Greenland Surface Strain Rates & Stresses (greenlandstrainrate)
Project by group ghub
About
These datasets 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.
Unfortunately, the text editor does not support equations. 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 "Stresses from Strain Rates" for formulas.
References
Joughin, I., Smith, B. E., Howat, I., and Scambos, T. (2016). "MEaSUREs Multi-year Greenland Ice Sheet Velocity Mosaic, Version 1", NASA National Snow and Ice Data Center Distributed Active Archive Center, doi:10.5067/QUA5Q9SVMSJG. NSIDC-0670.
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.
Team
- Abani Patra
- Alek Petty
- Alex Becerra
- Alexander Robinson
- Amy Steiker
- Andy Aschwanden
- Aurelien Quiquet
- Beata Maria Csatho
- Bette Otto-Bliesner
- Brandon L Graham
- Brooke Medley
- Carolyn Kay Weisman
- Chris Chambers
- Christophe Dumas
- Claire Stirm
- Dan Lowry
- Daniel Martin
- Denis Felikson
- Donald Slater
- Dorothy K. Hall
- Elliot Snitzer
- Elliot Test
- Eric Joseph Cicero
- Eric Larour
- Erich Huebner
- Erika Simon
- Erin Pettit
- Fernando Perez
- Gunter Leguy
- Heiko Goelzer
- Helene Seroussi
- Ian Joughin
- Ilya Shunko
- Isabel Nias
- Ivan Parmuzin
- jason briner
- Jeanette Sperhac
- Joerg Schaefer
- Jonas Van Breedam
- Jonny Kingslake
- Joseph P Tulenko
- Justin Quinn
- Kate Thayer-Calder
- Kirsty Tinto
- Konstanze Haubner
- Kristin Poinar
- Leigh Orf
- Lev Tarasov
- Lionel Favier
- Ludo Brucker
- Luke Trusel
- Martin Ruckamp
- Matthew Hoffman
- Michael Studinger
- Michalea King
- Nicholas Holschuh
- Nicolas Jourdain
- Nicole Abib
- Nicole Keeney
- Nicole Schlegel
- Nicolo DiGirolamo
- Palak Patel
- Pascal Meunier
- Prashant Shekhar
- Ralf Greve
- Renette Jones-Ivey
- Richard Cullather
- Ronja Reese
- Rupert Gladstone
- Sainan Sun
- Sébastien Le Clech
- Shane Grigsby
- sophie nowicki
- Stephen Cornford
- Steven Price
- Tamsin Edwards
- Tasha Snow
- Thomas Kleiner
- Tong Zhang
- Tore Hattermann
- Twila Moon
- Tyler Pelle
- Victoria Lee
- William Lipscomb
- Xylar Asay-Davis
- Youngmin Choi