| Title | Minimum snow/ice extent over the northern circumpolar landmass in 2000-19: how much snow survives the summer melt? |
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| Author | Trishchenko, A P ;
Ungureanu, C |
| Source | Bulletin of the American Meteorological Society vol. 102, issue 4, 2021 p. E748-E764, https://doi.org/10.1175/BAMS-D-20-0177.1  Open Access |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20200561 |
| Publisher | American Meteorological Society |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Alberta; British Columbia; Newfoundland and Labrador; Northwest Territories; Nunavut; Quebec; Saskatchewan; Yukon; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova
Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Area | Northern Hemisphere |
| Lat/Long WENS | -180.0000 180.0000 90.0000 20.0000 |
| Subjects | geophysics; Science and Technology; Nature and Environment; snow; ice; glaciers; remote sensing; satellite imagery; temperature; statistical analyses; mapping techniques; climate effects; climate,
arctic; Moderate Resolution Imaging Spectroradiometer (MODIS); European Reanalysis (ERA5); Randolph Glacier Inventory (RGI 6.0); Methodology; Trends; Climate change; cumulative effects |
| Illustrations | time series; geoscientific sketch maps; satellite images; tables; plots |
| Program | Canada Centre for Remote Sensing Optical methods and applications |
| Program | Climate Change Geoscience |
| Released | 2021 04 16 |
| Abstract | A novel satellite image processing technique developed at the Canada Centre for Remote Sensing has been utilized to produce annual time series of the minimum snow/ice (MSI) extent over the northern
circumpolar landmass area (9,000 km × 9,000 km) for 2000-19. The information has been derived from the Moderate Resolution Imaging Spectroradiometer 10-day clear-sky composites generated at 250-m spatial resolution over the April-September period.
Derived interannual variations agree very well with the warm-season average surface air temperatures from the European reanalysis (ERA5). The region-average correlation coefficient is -0.78. The total MSI extent demonstrated a statistically
significant declining trend equal to -1,477 km2/yr. Results have been compared with data from the Randolph Glacier Inventory (RGI 6.0). The comparison points to a significant contribution of minimum seasonal snow cover relative to RGI glacierized
areas. Quantitative estimates obtained for the first time showed that the region-average snow extent that survives the summer melt and resides outside of RGI area can be as high as 15% (or 53 × 10000 km2) while in the northern Canadian Arctic it can
reach 41% (or 43 × 10000 km2). The derived MSI time series data can be recommended to the glacier and land-cover scientific community as a source of validation data and annual updates of snow and ice maps over the northern circumpolar landmass.
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| Summary | (Plain Language Summary, not published)
For the first time, time series of annual minimum snow / ice extent over the Northern landmass have been derived and used to assess the snow extent that
survives the summer melt. |
| GEOSCAN ID | 327791 |
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