Thu Apr 10, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Agrawal, R., Singh, S. K., Rajawat, A. S., and Ajai, 2014. Estimation of regional mass anomalies from Gravity Recovery and Climate Experiment (GRACE) over Himalayan region. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XL8:329–332, doi:10.5194/isprsarchives-XL-8-329-2014.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2014ISPAr.XL8..329A,
author = {{Agrawal}, R. and {Singh}, S.~K. and {Rajawat}, A.~S. and {Ajai}},
title = "{Estimation of regional mass anomalies from Gravity Recovery and Climate Experiment (GRACE) over Himalayan region}",
journal = {ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
year = 2014,
month = nov,
volume = {XL8},
pages = {329-332},
abstract = "{Time-variable gravity changes are caused by a combination of postglacial
rebound, redistribution of water and snow/ice on land and as
well as in the ocean. The Gravity Recovery and Climate
Experiment (GRACE) satellite mission, launched in 2002, provides
monthly average of the spherical harmonic co-efficient. These
spherical harmonic co-efficient describe earth's gravity field
with a resolution of few hundred kilometers. Time-variability of
gravity field represents the change in mass over regional level
with accuracies in cm in terms of Water Equivalent Height (WEH).
The WEH reflects the changes in the integrated vertically store
water including snow cover, surface water, ground water and soil
moisture at regional scale. GRACE data are also sensitive
towards interior strain variation, surface uplift and surface
subsidence cover over a large area. \textbackslash\textbackslash
GRACE data was extracted over the three major Indian River
basins, Indus, Ganga and Brahmaputra, in the Himalayas which are
perennial source of fresh water throughout the year in Northern
Indian Plain. Time series analysis of the GRACE data was carried
out from 2003-2012 over the study area. Trends and amplitudes of
the regional mass anomalies in the region were estimated using
level 3 GRACE data product with a spatial resolution at 10 by 10
grid provided by Center for Space Research (CSR), University of
Texas at Austin. Indus basin has shown a subtle decreasing trend
from 2003-2012 however it was observed to be statistically
insignificant at 95 \% confidence level. Ganga and Brahmaputra
basins have shown a clear decreasing trend in WEH which was also
observed to be statistically significant. The trend analysis
over Ganga and Brahamputra basins have shown an average annual
change of -1.28 cm and -1.06 cm in terms of WEH whereas Indus
basin has shown a slight annual change of -0.07 cm. This
analysis will be helpful to understand the loss of mass in terms
of WEH over Indian Himalayas and will be crucial for
hydrological and climate applications at regional scale.}",
doi = {10.5194/isprsarchives-XL-8-329-2014},
adsurl = {https://ui.adsabs.harvard.edu/abs/2014ISPAr.XL8..329A},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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