Mass Transport Separation via Grace: Anthropogenic and Natural Change

The GRACE satellite has been monitoring the change in the mass distribution at the Earth surface for nearly 10 years. This becomes enough to study long-term mass change, and to separate interannual variations from trends. Up to now, many studies have shown a fast (and non-linear) loss of mass in many glaciers and ice sheets. They all have been attributed to global warming, though part of the mass variation is also associated with the classical long-term climate variation. Using climatic data as well as the GRACE mascon solution, we can separate the part associated to the anthropogenic part from the non-anthropogenic part, in order to better estimate those contributions. Results and implications from our analyses will be presented.