|Upload date||27 Jun 2016|
|File size||21.2 MB|
Greenland SEC grids from Cryosat-2. 2-yr and 5-yr means for 2011-2015.
The Cryosat2 Surface Elevation Change (SEC) version 2 product contains three different types of data files:
1) png plots of the surface elevation changes and their associated errors
2) gridded ASCII files of the surface elevation changes and their associated errors
3) netCDF files containing the surface elevation changes and their associated errors
Data are based on ESA’s Baseline C product.
Given the longer time span of operation of the satellite, the data are now provided in 2-year means (2011-2012, 2012-2013, 2013-2014 and 2014-2015). A five-year mean is also provided (2011-2015).
The algorithms used to derive the product are explained in detail in “Implications of changing scattering properties on the Greenland ice sheet volume change from Cryosat-2 altimetry” by S.B. Simonsen and L.S. Sørensen, submitted to Remote Sensing of Environment. The approach used here corresponds to Least Squares Method (LSM) as described in the paper, in which the slope within each grid cell is accounted for by subtraction of the GIMP DEM; the data are corrected for both backscatter and leading edge width; and the LSM is solved at 1 km grid resolution (2 km search radius) and averaged in the post-processing to 5 km grid resolution and with a correlation length of 20 km.
The project documents which can be found on the project website also provide further information.