Turbulent motion is the essential characteristic of atmospheric boundary layer, as well as the main pathway of atmospheric energy and mass transfer. The atmospheric turbulent variance and characteristic quantities are investigated over the Yamzhog Yumco based on eddy covariance data during April-October 2016 and 2017. The main results are summarized as follows. (1) The dimensionless standard deviations of velocity components, sonic temperature, vapor density, and CO₂ density varying with stability follow the law of "1/3" or "-1/3" fractional power of Monin-Obukhov Similarity Theory in unstable stratification, and the fitting effect of vertical speed is optimal. The dimensionless standard deviations of all physical quantities except CO₂ density, versus stability are also in agreement with the fractional power law in stable stratification. Under the near neutral stratification, these dimensionless standard deviations reach constants:3.57, 3.93, 0.77, 20.91, 6.35 and 11.96, respectively. (2) The horizontal turbulent intensities (on average, 0.60 and 0.58) are larger than vertical turbulent intensity (0.13), and the variations of three-dimensional turbulent intensities with average wind speed show significant negative correlation with the coefficients of -0.39, -0.42 and -0.34, respectively. (3) Turbulent kinetic energy increases with wind speed with the rate of 0.45 m/s, and it displays stronger in near neutral stratification, while decreases when the atmosphere becomes stable or unstable. (4) Momentum flux is large during 13:00-22:30 with the average of 0.091 kg/(m·s²). Latent heat flux, 5.3 times higher than sensible heat flux with daily average value (14.6 W/m²), plays a leading role in heat transportation. Sensible and latent heat flux reach maximum value at 5:30 (22.4 W/m²) and 16:00 (106.6 W/m²), respectively.