Isolating the Present-Day Hydrological Mass Change Signal in GNSS and GRACE Observations from Eastern North America ...

• Main Authors: Parang, Soran, Karegar, Makan A., Crowley, John W., Milne, Glenn A.
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Canada; Ice Sheet
• Online Access: https://dx.doi.org/10.57757/iugg23-2496; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018251

<!--!introduction!--> Much of the Atlantic coast of North America has been sinking for thousands of years, at a maximum rate of ~20 cm per century, due to solid Earth deformation in response to deglaciation of the Laurentide ice sheet – a process known as glacial isostatic adjustment (GIA). In addition to GIA, other factors, including recent human intervention in water sources (such as excessive groundwater usage and damming) might be significant contributors to vertical land motion (VLM) in the region. The primary aim of this research is to isolate and better understand the contribution of recent hydrological loading to the VLM signal in southeastern Canada and northeastern USA. To this end, we use results from an extensive GIA modelling analysis based on a large ensemble of 14960 Earth-ice model input parameters and two regional paleo RSL data compilations, as well as millennial-scale VLM rates derived from RSL reconstructions, to identify areas where the contemporary VLM rates cannot be explained by ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...