 23/09/2010 and contains 47 maps of ice velocity.
The second time series 'greenland_jakobshavn_timeseries_1992_2010' contains the latest version of the time serives based on ERS-1, ERS-2 and Envisat data acquired between 27/01/1992 and 13/06/2010 and contains 120 maps.
The data is provided on a polar stereographic grid (EPSG3413: Latitude of true scale 70N, Reference Longitude 45E) with 500m grid spacing. The image pairs have a repeat cycle between 1 and 35 days.
The horizontal velocity is provided in true meters per day, towards EASTING(x) and NORTHING(y) direction of the grid, and the vertical displacement (z), derived from a digital elevation model, is also provided.
The product was generated by GEUS (Geological Survey of Denmark and Greenland) and ENVEO (Earth Observation Information Technology GmbH).
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No related previous identifiers.
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_greenland_terms_and_conditions.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data were processed by the ESA CCI Greenland Ice Sheet project team and supplied to CEDA in the context of the ESA CCI Open Data Portal Project.
As provided by the CCI Greenland Ice Sheets team
Data are in NetCDF format
Mobile platform operations
|Mobile Platform Operation 1||Mobile Platform Operation for: Envisat|
|Mobile Platform Operation 2||Mobile Platform Operation for: European Remote Sensing satellite 2 (ERS-2)|
|Mobile Platform Operation 3||Mobile Platform Operation for: ERS-1|
Computation Element: 1
|Title||Ice velocity time series derived from intensity tracking of ERS-1, ERS-2 and ENVISAT data for the Greenland Ice Sheet CCI project.|
|Abstract||Ice Velocity time series have been derived from intensity-tracking of ERS-1, ERS-2 and Envisat data for the ESA Climate Change Initiative (CCI) Greenland Ice Sheet project.|
- var_id: crs
- units: m/day
- var_id: land_ice_surface_east_velocity
- units: m/day
- var_id: land_ice_surface_north_velocity
- var_id: time_bnds
- units: m
- long_name: vertical distance above the surface
- var_id: alt
- standard_name: height
- names: height, vertical distance above the surface
- units: m
- standard_name: projection_x_coordinate
- long_name: x coordinate of projection
- var_id: x
- names: projection_x_coordinate, x coordinate of projection
- units: m
- long_name: y coordinate of projection
- standard_name: projection_y_coordinate
- var_id: y
- names: projection_y_coordinate, y coordinate of projection
- long_name: Midpoint time of acquisitons used
- standard_name: time
- var_id: time
- names: time, Midpoint time of acquisitons used