Monitoring Glacial Isostatic Adjustment in the Great Lakes Region Using GPS
Abstract
Monitoring glacial isostatic adjustment (GIA) is uniquely important in the Great Lakes region as it is an area where uplift transitions to subsidence. In order to build on current and past efforts to examine and model vertical and horizontal crustal motion in this region, the Canadian Hydrographic Service (CHS) in partnership with the Canadian Geodetic Survey (CGS) have worked to densify the existing network of continuously operated reference stations that provide Global Navigation Satellite System (GNSS) data at water level gauging stations. These stations, known as Regional Active Control Stations (RACS), are part of the wider Canadian Active Control System (CACS) network. There are now 12 RACS at permanent water level gauges around the Great Lakes. GPS receiver installations began in 2002 with Kingston, Port Weller, Parry Sound, and Rossport; followed by Michipicoten in 2009; Little Current, Kingsville, and Cobourg in 2011; Goderich in 2013; and the most recent installations in Port Stanley, Tobermory and Collingwood in 2017. GNSS data provided by these 12 stations are being used to improve regional vertical velocity models and enable a more localized approach to determining areas with the greatest vertical movement.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.G43E0743L
- Keywords:
-
- 9805 Instruments useful in three or more fields;
- GENERAL OR MISCELLANEOUSDE: 1222 Ocean monitoring with geodetic techniques;
- GEODESY AND GRAVITYDE: 1641 Sea level change;
- GLOBAL CHANGEDE: 4294 Instruments and techniques;
- OCEANOGRAPHY: GENERAL