Greenland Surface Strain Rates & Stresses ...
These datasets available via Ghub are 2D principal strain rates and principal stresses across the surface of the Greenland Ice Sheet. We started with representative surface velocities over a 20-year period (Joughin et al., 2016). We smoothed the velocities with a 1 km × 1 km boxcar filter, which car...
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| Format: | Dataset |
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The Ghub
2024
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| Online Access: | https://dx.doi.org/10.5281/zenodo.11175986 https://zenodo.org/doi/10.5281/zenodo.11175986 |
| Summary: | These datasets available via Ghub are 2D principal strain rates and principal stresses across the surface of the Greenland Ice Sheet. We started with representative surface velocities over a 20-year period (Joughin et al., 2016). We smoothed the velocities with a 1 km × 1 km boxcar filter, which carries through many high-strain-rate features. We propagated errors in the velocity observations through this filter and then calculated the two horizontal principal strain rates by taking centered spatial derivatives of the smoothed velocities. We calculated the errors in these strain rates following basic error propagation principles. The equations for principal strain rates and their errors can be found as Equations 1-4 in Poinar & Andrews (2021), "Challenges in predicting Greenland supraglacial lake drainages at the regional scale", The Cryosphere, 15, 1455–1483, doi:10.5194/tc-15-1455-2021. Finally, we also convert surface strain rates into surface stresses using Glen's flow law. See attachment pdf ... |
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