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TitleLandfast ice properties over the Beaufort Sea region in 2000-2019 from MODIS and Canadian Ice Service data
 
AuthorTrishchenko, A PORCID logo; Kostylev, V E; Luo, YORCID logo; Ungureanu, C; Whalen, DORCID logo; Li, J
SourceCanadian Journal of Earth Sciences 2021 p. 1-19, https://doi.org/10.1139/cjes-2021-0011 Open Access logo Open Access
Image
Year2021
Alt SeriesNatural Resources Canada, Contribution Series 20210273
PublisherCanadian Science Publishing
Documentserial
Lang.English
Mediapaper; digital; on-line
File formatpdf; html
ProvinceNorthern offshore region; Northwest Territories; Yukon
NTS97; 98; 99; 107; 117
AreaBeaufort Sea; Amundsen Gulf; M'Clure Strait; Alaska; Barter Island; Herschel Island; Mackenzie Bay; Richards Island; Cape Bathurst; Canada; United States of America
Lat/Long WENS-165.0000 -120.0000 78.0000 68.0000
Subjectsgeophysics; Science and Technology; Nature and Environment; oceanography; sea ice; remote sensing; satellite imagery; statistical analyses; bathymetry; temperature; coastal environment; environmental studies; climate effects; Moderate Resolution Imaging Spectroradiometer (MODIS); Canadian Ice Service; Arctic; Climate change; Methodology
Illustrationsgeoscientific sketch maps; satellite images; time series; tables
ProgramClimate Change Geoscience Coastal Infrastructure
Released2021 09 20
AbstractTwo decades (2000-2019) of the landfast ice properties in the Beaufort Sea region in the Canadian Arctic were analyzed at 250 m spatial resolution from two sources: (1) monthly maps derived at the Canada Centre for Remote Sensing from the Moderate Resolution Imaging Spectroradiometer clear-sky satellite image composites; and (2) Canadian Ice Service charts. Detailed comparisons have been conducted for the landfast ice spatial extent, the water depth at, and the distance to the outer seaward edge from the coast in four sub-regions: (1) Alaska coast; (2) Barter Island to Herschel Island; (3) Mackenzie Bay; and (4) Richards Island to Cape Bathurst. The results from both sources demonstrate good agreement. The average spatial extent for the entire region over the April-June period is 48.5 (±5.0) x 1000 km2 from Canadian Ice Service data versus 45.1 (±6.1) x 1000 km2 from satellite data used in this study (7.0% difference). The correlation coefficient for April-June is 0.73 (p = 2.91 x .0001). The long-term linear trends of the April-June spatial extent since 2000 demonstrated statistically significant decline: -4.45 (±1.69) x 1000 km2/decade and -4.73 (±2.17) x 1000 km2/decade from Canadian Ice Service and satellite data, respectively. The landfast ice in the Beaufort Sea region showed the general tendency for an earlier break-up, later onset, and longer ice-free period. The break-up date has decreased by 7.6 days/decade in the Mackenzie Bay region. The western part of the study area did not demonstrate statistically significant changes since 2000.
Summary(Plain Language Summary, not published)
Two decades (2000-2019) of the landfast ice properties in the Beaufort Sea region were analyzed at 250-m spatial resolution from two sources: 1) monthly maps derived at the Canada Centre for Remote Sensing; 2) Canadian Ice Service charts. Detailed comparisons have been conducted for the spatial extent, the water depth at and the distance from the coast in four sub-regions: 1) Alaska coast; 2) Barter Island to Herschel Island; 3) Mackenzie Bay; 4) Richards Island to Cape Bathurst. The CCRS and CIS results demonstrate good agreement. The correlation coefficient between CCRS and CIS spatial extent is 0.73. The long term linear trends of the landfast ice spatial extent since 2000 demonstrated statistically significant decline. The landfast ice in the Beaufort Sea region showed the general tendency for an earlier break-up, later onset and longer ice-free period. The break-up date has decreased by 7.6 days/decade in the Mackenzie Bay region. The western part of the study area did not demonstrate statistically significant changes since 2000.
GEOSCAN ID328927

 
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