00000nam 2200000za 4500 9.846305 CaOODSP 20251031142447 cr ||||||||||| 171030s2017 oncabd ob f000 0 eng d CaOODSP eng n-cn-ab M183-2/8229E-PDF Demuth, Michael, 1960- Decadal-centenary glacier mass changes and their variability, Jasper National Park of Canada, Alberta, including the Columbia Icefield region [electronic resource] / M.N. Demuth and G. Horne. [Ottawa] : Natural Resources Canada, 2017. v, 25 p. : charts, ill. (some col.), maps. Open file ; 8229 This record only includes the Open File in PDF; the complete data set with all the files in various formats is available for free download at http://geoscan.nrcan.gc.ca/. Includes bibliographical references. “Geological Survey of Canada Open File 8229 presents an analysis of recently documented glacier volume and longitudinal profile changes to illustrate the decadal-centenary variability of mass change for a broad sample of study glaciers in Jasper National Park including those in the Columbia Icefield region. The results generally reflect large-scale regional glacier mass balance variability observed since the mid-20th century though, notably, the study glaciers are undergoing negative annual mass changes at a rate equal to or greater than thrice that of their long-term annualized centenary value (i.e., since c. 1841). While the general pattern of glacier mass loss since the mid-20th century appears to be influenced, in part, by shifts in the regime of the Pacific North American circulation pattern, it is noted that for the study glaciers and for other glaciers in southwestern Canada, the northwest Pacific and globally, mass change values over the last several decades and into early 21st century are exhibiting higher variability including several instances of record mass gains”--Summary, p. i. gccst Glaciers gccst Measurement gccst Climate change Jasper National Park (Alta.) Columbia Icefield (B.C. and Alta.) Horne, Greg. Canada. Natural Resources Canada. Geological Survey of Canada. Open file (Geological Survey of Canada) 8229. (CaOODSP)9.506878 PDF 2.24 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-2/M183-2-8229-eng.pdf HTML N/A https://doi.org/10.4095/304236 304236