| Titre | Minimum snow/ice extent over the northern circumpolar landmass in 2000-19: how much snow survives the summer melt? |
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| Auteur | 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  Accès ouvert |
| Image |  |
| Année | 2021 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200561 |
| Éditeur | American Meteorological Society |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1175/BAMS-D-20-0177.1 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Alberta; Colombie-Britannique; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Nunavut; Québec; Saskatchewan; Yukon; Colombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec;
Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut; Canada |
| SNRC | 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 |
| Région | Northern Hemisphere |
| Lat/Long OENS | -180.0000 180.0000 90.0000 20.0000 |
| Sujets | neige; glace; glaciers; télédétection; imagerie par satellite; temperature; analyses statistiques; techniques de cartographie; effets climatiques; climat arctique; Méthodologie; Tendances; Changement
climatique; effets cumulatifs; géophysique; Sciences et technologie; Nature et environnement |
| Illustrations | séries chronologiques; cartes géolscientiques généralisées; images satellitaires; tableaux; graphiques |
| Programme | Centre canadien de télédétection Méthodes et applications optiques |
| Programme | Géosciences de changements climatiques |
| Diffusé | 2021 04 16 |
| Résumé | (disponible en anglais seulement)
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. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Pour la première fois, des séries chronologiques de l'étendue annuelle minimale de neige / glace sur la masse continentale du Nord ont été
dérivées et utilisées pour évaluer l'étendue de neige qui survit à la fonte estivale. |
| GEOSCAN ID | 327791 |
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