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2 results for “Dirty ice”
Quantum mechanical modeling of the on-grain formation of acetaldehyde on H2O:CO dirty ice surfaces
<p>This Supporting Material contains:</p> <ul> <li>Cartesian coordinates of HF-3c optimized minima and transition state for the reaction in gas phase, in .xyz format, computed using <a href="https://gaussian.com/">Gaussian16</a> code;</li> <li>Fractional coordinates of HF-3c optimized minima and trasition state structures for crystalline periodic models in <a href="https://www.moldraw.unito.it/_sgg/m1m1s43_1.htm">.mol</a> format, editable with <a href="http://www.moldraw.unito.it/">MOLDRAW</a>, computed using <a href="http://www.crystal.unito.it/">CRYSTAL17</a> computer code.</li> </ul>
Data associated with 'Processes at the margins of supraglacial debris cover: quantifying dirty ice ablation and debris redistribution'
<p>Data associated with Fyffe, C. L., Woodget, A. S., Kirkbride, M. P., Deline, P., Westoby, M. J. and Brock, B. W. (2020) Processes at the margins of supraglacial debris cover: quantifying dirty ice ablation and debris redistribution, Earth Surface Processes and Landforms, doi:10.1002/esp.4879.</p> <p>The file All_quadrat_data_Z contains the data associated within each of the quadrats which were positioned on the ice surface. Some of the values are extracted from the UAV derived data within the area of the quadrat, while other data is based on measurements from the ground truth images (taken at ground level). The main data types are given below. The data sub-types and units are given in the file header.</p> <ul> <li>Quadrat: Quadrat name</li> <li>Elevation: Elevation from the UAV DEM</li> <li>Aspect: Aspect from the UAV DEM</li> <li>Ablation: Ablation derived from the UAV products (see the paper for details)</li> <li>Albedo: Measured albedo</li> <li>Rock_stats_image: Statistics on the clasts sampled from the ground truth image of the quadrat</li> <li>Debris_cover: Percentage debris cover derived from both the ground truth image (point) and UAV derived orthophotos</li> <li>Rock_stats_meas: Statistics on the clasts measured in the field</li> </ul> <p>The file Feature_Tracking_Data_Z contains data on clast movement, derived by locating the same clasts in the July and August orthophotos. The August orthophoto location was corrected for ice flow. The main data types are given below. The data sub-types and units are given in the file header.</p> <ul> <li>Coordinates: Locations of the points on the clasts in the July and August orthophotos</li> <li>Elevation: Elevation from the UAV derived DEMs</li> <li>Slope_from_slope_map: Slope from the UAV derived DEMs</li> <li>Surface: Either dirty ice (partial debris cover, or debris (continuous cover)</li> <li>Clast_length: A-axis length of the tracked clast</li> <li>Track_lines_stats: Characteristics of the line joining the clast locations</li> <li>Clast_velocity: Velocity of the tracked clast. Note the velocities derived from the distance measured over the surface were used for the analysis in the paper.</li> </ul> <p>The file Profiles_Data_Z contains the elevation and ablation data extracted following four cross-profiles which crossed the study area. Tables are also included giving the calculated moraine slope gradients and their change over time. The main data types are:</p> <ul> <li>Distance: The distance along the cross-section</li> <li>Elevation: The elevation from either the July or August DEM</li> <li>Ablation: The ablation value from the map of spatially continuous ablation.</li> </ul> <p>The folder GIS_Data_Z contains a range of GIS data associated with the paper. Included in the Zip file is an ArcMap document 'GIS_Data_Dirty_Ice' which includes all the data, along with a Word document ('Metadata for GIS data') which describes each of the files included within the ArcMap document. Briefly, the included data covers ground truth data (georeferenced ground truth photos, sample points and their classification, clast sizes, quadrat georeferencing information), clast track data (over the study area and the small scale clast tracks), stake data (measured and modelled ablation, calculated horizontal velocities and combined slope and emergence values), mapped ablation, percentage debris cover (and the difference in percentage cover), orthophotos, elevation data (and the cross-sections used to extract this) and the boundaries between the dirty and debris-covered ice. All data sets are in the WGS 1984 UTM Zone 32N coordinate system.</p> <p>The folder Percent_Debris_Analysis_H_Z contains the data used to derive Figure 5 (ablation and percentage debris cover data) in Matlab format (.mat file). It also includes the code used to make the figure. More details on file names will not be given here as the code documents the analysis steps.</p> <p>If any further information is required about the data then please get in contact with Catriona Fyffe.</p> <p> </p>
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