| Title | Landfast ice mapping using MODIS clear-sky composites: application for the Banks Island coastline in Beaufort Sea and comparison with Canadian Ice Service data / Cartographie des glaces côtières à l'aide
de composites MODIS ciel clair : application pour la côte de l'île Banks en mer de Beaufort et comparaison avec les données du Service canadien des glaces |
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| Author | Trishchenko, A P ;
Luo, Y |
| Source | Canadian Journal of Remote Sensing 2021 p. 1-16, https://doi.org/10.1080/07038992.2021.1909466  Open Access |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20200759 |
| Publisher | Taylor & Francis Group |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 97G; 97H/12; 97H/13; 98A/04; 98A/05; 98A/12; 98A/13; 98B; 98C; 98D/04; 98D/05; 98D/12; 98D/13; 98E/04; 98E/05; 98F |
| Area | Banks Island; Beaufort Sea |
| Lat/Long WENS | -127.0000 -123.0000 74.5000 71.5000 |
| Subjects | environmental geology; marine geology; geophysics; Nature and Environment; Science and Technology; ice; sea ice; coastal environment; coastal studies; remote sensing; satellite imagery; climate effects;
climate, arctic; statistical analyses; bathymetry; Moderate Resolution Imaging Spectroradiometer (MODIS); Canadian Ice Service; Climate change; Trends; elevations; Methodology |
| Illustrations | location maps; geoscientific sketch maps; satellite images; time series; tables |
| Program | Climate Change Geoscience Coastal Infrastructure |
| Released | 2021 04 20 |
| Abstract | Landfast ice (LFI) is a prominent climatological feature in the Canadian Arctic. LFI is generally defined as immobile near-shore ice that remains fast along the coast and forms seaward from the land. It
affects the coastline dynamics, is important for the near-shore ecosystems, wildlife, and human socio-economic activities. A method is proposed for mapping the LFI using time series of 10-day clear-sky composites derived at the Canada Center for
Remote Sensing (CCRS) from the Moderate Resolution Imaging Spectroradiometer (MODIS) 250-m imagery. The delineation of coastal zone ice utilizes simultaneous analysis of the mean and standard deviation of MODIS monthly reflectance maps. The
application of this method is demonstrated for a 20-year period (2000-2019) over the coastal zone of Banks Island in the Beaufort Sea. Detailed analyses have been conducted for three LFI parameters: (1) the total area (spatial extent) occupied by
LFI; (2) the distance from the coast to the outer seaward LFI edge, and (3) the water depth at the outer seaward LFI edge. Comparison with the Canadian Ice Service (CIS) data demonstrates good agreement. The average correlation coefficients between
CIS and CCRS time series in April-June, when the area reaches a maximum, are equal to 0.87-0.88. The mean differences (CIS-CCRS) are 344 km2 (5,464 km2 vs 5,120 km2) or 6.3% for the spatial extent; 1.3 km (17.6 km vs 16.3 km) or 7.4% for the
distance; -2.7 m (-27.4 m vs -24.7 m) or 10% for the water depth. Because the CCRS method uses monthly statistics, it tends to exclude potentially more mobile continuous landfast ice zones than the CIS analysis which is based on data collected on a
specific date. The long-term trends of the LFI seasonal cycle in our region of interest since 2000 have shown a tendency for an earlier break-up, later onset, and longer ice-free period; however, these trends are not statistically significant.
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| Summary | (Plain Language Summary, not published)
Landfast ice (LFI) is a prominent climatological feature in the Canadian Arctic. LFI is generally defined as immobile near-shore ice that remains fast
along the coast and forms seaward from the land. It affects the coastline dynamics, is important for the near-shore ecosystems, wildlife, and human socio-economic activities. A method is proposed for mapping the LFI using time series of 10-day
clear-sky composites derived at the Canada Centre for Remote Sensing (CCRS) from the Moderate Resolution Imaging Spectroradiometer (MODIS) 250-m imagery. The application of this method is demonstrated for a 20-year period (2000-2019) over the coastal
zone of Banks Island in the Beaufort Sea. Detailed analyses have been conducted for three LFI parameters: 1) the total area (spatial extent) occupied by LFI; 2) the distance from the coast to the outer seaward LFI edge, and 3) the water depth at the
outer seaward LFI edge. Comparison with the Canadian Ice Service (CIS) data demonstrates good agreement. The long-term trends of the LFI seasonal cycle in our region of interest since 2000 have shown a tendency for an earlier break-up, later onset,
and longer ice-free period; however, these trends are not statistically significant |
| GEOSCAN ID | 328138 |
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