BOREAS HYD-03 SNOW TEMPERATURE PROFILES

1999 ◽  
Author(s):  
R. E. DAVIS
Keyword(s):  
Temperature Profiles ◽  
Snow Temperature

scholarly journals Field observation and modelling of weak-layer evolution

1998 ◽  
Vol 26 ◽  
pp. 7-13 ◽  
Author(s):  
Charles Fierz
Keyword(s):  
Temperature Profiles ◽  
Crucial Importance ◽  
Near Surface ◽  
Weak Layer ◽  
Federal Institute ◽  
Before And After ◽  
Thin Crust ◽  
Shear Frame ◽  
Snow Temperature

For operational snow-cover simulations, an adequate modelling of the evolution of buried weak layers is of crucial importance. Therefore, the processes governing snow metamorphism within weak layers before and after burial must be known in detail. At the study site of the Swiss Federal Institute for Snow and Avalanche Research, 2540 ma.s.l., a 2 cm thick weak layer of column-grown cup-shaped crystals formed beneath a thin crust in mid-January 1996. Exposed to near-surface processes for about 4 weeks, the layer was buried on 8 February and persisted in the snowpack until mid-April. Numerous temperature profiles and characterizations of both the weak and the adjacent layers were performed in situ. Snow-grain samples, as well as larger snow blocks, were taken to the cold laboratory for further analysis of the texture. The shear strength of the buried weak layer was also investigated by means of shear-frame tests. The field observations and measurements are compared with model simulations of snow temperature and stratigraphy. The comparison shows potential and problems in the modelling of weak-layer evolution.

scholarly journals A new snow thermodynamic scheme for large-scale sea-ice models

2011 ◽  
Vol 52 (57) ◽  
pp. 337-346 ◽  
Author(s):  
Olivier Lecomte ◽  
Thierry Fichefet ◽  
Martin Vancoppenolle ◽  
Marcel Nicolaus
Keyword(s):  
Sea Ice ◽  
Large Scale ◽  
Weddell Sea ◽  
Temperature Profiles ◽  
Sea Ice Thickness ◽  
One Dimensional ◽  
Snow Stratigraphy ◽  
Set Up ◽  
Snow Temperature ◽  
Ice Model

AbstractThis paper assesses the capabilities of a new one-dimensional snow scheme developed for the thermodynamic component of the Louvain-la-Neuve sea-Ice Model (LIM). the model is validated at Point Barrow, Alaska, and at Ice Station Polarstern (ISPOL) in the western Weddell Sea, Southern Ocean. the new snow thermodynamic scheme leads to better snow internal temperature profiles, with a set-up-dependent increase in the correlation between simulated and observed temperature profiles. on average over all runs, these correlations are 27% better with the six-layer configuration. the model’s ability to reproduce observed temperatures improves with the number of snow layers, but stabilizes after a threshold layer number is reached. the lowest and highest values for this threshold are 3 (at Point Barrow) and 6 (at ISPOL), respectively. Overall, the improvement of the model’s ability to simulate sea-ice thickness is not as significant as for snow temperature, probably because of the rather crude representation of the snow stratigraphy in the model.

scholarly journals Crocus test results for snowpack modeling in two snow climates with respect to avalanche forecasting

1998 ◽  
Vol 26 ◽  
pp. 347-356 ◽  
Author(s):  
Laurent Mingo ◽  
D. M. Mcclung
Keyword(s):  
Snow Depth ◽  
Meteorological Data ◽  
Liquid Water Content ◽  
Temperature Profiles ◽  
Test Results ◽  
Density Profiles ◽  
Climate Zones ◽  
Avalanche Forecasting ◽  
Present Information ◽  
Snow Temperature

Overall results comparing field observations andCrocussimulations during the winters 1993–94 and 1994–95 in two different climate zones are presented. We present information on: snow depth, snow-temperature profiles, density profiles, liquid-water content profiles and grain metamorphism. Snow profiles illustrating the typical behavior of the model are presented and are shown to illustrate the sensitivity ofCrocusto different mountain climates. Heat-exchange simulation, together with qualitative analysis of meteorological data, give promising results for surface-hoar prediction.

scholarly journals Crocus test results for snowpack modeling in two snow climates with respect to avalanche forecasting

1998 ◽  
Vol 26 ◽  
pp. 347-356 ◽  
Author(s):  
Laurent Mingo ◽  
D. M. Mcclung
Keyword(s):  
Snow Depth ◽  
Meteorological Data ◽  
Liquid Water Content ◽  
Temperature Profiles ◽  
Test Results ◽  
Density Profiles ◽  
Climate Zones ◽  
Avalanche Forecasting ◽  
Present Information ◽  
Snow Temperature

Overall results comparing field observations and Crocus simulations during the winters 1993–94 and 1994–95 in two different climate zones are presented. We present information on: snow depth, snow-temperature profiles, density profiles, liquid-water content profiles and grain metamorphism. Snow profiles illustrating the typical behavior of the model are presented and are shown to illustrate the sensitivity of Crocus to different mountain climates. Heat-exchange simulation, together with qualitative analysis of meteorological data, give promising results for surface-hoar prediction.

scholarly journals Field observation and modelling of weak-layer evolution

1998 ◽  
Vol 26 ◽  
pp. 7-13 ◽  
Author(s):  
Charles Fierz
Keyword(s):  
Temperature Profiles ◽  
Crucial Importance ◽  
Near Surface ◽  
Weak Layer ◽  
Federal Institute ◽  
Before And After ◽  
Thin Crust ◽  
Shear Frame ◽  
Snow Temperature

For operational snow-cover simulations, an adequate modelling of the evolution of buried weak layers is of crucial importance. Therefore, the processes governing snow metamorphism within weak layers before and after burial must be known in detail. At the study site of the Swiss Federal Institute for Snow and Avalanche Research, 2540 ma.s.l., a 2 cm thick weak layer of column-grown cup-shaped crystals formed beneath a thin crust in mid-January 1996. Exposed to near-surface processes for about 4 weeks, the layer was buried on 8 February and persisted in the snowpack until mid-April. Numerous temperature profiles and characterizations of both the weak and the adjacent layers were performed in situ. Snow-grain samples, as well as larger snow blocks, were taken to the cold laboratory for further analysis of the texture. The shear strength of the buried weak layer was also investigated by means of shear-frame tests. The field observations and measurements are compared with model simulations of snow temperature and stratigraphy. The comparison shows potential and problems in the modelling of weak-layer evolution.

scholarly journals Preliminary Results of the Glaciological Work on the Trans-Antarctic Expedition, 1955–58

1959 ◽  
Vol 3 (25) ◽  
pp. 426-431 ◽  
Author(s):  
P. J. Stephenson ◽  
H. Lister
Keyword(s):  
Wind Speed ◽  
Wind Direction ◽  
Crystal Size ◽  
Radiation Flux ◽  
Temperature Profiles ◽  
Drifting Snow ◽  
Antarctic Expedition ◽  
The Mean ◽  
Snow Temperature ◽  
Surface Observations

Abstract At the inland station “Southice” (at approximately lat. 82° S., long. 29° W.) investigation in firn to 45m. included profiles of temperature, density, granularity and crystal size. Mean annual accumulation and temperature are interpolated and crystal fabric analyses briefly discussed. A study of drifting snow is outlined. Similar studies, but without crystal observations, were continued across the continent using snow cores to 11 m. depth and supplemented by Rammsonde soundings. These sub-surface observations with the sastrugi forms noted, permit the interpolation of the mean accumulation, temperature and wind direction at different heights across the continent. Radiation flux, wind speed and air and snow temperature profiles were recorded at various halts.

scholarly journals Preliminary Results of the Glaciological Work on the Trans-Antarctic Expedition, 1955–58

1959 ◽  
Vol 3 (25) ◽  
pp. 426-431
Author(s):  
P. J. Stephenson ◽  
H. Lister
Keyword(s):  
Wind Speed ◽  
Wind Direction ◽  
Crystal Size ◽  
Radiation Flux ◽  
Temperature Profiles ◽  
Drifting Snow ◽  
Antarctic Expedition ◽  
The Mean ◽  
Snow Temperature ◽  
Surface Observations

AbstractAt the inland station “Southice” (at approximately lat. 82° S., long. 29° W.) investigation in firn to 45m. included profiles of temperature, density, granularity and crystal size. Mean annual accumulation and temperature are interpolated and crystal fabric analyses briefly discussed. A study of drifting snow is outlined.Similar studies, but without crystal observations, were continued across the continent using snow cores to 11 m. depth and supplemented by Rammsonde soundings. These sub-surface observations with the sastrugi forms noted, permit the interpolation of the mean accumulation, temperature and wind direction at different heights across the continent. Radiation flux, wind speed and air and snow temperature profiles were recorded at various halts.

Sign in / Sign up

Export Citation Format

Share Document