On measuring glacier surface roughness under quasi-stationary flow conditions: support for the Andreas model from the Peyto Glacier.

On measuring glacier surface roughness under quasi-stationary flow conditions: support for the Andreas model from the Peyto Glacier. | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Hydrological Processes This is a preprint and has not been peer reviewed. Data may be preliminary. 7 April 2025 V1 Latest version Share on On measuring glacier surface roughness under quasi-stationary flow conditions: support for the Andreas model from the Peyto Glacier. Author : Scott Munro 0009-0008-1771-6722 [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.174404435.58917000/v1 195 views 103 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Microtopographic and eddy correlation data sets were obtained to measure the aerodynamic roughness length, z 0u , the latter also used to measure the thermal roughness length, z 0T . Microtopographic data from 70 measurement samples yielded a mean z 0u value of 2.78 mm. Attempts to acquire as many half-hourly measurement samples from five-minute block means of eddy correlation data were frustrated by quasi-stationary flow conditions. Nevertheless, 14 samples from one eddy correlation sensor and 12 more from another yielded respective mean z 0u values of 2.70 and 2.83 mm, as well as z 0T samples. Plots of half-hourly mean ln( z 0T /z 0u ) against the natural logarithms of the roughness Reynolds number appear to straddle the line of the Andreas surface renewal model, an observation that is reinforced when the stationarity selection criterion is relaxed to increase the number of points plotted. Due to vertical flux divergence, accurate roughness measurements could not be made in a katabatic wind regime, where the Obukhov length is an order of magnitude smaller than it is in a geostrophic wind regime. Supplementary Material File (ottawacgupaper.docx) Download 1.84 MB Information & Authors Information Version history V1 Version 1 07 April 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Collection Hydrological Processes Keywords andreas model eddy correlation ice roughness lengths katabatic wind obukhov length Authors Affiliations Scott Munro 0009-0008-1771-6722 [email protected] University of Toronto Department of Geography & Planning View all articles by this author Metrics & Citations Metrics Article Usage 195 views 103 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Scott Munro. On measuring glacier surface roughness under quasi-stationary flow conditions: support for the Andreas model from the Peyto Glacier.. Authorea . 07 April 2025. DOI: https://doi.org/10.22541/au.174404435.58917000/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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