4bf5727c-d5be-4c9c-a16a-bb3b0b43a9c0 Spatineo Inc. +358 20 703 2210 Kellosilta 2 D Helsinki FI-00520 Finland info@spatineo.com 2021-03-01T00:11:48Z ISO 19115:2003/19139 1.0 WMS 2019-12-03T08:53:22Z 2018-09-25T09:57:25Z 1 <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN>The dataset time series presented by this web service corresponds to daily (subsampled to a monthly interval) snow cover percentage at 1km resolution grid over land areas of Canada from 2006-2010. The data are subsampled by 4km to reduce data volumes and considering the geolocation uncertainty of the input satellite imagery. The daily maps are generated by assimilation of daily cloud screened NOAA AVHRR satellite imagery and Canadian Meteorological Centre (CMC) snow depth analysis snow depth and density fields within an off-line version of the CMC daily snow depth model. The snow depth model is modified to include snowpack reflectance model and a surface radiative transfer scheme that relates vegetation and snowpack reflectance to top-of-canopy bi-directional reflectance. A logistic vegetation phenology model is used to parameterize temporal dynamics of canopy leaf area index. A per-pixel particle filter with a 30 day moving window is applied to assimilation observations corresponding to 1km resolution visible band directional reflectance and normalized difference vegetation index and 24km CMC daily snow depth and monthly snow density fields. The assimilation is forced using daily air temperature and precipitation fields. Validation of the datasets has been performed by comparison to MODIS snow cover maps and in-situ snow depth stations across Canada. Validation suggests similar accuracy to MODIS snow cover products over relatively flat terrain.</SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>The source data is accessible at </SPAN></SPAN><A href="https://neodf.nrcan.gc.ca/neodf_cat3/"><SPAN><SPAN>https://neodf.nrcan.gc.ca/neodf_cat3/</SPAN></SPAN></A></P><P><SPAN /></P></DIV></DIV></DIV> Government of Canada; Natural Resources Canada 1 (800) 661 2638 NRCan.fgp-pgf.RNCan@Canada.ca Snow cover,AVHRR,Canada Arctic Rating OGC:WMS 1.3.0 Licence du gouvernement ouvert - Canada (http://ouvert.canada.ca/fr/licence-du-gouvernement-ouvert-canada) ASDD nodes zserver z3950://www.google.com:6668/geonetwork z3950 ASDD Z3950 zserver http://webservices.maps.canada.ca/arcgis/services/NRCan/AVHRR_snowcover_2006_2010_en/ImageServer/WMSServer?SERVICE=WMS&REQUEST=GetCapabilities http://directory.spatineo.com/service/89435 WWW:LINK-1.0-http--link Service in Spatineo Directory