00000nem 2200000za 4500 9.572737 CaOODSP 20230131161133 m go c f cr ||||||||||| 150406s2012 onc bd a fo 0 eng d 978-1-100-19879-8 CaOODSP eng eng fre n-cn-nu M183-1/67-2011E-PDF Seasonal surface displacement derived from InSAR, Pangnirtung, Nunavut [electronic resource] / [by] N. Short ... [et al.]. Preliminary version Scale 1:5,000 Ottawa : Natural Resources Canada, c2012. 1 map : col. Canadian geoscience map ; No. 67 Includes a legend. Includes bibliographical references. "This map shows the spatial distribution of the relative ground surface displacement between the major terrain units during one summer in the area of Pangnirtung. The ground displacement was derived using interferometric synthetic aperture radar (InSAR) data for the summer of 2011. Stable ground represents locations where either no vertical change was calculated or where displacement was within the expected range of error (± 0.5 cm). Very low, low, moderate, and high downward displacement represents surface lowering on the order of 0.5 to 2, 2 to 4.5, 4.5 to 8.5, and 8.5 to 10 cm, respectively. Upward displacement represents a surface rise of 0.5 to 3 cm. Areas of no data result from a loss of interferometric coherence. These are typically water and other relatively smooth surfaces from which there is no radar return, or where there has been significant ground surface disturbance and the radar returns cannot be correlated. The InSAR results correspond well with the expected displacement associated with the characteristics of the major terrain units. The displacement reflects seasonal settlement caused by thawing of ice in the active layer or in the near-surface permafrost"--Abstract. Includes abstract in French. 13-41 2013-10-11 gccst Geological maps gccst Geomorphology gccst Permafrost Short, N. H., 1975- Canada. Natural Resources Canada. Geological Survey of Canada. Canadian geoscience map ; No. 67. (CaOODSP)9.506260 PDF 9.39 MB https://publications.gc.ca/collections/collection_2013/rncan-nrcan/M183-1-67-2011-eng.pdf HTML N/A https://doi.org/10.4095/289607 289607