Premium
Monsoonal loading in Ethiopia and Eritrea from vertical GPS displacement time series
Author(s) -
Birhanu Yelebe,
Bendick Rebecca
Publication year - 2015
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1002/2015jb012072
Subject(s) - global positioning system , monsoon , precipitation , series (stratigraphy) , displacement (psychology) , geology , vertical displacement , geodesy , climatology , period (music) , amplitude , environmental science , meteorology , geography , geomorphology , engineering , psychology , telecommunications , paleontology , physics , acoustics , psychotherapist , quantum mechanics
Vertical GPS displacement time series from 16 continuous sites over a period from 2007 to 2014 are compared to time series of monthly averages of liquid water equivalent thickness from the Gravity Recovery and Climate Experiment and precipitation from the Climate Research Unit to investigate hydrologic loading in Ethiopia and Eritrea. The GPS vertical time series record the presence of one or two rainy seasons, the amplitude surface displacements in response to monsoon water load, and phases consistent with a purely elastic response to a water load that accumulates throughout the rainy period. Comparison of observed amplitudes to those calculated for an average Earth model shows no systematic weakness related to the rift.