Statistical analysis of atmospheric refractive index structure constant near ground in Gobi region

The refractive index structure constant (RISC) near the ground in Gobi region from April to December in 2010 was measured by using micro-thermal meter. The logarithmic average of measured data was calculated by the month, and then its daily variation characteristics were analyzed. Thus the times when the atmospheric turbulence was strong or weak in a day were given. In Gobi region, the atmospheric turbulence at sunset is weaker than at sunrise. At sunrise conversion time, the averaged RISC is below 10-15 m-2/3. At sunset conversion time, the averaged RISC is about 10-16 m-2/3. The atmospheric turbulence is stronger in April, June, August, and September, and weaker in November and December.