Comparison of force balance calibration techniques for the nano-Newton range

2003 ◽  
Vol 74 (12) ◽  
pp. 5249-5254 ◽  
Author(s):  
Nathaniel P. Selden ◽  
Andrew D. Ketsdever
Keyword(s):  
Force Balance ◽  
Calibration Techniques ◽  
Balance Calibration

scholarly journals Evaluation of Cryogenic Force Balance Calibration Methodologies Relative to Wind Tunnel Results

2019 ◽  
Vol 56 (4) ◽  
pp. 1398-1406
Author(s):  
Devin E. Burns ◽  
Kenneth G. Toro ◽  
Peter A. Parker ◽  
S. Melissa Rivers ◽  
Harald Quix ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Force Balance ◽  
Balance Calibration

scholarly journals Comparison of hybrid schemes for the combination of shallow approximations in numerical simulations of the Antarctic Ice Sheet

2017 ◽  
Vol 11 (1) ◽  
pp. 247-265 ◽  
Author(s):  
Jorge Bernales ◽  
Irina Rogozhina ◽  
Ralf Greve ◽  
Maik Thomas
Keyword(s):  
Ice Sheet ◽  
Force Balance ◽  
Iterative Technique ◽  
Ice Streams ◽  
Ice Dynamics ◽  
Antarctic Ice Sheet ◽  
Hybrid Schemes ◽  
Basal Sliding ◽  
Calibration Techniques ◽  
The Antarctic

Abstract. The shallow ice approximation (SIA) is commonly used in ice-sheet models to simplify the force balance equations within the ice. However, the SIA cannot adequately reproduce the dynamics of the fast flowing ice streams usually found at the margins of ice sheets. To overcome this limitation, recent studies have introduced heuristic hybrid combinations of the SIA and the shelfy stream approximation. Here, we implement four different hybrid schemes into a model of the Antarctic Ice Sheet in order to compare their performance under present-day conditions. For each scheme, the model is calibrated using an iterative technique to infer the spatial variability in basal sliding parameters. Model results are validated against topographic and velocity data. Our analysis shows that the iterative technique compensates for the differences between the schemes, producing similar ice-sheet configurations through quantitatively different results of the sliding coefficient calibration. Despite this we observe a robust agreement in the reconstructed patterns of basal sliding parameters. We exchange the calibrated sliding parameter distributions between the schemes to demonstrate that the results of the model calibration cannot be straightforwardly transferred to models based on different approximations of ice dynamics. However, easily adaptable calibration techniques for the potential distribution of basal sliding coefficients can be implemented into ice models to overcome such incompatibility, as shown in this study.

TWO METHODS FOR CALIBRATION OF STRAIN-GAUGE BALANCES USING TSAGI BALANCE CALIBRATION MACHINES

2017 ◽  
Vol 48 (2) ◽  
pp. 187-197 ◽  
Author(s):  
Valerii Semyonovich Volobuyev ◽  
Anton Roaldovich Gorbushin ◽  
Iraida Alekseevna Sudakova ◽  
V. I. Tikhomirov
Keyword(s):  
Strain Gauge ◽  
Balance Calibration
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