UAS remote sensing applications to abrupt cold region hazards

Frontiers in Remote Sensing, Journal Year: 2023, Volume and Issue: 4

Published: Aug. 14, 2023

Unoccupied aerial systems (UAS) are an established technique for collecting data on cold region phenomenon at high spatial and temporal resolutions. While many studies have focused remote sensing applications monitoring long term changes in regions, the role of UAS detection, monitoring, response to rapid direct exposures resulting from abrupt hazards regions is its early days. This review discusses recent platforms sensors, with a focus observation techniques rather than post-processing approaches, abrupt, including permafrost collapse event-based thaw, flooding, snow avalanches, winter storms, erosion, ice jams. The pilot efforts highlighted this demonstrate potential capacity complement existing acquisition hazards. In cases, UASs were used alongside other (e.g., satellite, airborne, terrestrial) situ sampling supplement or collect additional types not included datasets thermal, meteorological). majority involved creation digital elevation models surface using Structure-from-Motion (SfM) photogrammetry, describes observations that help assess risks, identify impacts, enhance decision making. As frequency intensity changes, it will become increasingly important document understand these support scientific advances hazard management. decreasing cost increasing accessibility technologies create more opportunities leverage address current research gaps. Overcoming challenges related implementation new technologies, modifying operational restrictions, bridging gaps between resolutions, creating tailored risk communication damage assessments increase improve understanding risks reduce those associated future, can benefit made by adopters who identified exciting avenues advancing via innovative use both emerging sensors.

Language: Английский

Recovery of salt marsh vegetation after ice-rafting

Marine Ecology Progress Series, Journal Year: 2023, Volume and Issue: 710, P. 57 - 70

Published: March 28, 2023

Sediment transport on salt marsh platforms is usually brought about through storm events and high tides. At latitudes, ice-rafting a secondary mechanism for sediment transport, redistributing from tidal flats, channels, ponds to marshland. In January 2018, winter Grayson hit the North Atlantic coast, producing large surge significant decrease in temperature. The Great Marsh Plum Island Sound, Massachusetts, USA, experienced an unprecedented deposition due ice-rafting, burying vegetation. Plant vegetation recovery was investigated 17 patches, dominated by Spartina patens , Distichlis spicata, Juncus gerardi S. alterniflora . analysis carried out considering number of stems stem height each species. D. spicata firstly occupied bare while once smothered sediment, regrew slowly. inside patches recovered, average, after 2 growing seasons. J. not significantly affected ice-rafted deposition. dynamics were different depending physical edaphic conditions. some locations, did recover layer had positive effect vigor, increasing maintaining density. results suggest beneficial only accretion, but also growth, both which are fundamental restoration.

Language: Английский