Error of rate of surface elevation change in meters per year.

Data are based on ESAs Ku-band radar satellite level-2 data
products.

=== Original Data Source ===
1992-2021 Greenland elevation change from multiple altimetric mission

The 2021 CCI Surface Elevation Change (SEC) release contains two
data sets and the release product contains two different types of
data files:
I) png plots of the surface elevation changes and errors.
II) NetCDF files containing the surface elevation changes and
their associated errors:

The two datasets are as follows:
1) The Long time series of 5-year mean SEC from ESAs Ku-band
radar satellite level-2 data products. This data continues the
times-series of previous releases, and this current release is
data version 3.0. Data are based on ESAs Ku-band radar satellite
level-2 data products.
Given the longer time span of operation of the satellites, the
data are provided at a five-year mean. The algorithms used to
derive the product are explained in detail in Simonsen and
Sørensen (2017), and Sørensen et al. (2018). The approach used
here is the most optimal combination of the XO-, TR-, and
PF-algorithm; the data are corrected for both backscatter and
leading-edge width, and solved at 1 km grid resolution, and
averaged in the post-processing to 5 km grid resolution by
ordinary kriging.

2) An experimental 2-year SEC dataset from ICESat-2. This
release contains the first version of this product (vers
1.0). The data are provided at a two-year mean. The TR
algorithms presented in Sørensen et al. (2018) are used to
derive the product, and 1 km grid resolution, and averaged in
the post-processing to 5 km grid resolution by ordinary kriging.

Reference:
Simonsen, S. B., and Sørensen, L. S. (2017) ‘Implications of
changing scattering properties on Greenland ice sheet volume
change from Cryosat-2 altimetry’, Remote Sensing of
Environment. Elsevier Inc., 190, pp. 207–216. DOI:
10.1016/j.rse.2016.12.012.

Sørensen, L. S., Simonsen, S. B., Forsberg, R., Khvorostovsky,
K., Meister, R., and Engdahl, M. E. (2018) '25 years of
elevation changes of the Greenland Ice Sheet from ERS, Envisat,
and CryoSat-2 radar altimetry', Earth and Planetary Science
Letters, 495, pp. 234-241 DOI: 10.1016/j.epsl.2018.05.015.

Citation:
ESA. (2021) 1992-2021 Greenland elevation change from
multiple altimetric mission.  Greenland Ice Sheet CCI
Products.

Citation URL:
http://products.esa-icesheets-cci.org/products/download/cci_sec_2021.zip