Mapped polygon pattern geomorphometry from HRSC-AX, 2009, Adventdalen, Svalbard

• Main Authors: Ulrich, Mathias, Härtel, Stefanie, Hauber, Ernst
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2020
• Subjects: Ice-wedge Polygons; Multivariate Statistic; Patterned Ground; permafrost; Permafrost Characteristic; Polygonal Networks; Quantitative Terrain Analysis; Event label; Latitude of event; Longitude of event; File content; Binary Object; Binary Object File Size; High Resolution Stereo Camera HRSC-AX; NO_Land_2009_Advendalen; AWI Arctic Land Expedition; Adventdalen; Arctic; Svalbard; Active layer monitoring; Ice; wedge*
• Online Access: https://dx.doi.org/10.1594/pangaea.921087; https://doi.pangaea.de/10.1594/PANGAEA.921087

Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is controlled by various environmental factors and determines dimension, shape, and orientation of polygons. We studied the geomorphometry of polygonally-patterned ground on Svalbard to draw a terrestrial analogy to small-scale polygonal structures on Mars. We performed a comparative quantitative terrain analysis based on high-resolution stereo remote-sensing data (i.e., HRSC-AX, HiRISE) in combination with terrestrial field data and multivariate statistics to determine the relationship of polygon geomorphometry to local environmental conditions. Results show that polygonal structures on Svalbard and in Utopia Planitia, Mars, are similar with respect to their size and shape. A comparable thermal contraction cracking genesis is likely. Polygon evolution, however, is strongly related to regional and local landscape dynamics. Individual polygon dimensions and orthogonality vary according to age, thermal contraction cracking activity, and local subsurface conditions.This dataset contains polygonal network data from 8 sites on Svalbard in shapefile format:Act-IWS = Active Ice-Wedge site Adventdalen (AD1)AD2 to AD4 = Adventdalen sites 2 to 4IWS = Ice-wedge site AdventdalenCALM = Circumarctic Active-Layer Monitoring polygon site AdventdalenHCP = High Center Polygons site AdventdalenIsdammen = location Isdammen site AdventdalenDetailed information about methods and results can be found in the publication to which this dataset is a supplement (https://doi.org/10.1016/j.geomorph.2011.07.002). : Parameters included:area: area (A) [m²]perimeter: perimeter (P) [m]length: Length (L) largest diameter [m]width: Width (W) smallest diameter [m]thick_ra: Thickness ratio (Th) (The polygon area versus the area of its minimum bounding rectangle) [0 to 1]circular: Circularity (FF) = 4πA/P² [0 to 1]