Greenland Ice Mass Change
We provide time series of storage variations in gigatons (Gt) for 7 major drainage basins of the Greenland ice sheet. Empirical uncertainty estimates are included. The basin definition follows Sasgen et al. (2012), and will be made available as a separate file. The inversion method adjusts an a priori distribution of mass change (forward model) to the GRACE data by the method of least squares.
In addition, a gridded product is provided based on the processing standards used for generating ESA CCI ice sheet products (Groh & Horwath, 2016). This product is provided in terms of mass changes per surface area (kg/m²). At the basin level, both data sets agree within the monthly GRACE uncertainty.
The Glacial Isostatic Adjustment (GIA) correction applied is ICE-5G / VM2 (click here for more details ). Alternative GIA corrections are under development by the processing team and will be provided alongside the ice products in due course.
Sasgen, I., van den Broeke, M., Bamber, J.L., Rignot, E., Sørensen, L.S., Wouters, B., Martinec, Z., Velicogna, I., Simonsen, S.B., 2012:
Timing and origin of recent regional ice-mass loss in Greenland
Earth and Planetary Science Letters, 333, p. 293—303 , https://doi.org/10.1016/j.epsl.2012.03.033
Groh, A., Horwath, M., 2016:
The method of tailored sensitivity kernels for GRACE mass change estimates
Geophysical Research Abstracts, 18, EGU2016-12065