Cumulative Changes in Minimum Snow/Ice Extent over Canada and Northern USA for 2000–2023: Changements cumulatifs de l’étendue minimale de neige/glace au Canada et dans le nord des États-Unis pour 2000-2023
| Autor: | Alexander P. Trishchenko, Calin Ungureanu |
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| Jazyk: | English<br />French |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Canadian Journal of Remote Sensing, Vol 50, Iss 1 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1712-7971 07038992 |
| DOI: | 10.1080/07038992.2024.2371359 |
| Popis: | The Minimum Snow/Ice (MSI) extent is an important climate and environmental indicator related to surface hydrology and freshwater resources. Variations in the MSI extent over the four first-order regions (1-4) included in the Randolph Glacier Inventory (RGI) for Canada and the Northern USA were analyzed in this study using an improved land-water mask to better discriminate landfast ice in the high Arctic coastal zone. The analysis utilized warm season snow/ice probability maps derived from MODIS clear-sky composite imagery at a 250-m spatial resolution. Results showed statistically significant declining trends in the minimum snow/ice extent with the average value of the slope for the entire area (-1,177.7 ± 362.8) km2/yr. The variations in MSI extent are well correlated with surface air temperature. The correlation coefficients are statistically significant, ranging from −0.79 to −0.82. The detailed analysis revealed a reduction of the area with snow/ice probability 100% over the RGI glaciated zones, while areas with lower probability values were increasing in size, which may be interpreted as an indication of general glacier shrinkage over the study area. |
| Databáze: | Directory of Open Access Journals |
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