G3.1/CL4.20/CR8.6/GD11.6/GM11.10/NH11.17Glacial isostatic adjustment and its role in the global earth system (co-organized)
|Convener: Wouter van der Wal | Co-Conveners: Maaria Nordman , Pietro Sternai , Holger Steffen|
Glacial isostatic adjustment (GIA) is the response of the Earth to past and present-day fluctuations of glaciers, ice caps, and ice sheets. Due to the many physical parameters affected, GIA generates measurable changes to sea level, horizontal and vertical crustal motion, as well as the Earth's gravitational field, rotation and stress field. GIA has the potential to influence ice sheet dynamics, predictions of future sea-level change, historic intraplate earthquake activity, and increased volcanic activity during the current interglacial. It is an integral component of the dynamic Earth system.
The effect of GIA is often corrected for in different geoscientific fields by removing its contribution based on methods that do not always include thorough error estimates. Thus, in this session we not only invite papers focusing on global or regional GIA phenomena and/or the usage of observations for determination of Earth's rheological parameters, but also papers that investigate and quantify the likely contribution of GIA in Earth system modelling. As examples, we name here studies dealing with the effect of uncertainty of GIA model predictions on sea-level change, the influence of Earth model parameters on ice dynamics, or potential stress changes in the far field of formerly glaciated areas leading to increased volcanism. In addition, we welcome papers introducing new analyses and collections of GIA observations such as relative sea-level (RSL), tide gauge records, levelling, GNSS, satellite altimetry, terrestrial (absolute and relative) and space-borne gravity measurements. Furthermore, we welcome new modelling developments such as inclusion of crustal/lithospheric structures (sedimentary basins, faults, subduction zones), mantle rheology variation, surface erosion treatment, seismic tomography within GIA regions and contributions to the analysis of potential feedbacks between GIA and climate changes.
Invited speaker: Sarah Woodroffe (Durham, UK)