scholarly journals Contribution of GRACE Satellite Gravimetry in Global and Regional Hydrology, and in Ice Sheets Mass Balance

10.5772/34212 ◽  
2012 ◽  
Author(s):  
Frappart Frdric ◽  
Ramillien Guillaume
Keyword(s):  
Mass Balance ◽  
Ice Sheets ◽  
Satellite Gravimetry ◽  
Regional Hydrology ◽  
Grace Satellite Gravimetry ◽  
Grace Satellite

Improved Quantification of Global Mean Ocean Mass Change Using GRACE Satellite Gravimetry Measurements

2019 ◽  
Vol 46 (23) ◽  
pp. 13984-13991 ◽  
Author(s):  
Jianli Chen ◽  
Byron Tapley ◽  
Ki‐Weon Seo ◽  
Clark Wilson ◽  
John Ries
Keyword(s):  
Mass Change ◽  
Satellite Gravimetry ◽  
Ocean Mass ◽  
Grace Satellite Gravimetry ◽  
Grace Satellite ◽  
Global Mean

scholarly journals Using GRACE Satellite Gravimetry for Assessing Large-Scale Hydrologic Extremes

2017 ◽  
Vol 9 (12) ◽  
pp. 1287 ◽  
Author(s):  
Alexander Sun ◽  
Bridget Scanlon ◽  
Amir AghaKouchak ◽  
Zizhan Zhang
Keyword(s):  
Large Scale ◽  
Satellite Gravimetry ◽  
Grace Satellite Gravimetry ◽  
Grace Satellite ◽  
Hydrologic Extremes

scholarly journals Antarctic ice-mass balance 2003 to 2012: regional reanalysis of GRACE satellite gravimetry measurements with improved estimate of glacial-isostatic adjustment based on GPS uplift rates

2013 ◽  
Vol 7 (5) ◽  
pp. 1499-1512 ◽  
Author(s):  
I. Sasgen ◽  
H. Konrad ◽  
E. R. Ivins ◽  
M. R. Van den Broeke ◽  
J. L. Bamber ◽  
...  
Keyword(s):  
Mass Balance ◽  
Regional Scale ◽  
Mass Movement ◽  
Glacial Isostatic Adjustment ◽  
Glacial Cycle ◽  
Amundsen Sea ◽  
Satellite Gravimetry ◽  
Isostatic Adjustment ◽  
Uplift Rates ◽  
Grace Satellite Gravimetry

Abstract. We present regional-scale mass balances for 25 drainage basins of the Antarctic Ice Sheet (AIS) from satellite observations of the Gravity and Climate Experiment (GRACE) for time period January 2003 to September 2012. Satellite gravimetry estimates of the AIS mass balance are strongly influenced by mass movement in the Earth interior caused by ice advance and retreat during the last glacial cycle. Here, we develop an improved glacial-isostatic adjustment (GIA) estimate for Antarctica using newly available GPS uplift rates, allowing us to more accurately separate GIA-induced trends in the GRACE gravity fields from those caused by current imbalances of the AIS. Our revised GIA estimate is considerably lower than previous predictions, yielding an estimate of apparent mass change of 53 ± 18 Gt yr−1. Therefore, our AIS mass balance of −114 ± 23 Gt yr−1 is less negative than previous GRACE estimates. The northern Antarctic Peninsula and the Amundsen Sea sector exhibit the largest mass loss (−26 ± 3 Gt yr−1 and −127 ± 7 Gt yr−1, respectively). In contrast, East Antarctica exhibits a slightly positive mass balance (26 ± 13 Gt yr−1), which is, however, mostly the consequence of compensating mass anomalies in Dronning Maud and Enderby Land (positive) and Wilkes and George V Land (negative) due to interannual accumulation variations. In total, 6% of the area constitutes about half the AIS imbalance, contributing 151 ± 7 Gt yr−1 (ca. 0.4 mm yr−1) to global mean sea-level change. Most of this imbalance is caused by ice-dynamic speed-up expected to prevail in the near future.

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