Michael J. Willis, Byrd Polar Research Center and School of Earth Sciences, Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210
Continuous GPS observations have been made at several remote sites in southern Victoria Land, Antarctica. Filtered time series from two representative remote sites are examined in order to ascertain the effects on vertical positions of expected regional geophysical loads such as hydrological loading, ocean tide loading and atmospheric pressure loading (APL). The time series is relatively insensitive to ocean loading as 24-hour data sets are used. Trends in APL calculated using the European Center for Medium Range Weather Forecasting standard model coupled to a simple elastic Earth model are correlated to site position. APL magnitudes however, cannot simply be removed from our time series without increasing the noise in the time series. Future tuning of atmospheric and ocean loading models and creation of suitable multipath maps for individual stations should allow hydrological loads such as snow melt or glacier changes to be reliably resolved.
[Manuscript]
