Probability of the annual minimum snow and ice (MSI) presence over Canada

Probability of the annual minimum snow and ice (MSI) presence over Canada Snow and ice are important hydrological resources. Their minimum spatial extent here referred to as annual minimum snow/ice (MSI) cover, plays a very important role as an indicator of long-term changes and baseline capacity for surface water storage. The MSI probability is derived from sequence of seventeen 10-day clear-sky composites corresponding to April, 1 to September, 20 warm period for each year since 2000. Data from Moderate Resolution Imaging Spectroradiometer (MODIS) on Terra satellite for the period since 2000 have been processed with the special technology developed at the Canada Centre for Remote Sensing (CCRS) as described in Trishchenko, 2016; Trishchenko et al., 2016; 2009, 2006, Khlopenkov and Trishchenko, 2008, Luo et al., 2008. The presence of snow or ice is determined for each pixel of the image based on snow/ice scene identification procedure and the probability if computed for the entire warm season as a ratio of number of snow/ice flags to the total number of pixels available (=< 17). The minimum snow and ice extent can be derived from the probability map by applying a certain threshold. References: TRICHTCHENKO, A.P., 2016: Probability maps of the annual minimum snow and ice (MSI) presence over April,1 to September, 20 period since 2000 derived from MODIS 250m imagery over Canada and neighbouring regions. Data format description. CCRS, NRCan. 4pp. 2021-05-19 Natural Resources Canada alexander.trichtchenko@canada.ca Nature and EnvironmentScience and Technologysnow coverice coverSatellitesRemote sensingClimate changeIceSnowGlaciersIce caps Data format description - Version 4PDF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Trishchenko_MSI_V4_2000-2017_EN_20180223.pdf Data format description - Version 3PDF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Trishchenko_MODIS_MSI_Data_Format_Description_20161124_v3_FR.pdf Data format description - Version 4PDF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Trishchenko_MSI_V4_2000-2017_FR_20180223.pdf Probability of the annual minimum snow and ice (MSI) presence over Canada (GeoTIFF) – Version 4 – 2000 and beyondTIFF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Minimum_Snow_And_Ice_Probability_geotiff.zip Probability of the annual minimum snow and ice (MSI) presence over Canada (Flat raster binary, IMG) – Version 4 – 2000 and beyondFlat raster binary https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Minimum_Snow_And_Ice_Probability_img.zip Data format description - Version 3PDF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Trishchenko_MODIS_MSI_Data_Format_Description_20161124_v3.pdf Probability of the annual minimum snow and ice (MSI) presence over Canada (Flat raster binary, IMG) – Version 3 – 2000 to 2016Flat raster binary https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Minimum_Snow_Ice_Probability_IMG_V3.zip Probability of the annual minimum snow and ice (MSI) presence over Canada (GeoTIFF) – Version 3 – 2000 to 2016TIFF https://ftp.maps.canada.ca/pub/nrcan_rncan/Climate-change_Changement-climatique/Minimum_Snow_And_Ice_Probability/Minimum_Snow_Ice_Probability_TIFF_V3.zip

Snow and ice are important hydrological resources. Their minimum spatial extent here referred to as annual minimum snow/ice (MSI) cover, plays a very important role as an indicator of long-term changes and baseline capacity for surface water storage. The MSI probability is derived from sequence of seventeen 10-day clear-sky composites corresponding to April, 1 to September, 20 warm period for each year since 2000. Data from Moderate Resolution Imaging Spectroradiometer (MODIS) on Terra satellite for the period since 2000 have been processed with the special technology developed at the Canada Centre for Remote Sensing (CCRS) as described in Trishchenko, 2016; Trishchenko et al., 2016; 2009, 2006, Khlopenkov and Trishchenko, 2008, Luo et al., 2008. The presence of snow or ice is determined for each pixel of the image based on snow/ice scene identification procedure and the probability if computed for the entire warm season as a ratio of number of snow/ice flags to the total number of pixels available (=< 17). The minimum snow and ice extent can be derived from the probability map by applying a certain threshold.

References:

TRICHTCHENKO, A.P., 2016: Probability maps of the annual minimum snow and ice (MSI) presence over April,1 to September, 20 period since 2000 derived from MODIS 250m imagery over Canada and neighbouring regions. Data format description. CCRS, NRCan. 4pp.

Data and Resources

Geographic Information

Spatial Feature

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Delivery Point: 6-C9, 560 Rochester Street

City: Ottawa

Administrative Area: Ontario

Postal Code: K1A 0E4

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Electronic Mail Address: alexander.trichtchenko@canada.ca

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