Thu Apr 10, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zou, Rong, Wang, Qi, Freymueller, Jeffrey T., Poutanen, Markku, Cao, Xuelian, Zhang, Caihong, Yang, Shaomin, and He, Ping, 2015. Seasonal Hydrological Loading in Southern Tibet Detected by Joint Analysis of GPS and GRACE. Sensors, 15(12):30525–30538, doi:10.3390/s151229815.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2015Senso..1530525Z,
author = {{Zou}, Rong and {Wang}, Qi and {Freymueller}, Jeffrey T. and {Poutanen}, Markku and {Cao}, Xuelian and {Zhang}, Caihong and {Yang}, Shaomin and {He}, Ping},
title = "{Seasonal Hydrological Loading in Southern Tibet Detected by Joint Analysis of GPS and GRACE}",
journal = {Sensors},
keywords = {seasonal variations, GRACE, GPS, vertical deformation, horizontal deformation},
year = 2015,
month = dec,
volume = {15},
number = {12},
pages = {30525-30538},
abstract = "{In southern Tibet, ongoing vertical and horizontal motions due to the
collision between India and Eurasia are monitored by large
numbers of global positioning system (GPS) continuous and
campaign sites installed in the past decade. Displacements
measured by GPS usually include tectonic deformation as well as
non-tectonic, time-dependent signals. To estimate the regional
long-term tectonic deformation using GPS more precisely,
seasonal elastic deformation signals associated with surface
loading must be removed from the observations. In this study, we
focus on seasonal variation in vertical and horizontal motions
of southern Tibet by performing a joint analysis of GRACE
(Gravity Recovery and Climate Experiment) and GPS data, not only
using continuous sites but also GPS campaign-mode sites. We
found that the GPS-observed and GRACE-modeled seasonal
oscillations are in good agreements, and a seasonal displacement
model demonstrates that the main reason for seasonal variations
in southern Tibet is from the summer monsoon and its
precipitation. The biggest loading appears from July to August
in the summer season. Vertical deformations observed by GPS and
modeled by GRACE are two to three times larger than horizontal
oscillations, and the north components demonstrate larger
amplitudes than the east components. We corrected the GPS
position time series using the GRACE-modeled seasonal
variations, which gives significant reductions in the misfit and
weighted root-mean-squares (WRMS). Misfit ( {\ensuremath{\chi}}
2 divided by degree of freedom) reductions for campaign sites
range between 20\% and 56\% for the vertical component, and are
much smaller for the horizontal components. Moreover, time
series of continuous GPS (cGPS) sites near the 2015 Nepal
earthquakes must be corrected using appropriate models of
seasonal loading for analyzing postseismic deformation to avoid
biasing estimates of the postseismic relaxation.}",
doi = {10.3390/s151229815},
adsurl = {https://ui.adsabs.harvard.edu/abs/2015Senso..1530525Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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