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Landfast ice properties over the Beaufort Sea region in 2000-2019 from MODIS and Canadian Ice Service data

Trishchenko, Alexander P ; Kostylev, Vladimir E ; Luo, Yi ; Ungureanu, Calin ; Whalen, Dustin ; Li, Junhua

Canadian journal of earth sciences, 2022-11, Vol.59 (11), p.847-865 [Periódico revisado por pares]

1840 Woodward Drive, Suite 1, Ottawa, ON K2C 0P7: National Research Council of Canada

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Título:
Landfast ice properties over the Beaufort Sea region in 2000-2019 from MODIS and Canadian Ice Service data
Autor: Trishchenko, Alexander P ; Kostylev, Vladimir E ; Luo, Yi ; Ungureanu, Calin ; Whalen, Dustin ; Li, Junhua
Assuntos: Arctic Ocean ; Arctique canadien ; baie Mackenzie ; banquise côtière ; Barter Island ; Beaufort Sea ; Canada ; Canadian Arctic ; Cape Bathurst ; Cenozoic ; Clear sky ; climate change ; coastal environment ; Coastal zone ; Composite materials ; Correlation coefficient ; Correlation coefficients ; Dislocation ; Distance ; données satellites ; Geomorphological research ; global change ; global warming ; Herschel Island ; Ice ; ice cover ; Ice properties ; Ice-free periods ; landfast ice ; Littoral environments ; Mackenzie Bay ; mer de Beaufort ; MODIS ; Northwest Territories ; Polar environments ; Quaternary ; Quaternary geology ; Remote sensing ; Resolution ; Richards Island ; Satellite data ; Satellite imagery ; satellite methods ; Satellites ; Sea ice ; shallow-water environment ; Spatial discrimination ; spatial distribution ; Spatial resolution ; Spectroradiometers ; Statistical analysis ; Surface-ice melting ; Water depth ; Western Canada
É parte de: Canadian journal of earth sciences, 2022-11, Vol.59 (11), p.847-865
Descrição: 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) × 103 km2 from Canadian Ice Service data versus 45.1 (±6.1) × 103 km2 from satellite data used in this study (7.0% difference). The correlation coefficient for April-June is 0.73 (p = 2.91 × 10-4). The long-term linear trends of the April-June spatial extent since 2000 demonstrated statistically significant decline: -4.45 (±1.69) × 103 km2/decade and -4.73 (±2.17) × 103 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.
Editor: 1840 Woodward Drive, Suite 1, Ottawa, ON K2C 0P7: National Research Council of Canada
Idioma: Inglês

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Landfast ice properties over the Beaufort Sea region in 2000-2019 from MODIS and Canadian Ice Service data

Trishchenko, Alexander P ; Kostylev, Vladimir E ; Luo, Yi ; Ungureanu, Calin ; Whalen, Dustin ; Li, Junhua

1840 Woodward Drive, Suite 1, Ottawa, ON K2C 0P7: National Research Council of Canada

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