Personne

Katherine Colby Leonard

Cette personne n’est plus à l’EPFL

Publications associées (28)

LES modeling of wind over Antarctic snow-ice formations using a dynamic surface roughness approach

Michael Lehning, Marc Parlange, Katherine Colby Leonard, Charles Vivant Ignacio Meneveau, Ernesto Trujillo Gomez, Marco Giovanni Giometto

Abstract A43A-0223 ...

2013

Spatial patterns of aeolian sediment deposition in vegetation canopies: observations from wind tunnel experiments using colored sand

Katherine Colby Leonard

In environments affected by wind erosion, plants act as traps for aeolian sediment, which leads to a small-scale mosaic of depositional and erosional sediment transport regimes. This wind tunnel study used colored sand to visualize spatial patterns of sedi ...

Elsevier2013

Spatially resolved skin friction velocity measurements using Irwin sensors: A calibration and accuracy analysis

Michael Lehning, Katherine Colby Leonard, Benjamin Andreas Walter

This study investigates the accuracy of spatially resolved skin friction velocity ut measurements using a large number of Irwin sensors (Irwin, 1981). A fast and simple procedure to calibrate the sensors against a two-component hot-film anemometer is intro ...

Elsevier2012

Spatially resolved skin friction velocity measurements using Irwin sensors: A calibration and accuracy analysis

Michael Lehning, Katherine Colby Leonard, Benjamin Andreas Walter

This study investigates the accuracy of spatially resolved skin friction velocity uτ measurements using a large number of Irwin sensors (Irwin, 1981). A fast and simple procedure to calibrate the sensors against a two-component hot-film anemometer is intro ...

2012

Spatio-Temporal Surface Shear-Stress Variability in Live Plant Canopies and Cube Arrays

Michael Lehning, Katherine Colby Leonard, Benjamin Andreas Walter

This study presents spatiotemporally-resolved measurements of surface shear-stress tau (s) in live plant canopies and rigid wooden cube arrays to identify the sheltering capability against sediment erosion of these different roughness elements. Live plants ...

Springer Netherlands2012

Drifting snow threshold measurements near McMurdo station, Antarctica: A sensor comparison study

Katherine Colby Leonard

We present the results of an Antarctic spring field study of snow drift threshold measurements made using two custom drift sensors and a commercial parts-counting device. All three sensor types worked well at detecting drifting snow events, but the sensors ...

Elsevier2012

Spatio-temporal surface shear stress variability in live plant canopies and cube arrays

Michael Lehning, Katherine Colby Leonard, Benjamin Andreas Walter

This study presents spatiotemporally-resolved measurements of surface shear-stress τ s in live plant canopies and rigid wooden cube arrays to identify the sheltering capability against sediment erosion of these different roughness elements. Live plants hav ...

Springer Verlag2012

The influence of winds, sea-surface temperature and precipitation anomalies on Antarctic regional sea-ice conditions during IPY 2007

Katherine Colby Leonard

The 2007 International Polar Year (IPY) in the Antarctic was distinguished by strong regional and seasonal ice-atmosphere-ocean anomalies associated with an overall weakening of the prevailing westerly circulation. Here we assess the ice-atmosphere-ocean c ...

2011

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