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Data Publisher for Earth & Environmental Science

Hagenmuller, Pascal; Flin, Frederic; Dumont, Marie; Tuzet, François; Peinke, Isabel; Lapalus, Philippe; Dufour, Anne; Roulle, Jacques; Pezard, Laurent; Voisin, Didier; Ando, Edward; Rolland du Roscoat, Sabine; Charrier, Pascal (2019): Dust motion in snow microstructure. PANGAEA, https://doi.org/10.1594/PANGAEA.904568, Supplement to: Hagenmuller, P et al. (2019): Motion of dust particles in dry snow under temperature gradient metamorphism. The Cryosphere, 13(9), 2345-2359, https://doi.org/10.5194/tc-13-2345-2019

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Abstract:
The deposition of light-absorbing particles (LAPs) such as mineral dust and black carbon on snow is responsible for a highly effective climate forcing, through darkening of the snow surface and associated feedbacks. The interplay between post-depositional snow transformation (metamorphism) and the dynamics of LAPs in snow remains largely unknown. We obtained time series of X-ray tomography images of dust-contaminated samples undergoing dry snow metamorphism around -2°C. They provide the first observational evidence that temperature gradient metamorphism induces dust particle motion in snow, while no movement is observed under isothermal conditions. Under temperature gradient metamorphism, dust particles can enter the ice matrix due to sublimation-condensation processes and spread down mainly by falling into the pore space. Overall, such motions might reduce the radiative impact of dust in snow, in particular in arctic regions where temperature gradient metamorphism prevails.
Details on the data can be found in the associated paper (Hagenmuller et al., 2019).
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The dataset contains:
- 1_3D_Microstructure/Sample_[XX]_t_[YY]h.mhd : segmented 3D image of the snow and dust microstructure of sample XX (ISO: sample undergoing isothermal metamorphism, TG: sample undergoing temperature-gradient metamorphism) at different times YY from the experiment start. Image format according to: https://itk.org/Wiki/ITK/MetaIO/Documentation. See Fig. 1 in the associated paper.
- 2_Microstructural_Evolution_Sample_[XX].txt : ASCII file describing the time evolution of the density, specific surface area and anisotropy of sample XX. See Fig. 2 in the associated paper.
- 3_Ice-Dust_Contact_Distribution_Sample_[XX].txt: ASCII file describing the distribution of the ice-dust contact of sample XX at different times. See Fig. 3 in the associated paper.
- 3_Ice-Dust_Contact_Evolution_Sample_[XX].txt: ASCII file describing the time evolution of the ice-dust contact area of sample XX. See Fig. 3 in the associated paper.
- 4_Vertical_Displacement_Evolution_Sample_[XX].txt : ASCII file describing the time evolution of the vertical position of dust particles and ice for sample XX. See Fig. 4 in the associated paper.
- 4_Vertical_Speed_Distribution_Sample_[XX].txt : ASCII file describing the distribution of the vertical speed of dust particles and ice for sample XX at different times. See Fig. 4 in the associated paper.
- 5_Vertical_Speed_AsAFunctionOf_Ice-Dust_Contact_Sample_TG.txt : ASCII file describing the vertical speed of dust particles as a function of the ice-dust contact for sample TG. See Fig. 5 in the associated paper.
- 6_Vertical_Speed_AsAFunctionOf_Particle_Size_Sample_TG.txt : ASCII file describing the vertical speed of dust particles as a function of particle size for sample TG. See Fig. A3 in the associated paper.
Keyword(s):
dust; light-absorbing particles; metamorphism; microstructure; snow
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
File contentContentHagenmuller, Pascal
File nameFile nameHagenmuller, Pascal
File formatFile formatHagenmuller, Pascal
File sizeFile sizekByteHagenmuller, Pascal
Uniform resource locator/link to fileURL fileHagenmuller, Pascal
Size:
65 data points

Data

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Content

File name

File format

File size [kByte]

URL file
segmented 3D image of the snow and dust microstructure1_3D_Microstructure.raw/.mhd14707.3191_3D_Microstructure.zip
ASCII file describing the time evolution of the density, specific surface area and anisotropy of sample ISO2_Microstructural_Evolution_Sample_ISOtxt0.6182_Microstructural_Evolution_Sample_ISO.zip
ASCII file describing the time evolution of the density, specific surface area and anisotropy of sample TG2_Microstructural_Evolution_Sample_TGtxt1.1062_Microstructural_Evolution_Sample_TG.zip
ASCII file describing the distribution of the ice-dust contact of sample ISO at different times3_Ice-Dust_Contact_Distribution_Sample_ISOtxt1.1423_Ice-Dust_Contact_Distribution_Sample_ISO.zip
ASCII file describing the distribution of the ice-dust contact of sample TG at different times3_Ice-Dust_Contact_Distribution_Sample_TGtxt1.1253_Ice-Dust_Contact_Distribution_Sample_TG.zip
ASCII file describing the time evolution of the ice-dust contact area of sample ISO3_Ice-Dust_Contact_Evolution_Sample_ISOtxt0.4943_Ice-Dust_Contact_Evolution_Sample_ISO.zip
ASCII file describing the time evolution of the ice-dust contact area of sample TG3_Ice-Dust_Contact_Evolution_Sample_TGtxt0.7713_Ice-Dust_Contact_Evolution_Sample_TG.zip
ASCII file describing the time evolution of the vertical position of dust particles and ice for sample ISO4_Vertical_Displacement_Evolution_Sample_ISOtxt0.7484_Vertical_Displacement_Evolution_Sample_ISO.zip
ASCII file describing the time evolution of the vertical position of dust particles and ice for sample TG4_Vertical_Displacement_Evolution_Sample_TGtxt1.4004_Vertical_Displacement_Evolution_Sample_TG.zip
ASCII file describing the distribution of the vertical speed of dust particles and ice for sample ISO at different times4_Vertical_Speed_Distribution_Sample_ISOtxt1.8364_Vertical_Speed_Distribution_Sample_ISO.zip
ASCII file describing the distribution of the vertical speed of dust particles and ice for sample TG at different times4_Vertical_Speed_Distribution_Sample_TGtxt1.9894_Vertical_Speed_Distribution_Sample_TG.zip
ASCII file describing the vertical speed of dust particles as a function of the ice-dust contact for sample TG5_Vertical_Speed_AsAFunctionOf_Ice-Dust_Contact_Sample_TGtxt3.1705_Vertical_Speed_AsAFunctionOf_Ice-Dust_Contact_Sample_TG.zip
ASCII file describing the vertical speed of dust particles as a function of particle size for sample TG6_Vertical_Speed_AsAFunctionOf_Particle_Size_Sample_TGtxt3.3036_Vertical_Speed_AsAFunctionOf_Particle_Size_Sample_TG.zip