Outputs (103)

Cold-to-warm flow regime transition in snow avalanches (2018)
Journal Article
Köhler, A., Fischer, J.-T., Scandroglio, R., Bavay, M., McElwaine, J., & Sovilla, B. (2018). Cold-to-warm flow regime transition in snow avalanches. The Cryosphere, 12(12), 3759-3774. https://doi.org/10.5194/tc-12-3759-2018

Large avalanches usually encounter different snow conditions along their track. When they release as slab avalanches comprising cold snow, they can subsequently develop into powder snow avalanches entraining snow as they move down the mountain. Typic... Read More about Cold-to-warm flow regime transition in snow avalanches.

The intermittency regions of powder snow avalanches (2018)
Journal Article
Sovilla, B., McElwaine, J., & Köhler, A. (2018). The intermittency regions of powder snow avalanches. Journal of Geophysical Research: Earth Surface, 123(10), 2525-2545. https://doi.org/10.1029/2018jf004678

Powder snow avalanches are typically composed of several regions characterized by different flow regimes. These include a turbulent suspension cloud of fine particles, a dense basal flow and an intermittency frontal region, which is characterized by... Read More about The intermittency regions of powder snow avalanches.

From episodic avalanching to continuous flow in a granular drum (2018)
Journal Article
Balmforth, N., & McElwaine, J. (2018). From episodic avalanching to continuous flow in a granular drum. Granular Matter, 20(3), Article 52. https://doi.org/10.1007/s10035-018-0822-1

Experiments are conducted to study the transition from episodic avalanching (slumping) to continuous flow (rolling) in drums half full of granular material. The width and radius of the drum is varied and different granular materials are used, ranging... Read More about From episodic avalanching to continuous flow in a granular drum.

GEODAR Data and the Flow Regimes of Snow Avalanches (2018)
Journal Article
Köhler, A., McElwaine, J., & Sovilla, B. (2018). GEODAR Data and the Flow Regimes of Snow Avalanches. Journal of Geophysical Research, 123(6), 1272-1294. https://doi.org/10.1002/2017jf004375

GEODAR, a custom radar system, images avalanches over the entire slope with high spatial and temporal resolution at the experimental test‐site Vallée de la Sionne in Switzerland. Between winter seasons 2009/10 and 2014/15, data has been acquired from... Read More about GEODAR Data and the Flow Regimes of Snow Avalanches.

Comments on avalanche flow models based on the concept of random kinetic energy (2017)
Journal Article
Issler, D., Jenkins, J. T., & McElwaine, J. N. (2018). Comments on avalanche flow models based on the concept of random kinetic energy. Journal of Glaciology, 64(243), 148-164. https://doi.org/10.1017/jog.2017.62

In a series of papers, Bartelt and co-workers developed novel snow-avalanche models in which random kinetic energy (RKE) RK (a.k.a. granular temperature) is a key concept. The earliest models were for a single, constant density layer, using a Voellmy... Read More about Comments on avalanche flow models based on the concept of random kinetic energy.

Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water (2017)
Journal Article
Dundas, C. M., McEwen, A. S., Chojnacki, M., Milazzo, M. P., Byrne, S., McElwaine, J. N., & Urso, A. (2017). Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water. Nature Geoscience, 10, 903-907. https://doi.org/10.1038/s41561-017-0012-5

Recent liquid water flow on Mars has been proposed based on geomorphological features, such as gullies. Recurring slope lineae — seasonal flows that are darker than their surroundings — are candidate locations for seeping liquid water on Mars today,... Read More about Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water.

Experiments On Sublimating Carbon Dioxide Ice And Implications For Contemporary Surface Processes On Mars (2017)
Journal Article
Mc Keown, L., Bourke, M., & McElwaine, J. (2017). Experiments On Sublimating Carbon Dioxide Ice And Implications For Contemporary Surface Processes On Mars. Scientific Reports, 7(1), Article 14181. https://doi.org/10.1038/s41598-017-14132-2

Carbon dioxide is Mars’ primary atmospheric constituent and is an active driver of Martian surface evolution. CO2 ice sublimation mechanisms have been proposed for a host of features that form in the contemporary Martian climate. However, there has b... Read More about Experiments On Sublimating Carbon Dioxide Ice And Implications For Contemporary Surface Processes On Mars.

Lobate impact melt flows within the extended ejecta blanket of Pierazzo crater (2017)
Journal Article
Bray, V. J., Atwood-Stone, C., Neish, C. D., Artemieva, N. A., McEwen, A. S., & McElwaine, J. N. (2017). Lobate impact melt flows within the extended ejecta blanket of Pierazzo crater. Icarus, 301, 26-36. https://doi.org/10.1016/j.icarus.2017.10.002

Impact melt flows are observed within the continuous and discontinuous ejecta blanket of the 9 km lunar crater Pierazzo, from the crater rim to more than 40 km away from the center of the crater. Our mapping, fractal analysis, and thermal modeling su... Read More about Lobate impact melt flows within the extended ejecta blanket of Pierazzo crater.

On the Chemical Mixing Induced by Internal Gravity Waves (2017)
Journal Article
Rogers, T., & McElwaine, J. (2017). On the Chemical Mixing Induced by Internal Gravity Waves. Astrophysical Journal Letters, 848(1), Article L1. https://doi.org/10.3847/2041-8213/aa8d13

Detailed modeling of stellar evolution requires a better understanding of the (magneto)hydrodynamic processes that mix chemical elements and transport angular momentum. Understanding these processes is crucial if we are to accurately interpret observ... Read More about On the Chemical Mixing Induced by Internal Gravity Waves.

Analytical solution for clay plug swelling experiments (2017)
Journal Article
Mathias, S., Greenwell, H., Withers, C., Erdogan, A., McElwaine, J., & MacMinn, C. (2017). Analytical solution for clay plug swelling experiments. Applied Clay Science, 149, 75-78. https://doi.org/10.1016/j.clay.2017.07.021

Clay swelling experiments frequently involve monitoring the one-dimensional displacement with time of an initially dry clay plug as it imbibes water from a supply at its base. This article presents a new analytical solution for interpreting such expe... Read More about Analytical solution for clay plug swelling experiments.