Physical short‐term changes after a tussock tundra fire, Seward Peninsula, Alaska

摘要: [1] The Kougarok area, situated on the central Seward Peninsula, Alaska, experienced a severe fire in August 2002. This may be only tundra where high-quality prefire (1999–2002) and postfire (2003–2006) active layer meteorology measurements have been collected same locations. After fire, near-surface soil showed increased moisture at burned tussock site, remaining close to saturation throughout thawed season 2003–2006. Despite wetter after freezing occurred earlier site than control, indicating importance of reduced organic layer. Severe combustion lichen moss left 15–25 cm high tussocks, resulting doubling surface roughness coefficient. Average September temperature 2.3 ± 0.7°C 1 m profile, depth, although this is due partly favorable meteorological conditions. The shrubby control station mean annual increase 1.1 0.3°C upper 0.5 m. A similar change was found site. Cooler weather conditions 2006 stagnated soil-warming trend, which How thermal regimes will affected highly influenced by weather, severity, vegetation regrowth, vegetation, ground ice