The relation between active layer depth and a spectral vegetation index in arctic tundra landscapes of the North Slope of Alaska

arctic tundra carbon dioxide depth dioxyde de carbone frigid soils gas exchange grasslands herbage intercambio de gases permafrost areas praderas profondeur profundidad remote sensing suelo helado toundra toundra arctique tundra tundra artica vegetation zonas de hielo permanente zone de gel permanent