Sub-Monthly Mass Change Signal over the Ilulissat Glacier in Greenland from GRACE-FO Laser Interferometry Data

Description

Using measurements of the orbital motion and the K-Band measurements of the distance between the two GRACE(-FO) satellites, the different analysis centres produce monthly gravity fields. From these solutions, we gained great insight into the water cycle, ice mass balance and ocean currents for the past twenty years. But these monthly solutions are not the full picture. To extract sub monthly signal, one needs to look at the Level-1B data. Currently, the data used to extract the GRACE-FO orbits, contains the KBR measurements but not the data from the LRI instrument. It has been shown several times that using orbits and LRI data, one can calculate residual Line-of-sight gravity signals. These studies mostly looked at the amazon regions to look at changes in the water storage which happen faster than over one month. We use this approach to look at the changes in speed of the llulissat glacier in Greenland. This is one of the biggest and fastest glaciers in Greenland and significant changes in its speed can happen over as little as one week. We show first results of this method used for the area of West Greenland and discuss further steps to get sub-monthly mass change results.

Period	10 Dec 2023
Event title	AGU Fall Meeting 2023
Event type	Conference
Location	San Francisco, United States, CaliforniaShow on map
Degree of Recognition	International