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Correcting for Systematic Underestimation of Topographic Glacier Aerodynamic Roughness Values From Hintereisferner, Austria

Chambers, Joshua R. ; Smith, Mark W. ; Smith, Thomas LU ; Sailer, Rudolf ; Quincey, Duncan J. ; Carrivick, Jonathan L. ; Nicholson, Lindsey ; Mertes, Jordan LU ; Stiperski, Ivana and James, Mike R. (2021) In Frontiers in Earth Science 9.
Abstract

Spatially-distributed values of glacier aerodynamic roughness (z0) are vital for robust estimates of turbulent energy fluxes and ice and snow melt. Microtopographic data allow rapid estimates of z0 over discrete plot-scale areas, but are sensitive to data scale and resolution. Here, we use an extensive multi-scale dataset from Hintereisferner, Austria, to develop a correction factor to derive z0 values from coarse resolution (up to 30 m) topographic data that are more commonly available over larger areas. Resulting z0 estimates are within an order of magnitude of previously validated, plot-scale estimates and aerodynamic values. The method is developed and tested using plot-scale... (More)

Spatially-distributed values of glacier aerodynamic roughness (z0) are vital for robust estimates of turbulent energy fluxes and ice and snow melt. Microtopographic data allow rapid estimates of z0 over discrete plot-scale areas, but are sensitive to data scale and resolution. Here, we use an extensive multi-scale dataset from Hintereisferner, Austria, to develop a correction factor to derive z0 values from coarse resolution (up to 30 m) topographic data that are more commonly available over larger areas. Resulting z0 estimates are within an order of magnitude of previously validated, plot-scale estimates and aerodynamic values. The method is developed and tested using plot-scale microtopography data generated by structure from motion photogrammetry combined with glacier-scale data acquired by a permanent in-situ terrestrial laser scanner. Finally, we demonstrate the application of the method to a regional-scale digital elevation model acquired by airborne laser scanning. Our workflow opens up the possibility of including spatio-temporal variations of z0 within glacier surface energy balance models without the need for extensive additional field data collection.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
aerodynamic roughness, glacier, structure from motion, terrestrial laser scanning, z
in
Frontiers in Earth Science
volume
9
article number
691195
publisher
Frontiers Media S. A.
external identifiers
  • scopus:85107590323
ISSN
2296-6463
DOI
10.3389/feart.2021.691195
language
English
LU publication?
yes
id
661f6e39-cb6f-43e8-b05a-8a5236068c17
date added to LUP
2021-06-29 10:47:04
date last changed
2023-02-21 10:17:55
@article{661f6e39-cb6f-43e8-b05a-8a5236068c17,
  abstract     = {{<p>Spatially-distributed values of glacier aerodynamic roughness (z<sub>0</sub>) are vital for robust estimates of turbulent energy fluxes and ice and snow melt. Microtopographic data allow rapid estimates of z<sub>0</sub> over discrete plot-scale areas, but are sensitive to data scale and resolution. Here, we use an extensive multi-scale dataset from Hintereisferner, Austria, to develop a correction factor to derive z<sub>0</sub> values from coarse resolution (up to 30 m) topographic data that are more commonly available over larger areas. Resulting z<sub>0</sub> estimates are within an order of magnitude of previously validated, plot-scale estimates and aerodynamic values. The method is developed and tested using plot-scale microtopography data generated by structure from motion photogrammetry combined with glacier-scale data acquired by a permanent in-situ terrestrial laser scanner. Finally, we demonstrate the application of the method to a regional-scale digital elevation model acquired by airborne laser scanning. Our workflow opens up the possibility of including spatio-temporal variations of z<sub>0</sub> within glacier surface energy balance models without the need for extensive additional field data collection.</p>}},
  author       = {{Chambers, Joshua R. and Smith, Mark W. and Smith, Thomas and Sailer, Rudolf and Quincey, Duncan J. and Carrivick, Jonathan L. and Nicholson, Lindsey and Mertes, Jordan and Stiperski, Ivana and James, Mike R.}},
  issn         = {{2296-6463}},
  keywords     = {{aerodynamic roughness; glacier; structure from motion; terrestrial laser scanning; z}},
  language     = {{eng}},
  month        = {{05}},
  publisher    = {{Frontiers Media S. A.}},
  series       = {{Frontiers in Earth Science}},
  title        = {{Correcting for Systematic Underestimation of Topographic Glacier Aerodynamic Roughness Values From Hintereisferner, Austria}},
  url          = {{http://dx.doi.org/10.3389/feart.2021.691195}},
  doi          = {{10.3389/feart.2021.691195}},
  volume       = {{9}},
  year         = {{2021}},
}