Analyses on Distribution and Vertical Gradient of Air Temperature on the North Slope of Mt.Qomolangma
The meteorological observation on the north slope of Mt. Qomolangma is valuable to research the climate change and the influence on glacier, especially in the regions where the observational data are limit. The distribution of temperature and characteristic of its gradient change in the surface layer and free atmosphere are analyzed based on the observed meteorological data and the radiosonde data in four different elevations (5 207, 5 550, 5 792, 5 955 m heights above sea level). The results are obtained as follows: The rising rate of mean diurnal variation of temperature per year is largest at 5 207 m height, the larger at 5 550 m height, the smallest at 5 792 and 5 955 m heights. The monthly mean maximum (minimum) temperature at four observation stations is 5. 7 癈 ( - 9. 3 ℃) , 4 ℃ ( - 6. 5 ℃), 1. 4 ℃ ( - 14. 8 ℃) and 1. 3 ℃( -15. 4 ℃) , respectively. The lapse rate of air temperature shows seasonal characteristic. The maximum (minimum) value is about 1.07 ℃ · (100 m)-10. 12 ℃ · (100 m)-1), present in January (March), amplitude of mean diurnal variations in year (spring, summer and autumn) is large in daytime, little at nighttime and stable all the day in winter. The value is positive during 00:00 and 09:00 and positive all the day in other seasons. The value of the lapse rate of free atmospheric temperature is almost 0~l ℃ · (100 m)-1, and the value during 5 200~ 6 000 m heights above sea level is about 0. 78 ℃ · (100 m)-1.
North slope of Mt. QomolangmaLapse rate of air temperatureMountain climate
NETL
NSTL
万方数据
维普
