The effect of grass transpiration on the air temperature

摘要: Oscillations of the air temperature and tensiometric pressure soil water were measured in experimental slope Tomsovka (Czech Republic, Jizera Mts, 822 m a.s.l.). The brown forest (Dystric Cambisols) is covered with Calamagrostis villosa, Avenella flexuosa Vaccinium myrtilus. Thermometers placed at a height 5 200 cm above grassland. tensiometer was installed root zone grass depth 15 cm. cloudless day, August 24, 2001, (sunshine duration 12.1 hour/day, daily total global radiation 22.4 MJ/m2/day, maximum intensity 1008 W/m2, transpiration 13.7 MJ/m2/day) analysed detail. oscillations period about 30 to 60 minutes recorded course taken from 11 am pm. At ranged 24 28°C. Concurrently, cm, range −6 −11 kPa 8 4 It concluded that resulted autonomous self-regulated transpiration. evident 2-m significantly influenced by plants around large area. fact oscillated sharply confirms rate synchronized this Vegetative cover thus created superorganism substantially affected near-ground atmosphere layer.