Cirque-like alcoves in the northern mid-latitudes of Mars as evidence of glacial erosion
Li, An; Koutnik, Michelle; Brough, Stephen; Spagnolo, Matteo; Barr, Iestyn
- Publisher
- Zenodo
- Language
- en
Abstract
These data are for the manuscript "Cirque-like alcoves in the northern mid-latitudes of Mars as evidence of glacial erosion." They incude the shapefile and spreadsheet of the 434 cirque-like alcoves identified in Deuteronilus Mensae, Mars. There is also a corresponding table that explains each of the columns in the dataset. The High Resolution Stereo Camera (HRSC) (Neukum et al., 2004) digital elevation model (DEM) mosaicked from 29 frames is also included. The 29 Level 4 HRSC data frames that were used include: h5436_0000_da4, h5418_0000_da4, h5400_0000_da4, h5364_0000_da4, h5339_0000_da4, h5328_0000_da4, h5321_0000_da4, h5310_0000_da4, h5303_0000_da4, h5285_0000_da4, h5267_0000_da4, h5249_0000_da4, h5231_0000_da4, h5213_0000_da4, h3304_0000_da4, h3293_0000_da4, h3249_0000_da4, h3183_0000_da4, h2191_0000_da4, h1644_0000_da4, h1622_0000_da4, h1571_0000_da4, h1289_0000_da4, h1395_0000_da4, h1461_0000_da4, h1450_0000_da4, h1428_0000_da4, h1483_0000_da4, and h1201_0000_da4. The Level 4 HRSC data frames can be accessed at the ESA Planetary Science Archive: http://www.rssd.esa.int/index.php?project=PSA, HRSCview by FU Berlin/DLR: http://hrscview.fu-berlin.de/, or the NASA Planetary Data Science (PDS) http://pds-geosciences.wustl.edu/missions/mars_express/.
Full text
Table corresponding to cirque-like alcove dataset and spreadsheet: Parameters correspond to columns in the cirque-like alcoves shapefile and spreadsheet with their corresponding descriptions. Parameter Description Unit OBJECTID Unique ID for each cirque-like alcove entry lda_lvf_ov Overlap with LDA or LVF of Levy et al. (2014), 1 = yes, 0 = no. Lat Longitude coordinate in decimal degrees o Long Latitude coordinate in decimal degrees o Type Classified type (all 1 for cirque-like alcoves) L Length of median axis of cirque-like alcove m W Maximum, at right angles to axis, through cirque centroid m L/W Length over width ratio of cirque-like alcove Perimeter Perimeter of cirque-like alcove km A_2D 2D (map) area as defined in Li et al. (2024) km2 A_3D 3D (surface) area as defined in Li et al. (2024) km2 Circular Circularity index, defined in Li et al. (2024) DEMresolut DEM resolution m Easting Easting (x coordinate) of the cirque centroid point km Northing Northing (y coordinate) of the cirque centroid point km H Height: Z_max-Z_min m CS Cirque-like alcove size: the cubic root of L×W×H m L_H L/H ratio L_W L/W ratio A3D_A2D 3D area/2D area ratio Slope_mean Mean slope of cirque-like alcove o Slope_max Maximum slope of cirque-like alcove o Slope_min Minimum slope of cirque-like alcove o
H_W H/W ratio Slpgt33 Percentage of area with steep slopes of >33° Slplt20 Percentage of the area with gentle slopes of <20° Slp20to33 Percentage of the area with slopes between 20° and 33° Aspectmean Vector mean aspect of all points within the cirque-like alcove o Aps_east Sine value of Aspectmean Asp_north Cosine value of Aspectmean Z_min Minimum elevation cirque-like alcove m Z_max Maximum elevation of cirque-like alcove m Z_median Median elevation of cirque-like alcove m Z_mean Mean elevation of cirque-like alcove m Z_mid Middle elevation of the cirque-like alcove: (Z_max+Z_min)/2 m Hypsomax Highest mode of cirque-like alcove elevations m HI Hypsometric integral. Prof_clos Difference between maximum and minimum slope within the cirque-like alcove o Type 1 for all simple alcoves. Synonymous with “alcove class” used in Appendix B in the corresponding paper. SubCat Sub-category notes while mapping, not used in analyses: a-boulders, blayers in mesa, c-lineations/streaks, d-slumping debris, e-ridge-like features, f-unclear debris, g-glacier-like form nearby/neighbor, h-dunes, i-scalloped terrain, j-bumpy texture terrain, k-paintbrush-like headwall, l-rubbly, m-pasted-on terrain, n-flow features, o-alcove doesn’t reach top of mesa, q-crusty texture, p-transverse ridges, r-layered deposits, smoraines, t-polygonal terrain Reference Li, Y., Evans, I. S., Spagnolo, M., Pellitero, R., Barr, I. D., & Ely, J. C. ACME2: An extended toolbox for automated cirque metrics extraction. Geomorphology, 445, 108982, 2024.
