| Title | Landfast ice properties over the Beaufort Sea region in 2000-2019 from MODIS and Canadian Ice Service data |
| |
| Author | Trishchenko, A P ;
Kostylev, V E; Luo, Y; Ungureanu, C; Whalen, D; Li, J |
| Source | Canadian Journal of Earth Sciences 2021 p. 1-19, https://doi.org/10.1139/cjes-2021-0011  Open Access |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210273 |
| Publisher | Canadian Science Publishing |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf; html |
| Province | Northern offshore region; Northwest Territories; Yukon |
| NTS | 97; 98; 99; 107; 117 |
| Area | Beaufort 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 |
| Subjects | geophysics; 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 |
| Illustrations | geoscientific sketch maps; satellite images; time series; tables |
| Program | Climate Change Geoscience Coastal Infrastructure |
| Released | 2021 09 20 |
| Abstract | Two 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 ID | 328927 |
|
|