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, Trishchenko and Ungureanu, 2021, 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 (less or equal to 17). The minimum snow and ice extent can be derived from the probability map by applying a certain threshold.

New data version V5.0 replaces previous version V4.0 for all data available since 2000. All MSI files were reprocessed for all MODIS input data based on collection 6.1. The output format has not changed since previous version. It is described in Trishchenko (2024). The impact of input data change is small and can be detected only for time interval 2000-2015. Data starting 2016 has been already derived using MODIS collection 6.1 input.

The differences between the MSI data based on MODIS Collection 5 (i.e. MSI V4) versus MODIS Collection 6.1 (i.e. MSI V5), on average, are quite small. The region-wide relative difference in the MSI extent varies from -3.97% to +1.75%. The mean value is -0.14%, the median value is 0.18% and standard deviation is 1.83%. As such, we do not expect any sizeable impact of the version change on our previous conclusions regarding trends and climate variations, except for refining the relative values of statistical parameters within the range of a few percents.

References:

TRISHCHENKO, A.P., 2024: 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.

Simple

Date ( RI_366 )
2018-02-28
Date ( RI_368 )
2024-11-18
Date ( RI_367 )
2020-04-02
RI_414
  Government of Canada; Natural Resources Canada;Strategic Policy and Innovation Sector, Canada Centre for Mapping and Earth Observation, Canada Centre for Remote Sensing - Dr. Alexander P. Trichtchenko ( Research Scientist )
5-C4-4, 588 Booth Street , Ottawa , Ontario , K1A 0E4 , Canada
343-574-6152
613-759-6344
Presentation form
mapDigital;carteNumérique RI_391
Status
onGoing; enContinue RI_596
Maintenance and update frequency
annually; annuel RI_539
Keywords ( RI_528 )
  • snow cover
  • ice cover
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Satellites
  • Climate change
  • Remote sensing
  • Ice
  • Glaciers
  • Snow
  • Ice caps
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Spatial representation type
grid; grille RI_636
Metadata language
eng
Metadata language
fre
Character set
utf8; utf8 RI_458
Topic category
  • Climatology, meteorology, atmosphere
Begin date
2000-04
End date
2024-09
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S
E
W
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Reference system identifier
http://www.epsg-registry.org / EPSG:3978 /
Distribution format
  • TIFF ( N/A )

  • Flat raster binary ( N/A )

RI_412
  Government of Canada; Natural Resources Canada;Strategic Policy and Innovation Sector, Canada Centre for Mapping and Earth Observation, Federal Geospatial Platform - ( )
1-800-661-2638
819-564-5698
OnLine resource
Data format description - Version 4 ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Data format description - Version 3 ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Probability of the annual minimum snow and ice presence (%) ( HTTPS )

Web Service;WMS;eng,fra

OnLine resource
Probability of the annual minimum snow and ice presence (%) ( HTTPS )

Web Service;WCS;eng,fra

OnLine resource
MSI Time Series Application 2000 - 2024 ( HTTPS )

Application;Web App;eng

OnLine resource
MSI Time Series Application 2000 - 2024 ( HTTPS )

Application;Web App;fra

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (GeoTIFF) – Version 5 – 2000 to 2024 ( HTTPS )

Dataset;GeoTIF;zxx

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (Flat raster binary, IMG) – Version 5 – 2000 to 2024 ( HTTPS )

Dataset;Flat raster binary;zxx

OnLine resource
SpatioTemporal Asset Catalog (STAC) Application Programming Interface (API) ( HTTPS )

API;JSON;zxx

OnLine resource
Probability of the annual minimum snow and ice presence (%) ( OGC:WMS )

Web Service;WMS;eng

OnLine resource
Probability of the annual minimum snow and ice presence (%) ( OGC:WMS )

Web Service;WMS;fra

OnLine resource
Data format description - Version 5 ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Data format description - Version 5 ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Data Abstract - Version 5 ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Data Abstract - Version 5 ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Cloud Optimized GeoTiFF (COG) - SpatioTemporal Asset Catalog (STAC) browser ( HTTPS )

Dataset;GeoTIF;eng,fra

OnLine resource
Data format description - Version 4 ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (GeoTIFF) – Version 4 – 2000 to 2022 ( HTTPS )

Dataset;GeoTIF;zxx

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (Flat raster binary, IMG) – Version 4 – 2000 to 2022 ( HTTPS )

Dataset;Flat raster binary;zxx

OnLine resource
Data format description - Version 3 ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (Flat raster binary, IMG) – Version 3 – 2000 to 2016 ( HTTPS )

Dataset;Flat raster binary;zxx

OnLine resource
Probability of the annual minimum snow and ice (MSI) presence over Canada (GeoTIFF) – Version 3 – 2000 to 2016 ( HTTPS )

Dataset;GeoTIF;zxx

File identifier
808b84a1-6356-4103-a8e9-db46d5c20fcf XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2024-11-18T10:45:17
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Natural Resources Canada;Strategic Policy and Innovation Sector, Canada Centre for Mapping and Earth Observation, Canada Centre for Remote Sensing - Dr. Alexander P. Trichtchenko ( Research Scientist )
5-C4-4, 588 Booth Street , Ottawa , Ontario , K1A 0E4 , Canada
343-574-6152
613-759-6344
 
 

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