|Upload date||27 Oct 2021|
|File size||42.3 MB|
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.
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