Satellite data in thermal range for natural and technogenic ecosystems monitoring

• Published in: E3S Web of Conferences
• Main Authors: Yakimov Nikita, Ponomarev Evgenii, Ponomareva Tatiana
• Format: Article in Journal/Newspaper
• Language: English; French
• Published: EDP Sciences 2021
• Subjects: geo; envir; permafrost; Siberia
• Online Access: https://doi.org/10.1051/e3sconf/202133302017; https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/109/e3sconf_rpers2021_02017.pdf; https://doaj.org/article/972609bbdeb449c785006ef963aae924

A method for recovery monitoring in post-fire and post-technogenic landscapes was proposed based on satellite data in a wide spectral range, including the infrared band data. A decrease in the spectral surface albedo in post-fire areas, caused by the destruction of on-ground vegetation, provokes excessive heating of the surface and upper soil layer. Surface thermal anomalies were evaluated under conditions of changes in the heat-insulating properties of vegetation and ground cover. The relative temperature anomalies in post-fire plots (overestimation up to 30% compared to non-disturbed territory) are typical for permafrost conditions of Siberia. Similar process was recorded for both natural (post-fire) and post-technogenic landscapes. Within 22 years after the fire, thermal insulation properties of the vegetation cover were restored. Thus, the relative temperature anomaly (of 3±1%) has reached the background value. In post-technogenic plots, conditions are more “contrast” compared to the background, and restoration of the thermal regime takes significantly longer (>60 years). “Neo-technogenic ecosystems” with specific soil thermal regimes compared to the background ones are formed both for reclaimed and for non-reclaimed post-technogenic plots. On average, surface temperature has overestimated at least by 10–15% in post-technogenic plots compared to non-disturbed territory.