Faculty Candidate Seminar - Adrian Borsa

01/19/2016 - 2:00pm


DATE:  January 19, Tuesday, 2:00 p.m.  

LOCATION: Hubbs Hall 4500 
SPEAKER:  Adrian Borsa, Ph.D.
Scripps Institution of Oceanography, UCSD

TITLE:  Continuous GPS observations of crustal loading from hydrometeorological events on the scale of storms to drought

Recent studies using continuous GPS to estimate changes in terrestrial water storage point to a future where the global GPS infrastructure for monitoring crustal deformation can be leveraged for hydrological applications. Seasonal water and snow loading has long been known to generate an elastic earth response that is observable by GPS, but only recently have these signals been modeled to recover the underlying loads at local and regional scales. My earlier work with colleagues at Scripps showed that GPS can be used to monitor subtle surface deformation due to the response of the hydrological system to drought, and to estimate the magnitude and spatial distribution of related water loss. Recently, I have extended the temporal range of this analysis from drought-focused interannual signals to event-scale loading from individual storms, and I have started using satellite gravimetry data from NASA’s GRACE mission to constrain GPS observations. These new efforts are revealing the promise and challenges of using GPS to study crustal deformation across the temporal spectrum, with relevance to geophysical problems such as seismic triggering and the fingerprinting analysis of vertical deformation.

Faculty Host:  Kerry Key  (kkey@ucsd.edu)
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Hubbs Hall 4500