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Remote sensing plays an important role within the field of forest inventory. Airborne laser scanning (ALS) has become an effective tool for acquiring forest inventory data. In most ALS-based forest inventories, accurately positioned field plots are used in the process of relating ALS data to field-observed biophysical properties. The geo-referencing of these field plots is typically carried out by means of differential global navigation satellite systems (dGNSS), and often relies on logging times of 15?20 min to ensure adequate accuracy under different forest conditions. Terrestrial laser scanning (TLS) has been proposed as a possible tool for collection of field data in forest inventories and can facilitate rapid...
A critical part of the National Park Service’s Arctic Network Inventory and Monitoring Programis monitoring the Western Arctic Caribou Herd (WACH). The status, distribution, movementsand trends in the condition of caribou in all five park units are monitored. Accurate and detailedmodels of snow cover within the range of the Western Arctic Caribou Herd will provideimportant context to help understand movement patterns and timing of caribou migrations. Snowdepth influences caribou winter distribution and habitat availability by impacting the costs oflocomotion and cratering for forage plants and lichens. Snow depth patterns on the landscapealso influence plant communities, affecting the distribution of preferred forage...
Tracking landscape-scale water status in high-latitude boreal systems is indispensible to understanding the fate of stored and sequestered carbon in a climate change scenario. Spaceborne synthetic aperture radar (SAR) imagery provides critical information for water and moisture status in Alaskan boreal environments at the landscape scale. When combined with results from optical sensor analyses, a complementary picture of vegetation, biomass, and water status emerges. Whereas L-band SAR showed better inherent capacity to map water status, C-band had much more temporal coverage in this study. Analysis through the use of L- and C-band SARs combined with Landsat Enhanced Thematic Mapper Plus (ETM+) enables landscape...
map background search result map search result map Satellite boreal measurements over Alaska and Canada during June-July 2004: Simultaneous measurements of upper tropospheric CO, C2H6, HCN, CH3Cl, CH4, C2H2, CH3OH, HCOOH, OCS, and SF6 mixing ratios (DOI 10.1029/2006GB002795) Satellite boreal measurements over Alaska and Canada during June-July 2004: Simultaneous measurements of upper tropospheric CO, C2H6, HCN, CH3Cl, CH4, C2H2, CH3OH, HCOOH, OCS, and SF6 mixing ratios (DOI 10.1029/2006GB002795)