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Title |
On the energy budget of a low-Arctic snowpack |
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Journal |
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Year |
2022 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
16 |
Issue |
1 |
Pages |
127-142 |
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Abstract |
Arctic landscapes are covered in snow for at least 6 months of the year. The energy balance of the snow cover plays a key role in these environments, influencing the surface albedo, the thermal regime of the permafrost, and other factors. Our goal is to quantify all major heat fluxes above, within, and below a low-Arctic snowpack at a shrub tundra site on the east coast of Hudson Bay in eastern Canada. The study is based on observations from a flux tower that uses the eddy covariance approach and from profiles of temperature and thermal conductivity in the snow and soil. Additionally, we compared the observations with simulations produced using the Crocus snow model. We found that radiative losses due to negative longwave radiation are mostly counterbalanced by the sensible heat flux, whereas the latent heat flux is minimal. At the snow surface, the heat flux into the snow is similar in magnitude to the sensible heat flux. Because the snow cover stores very little heat, the majority of the upward heat flux in the snow is used to cool the soil. Overall, the model was able to reproduce the observed energy balance, but due to the effects of atmospheric stratification, it showed some deficiencies when simulating turbulent heat fluxes at an hourly timescale. |
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1042 |
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1994-0416 |
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yes |
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Serial |
8408 |
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Author |
Dominic Saunderson, Andrew Mackintosh, Felicity McCormack, Richard Selwyn Jones, Ghislain Picard |
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Journal |
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Year |
2022 |
Publication |
The Cryosphere Discussions |
Abbreviated Journal |
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Pages |
1-26 |
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1110 |
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1994-0416 |
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yes |
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Serial |
8420 |
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Author |
Ghislain Picard, Marion Leduc-Leballeur, Alison F. Banwell, Ludovic Brucker, Giovanni Macelloni |
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Title |
The sensitivity of satellite microwave observations to liquid water in the Antarctic snowpack |
Type |
Journal |
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Year |
2022 |
Publication |
The Cryosphere Discussions |
Abbreviated Journal |
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Issue |
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Pages |
1-34 |
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1110 |
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1994-0416 |
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yes |
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8443 |
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Title |
Metamorphism of snow on Arctic sea ice during the melt season: impact on spectral albedo and radiative fluxes through snow |
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Journal |
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Year |
2022 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
16 |
Issue |
9 |
Pages |
3431-3449 |
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1042 |
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1994-0416 |
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yes |
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Call Number |
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Serial |
8577 |
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Author |
Georg Lackner, Florent Domine, Daniel F. Nadeau, Matthieu Lafaysse, Marie Dumont |
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Journal |
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Year |
2022 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
16 |
Issue |
8 |
Pages |
3357-3373 |
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1042 |
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1994-0416 |
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Approved |
yes |
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Call Number |
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Serial |
8588 |
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Author |
Ghislain Picard, Marion Leduc-Leballeur, Alison F. Banwell, Ludovic Brucker, Giovanni Macelloni |
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Title |
The sensitivity of satellite microwave observations to liquid water in the Antarctic snowpack |
Type |
Journal |
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Year |
2022 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
16 |
Issue |
12 |
Pages |
5061-5083 |
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Abstract |
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Programme |
1110 |
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ISSN |
1994-0416 |
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yes |
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Call Number |
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Serial |
8595 |
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Author |
Sara Arioli, Ghislain Picard, Laurent Arnaud, Vincent Favier |
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Title |
Dynamics of the snow grain size in a windy coastal area of Antarctica from continuous in situ spectral-albedo measurements |
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Journal |
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Year |
2023 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
17 |
Issue |
6 |
Pages |
2323-2342 |
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Abstract |
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1110 |
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ISSN |
1994-0416 |
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Approved |
yes |
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Call Number |
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Serial |
8627 |
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Author |
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Journal |
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Year |
2023 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
17 |
Issue |
12 |
Pages |
5241-5254 |
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Programme |
1110,1205 |
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Thesis |
Bachelor's thesis |
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ISSN |
1994-0416 |
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yes |
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Call Number |
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Serial |
8699 |
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Author |
Picard G, Brucker L, Roy A, Dupont F, Fily M, Royer A, |
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Title |
Simulation of the microwave emission of multi-layered snowpacks using the dense media radiative transfer theory: the DMRT-ML model
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Type |
Journal Article |
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Year |
2012 |
Publication |
Geoscientific Model Development Discussions |
Abbreviated Journal |
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Volume |
5 |
Issue |
4 |
Pages |
3647-3694 |
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Abstract |
DMRT-ML is a physically-based numerical model designed to compute the thermal microwave emission of a given snowpack. Its main application is the simulation of brightness temperatures at frequencies in the range 1-200 GHz similar to those acquired routinely by space-based microwave radiometers. The model is based on the Dense Media Radiative Transfer (DMRT) theory for the computation of the snow scattering and extinction coefficients and on the Discrete Ordinate Method (DISORT) to numerically solve the radiative transfer equation. The snowpack is modeled as a stack of multiple horizontal snow layers and an optional underlying interface representing the soil or the bottom ice. The model handles both dry and wet snow conditions. Such a general design allows the user to account for a wide range of snow conditions. Hitherto, the model has been used to simulate the thermal emission of the deep firn on ice sheets, shallow snowpacks overlying soil in Arctic and Alpine regions, and overlying ice on the large ice-sheet margins and glaciers. DMRT-ML has thus been validated in three very different conditions: Antarctica, Barnes Ice Cap (Canada) and Canadian tundra. It has been recently used in conjunction with inverse methods to retrieve snow grain size from remote sensing data. The model is written in Fortran90 and available to the snow remote sensing community as an open-source software. |
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1073 |
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Bachelor's thesis |
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1991-962X |
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Serial |
3968 |
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Author |
O'Connor, F.M., C.E. Johnson, O. Morgenstern, N.L. Abraham, P. Braesicke, M. Dalvi, G.A. Folberth, M.G. Sanderson, P.J. Telford, A. Voulgarakis, P.J. Young, G. Zeng, W.J. Collins, and J.A. Pyle |
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Title |
Evaluation of the new UKCA climate-composition model – Part 2: The Troposphere |
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Journal Article |
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Year |
2014 |
Publication |
Geosci. Model Dev. |
Abbreviated Journal |
GMD |
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Volume |
7 |
Issue |
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Pages |
41-91 |
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Programme |
416 |
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ISSN |
1991-962X |
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Call Number |
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Serial |
5346 |
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