Comparative Analysis of the Gradient of Meteorological Elements at Different Elevations of the North Slope of the Middle Kunlun Mountains from 2022 to 2023
Received date: 2024-01-22
Revised date: 2024-05-06
Online published: 2024-05-06
The north slope of the Middle Kunlun Mountains contains different sub-surfaces such as oases, deserts and their transition zones, as well as deserts and plateau climates, with great ecological differences and climate variations from north to south.However, the poor natural environment of the mountainous areas and the lack of sufficient meteorological stations and unevenly distribution of them, which bringing certain challenges to the study of meteorological elements, and resulting in incomplete mastery of meteorological elements in the region.Therefore, it is necessary to perform a study on the meteorological elements of the North Slope of the Central Kunlun Mountains.This study utilized meteorological data from nine meteorological stations at different altitudes on the northern slopes of the Central Kunlun Mountains in a consecutive year (August 2022 to July 2023) to investigate the spatial and temporal characteristics of near-surface meteorological elements at the altitude of 1.5 m in the mountainous areas in response to the gradient.The results show that: (1) The wind direction changed significantly at different altitudes, the wind speed increased with increase of the elevation, the metrological station at 1738~3044 m above sea level was affected by the valley wind, and two dominant "twin peaks type" were observed for the daily change of wind speed; (2) The temperature lapse rate (TLR) on the north slope of the Central Kunlun Mountains is lower than the standard atmospheric temperature lapse rate, and the TLRmean(mean temperature laspe rate), TLRmax(max temperature laspe rate) and TLRmin(min temperature laspe rate) were -0.56 ℃·(100m)-1, -0.60 ℃·(100m)-1 and -0.47 ℃·(100m)-1, respectively, with seasonal characteristics of steepness in summer and shallowness in winter; (3) There are several inversion temperature layers and inversion humidity layers at different altitudes, and the seasonal differences in the degree of inversion temperature and inversion humidity were large, which are manifested as the smallest intensity of inversion temperature and the larger intensity of inversion humidity in summer, the largest degree of inversion temperature and the smallest intensity of inversion humidity in winter, and the strongest inversion temperature and inversion humidity were found at the altitude between 1256 m and 1409 m; (4) The inverse temperature and inverse humidity under typical summer weather were greater on sunny days than that of on rainy days, and the maximum inverse temperature intensity on sunny days was equal to 4.32 times of the rainy days, while the range of variation of specific humidity on sunny days was greater than that on rainy days, and the intensity of inverse humidity was equal to 1.11 times of the rainy days; (5) The North Slope of the Middle Kunlun Mountains accounted for more than 86% of the total annual precipitation from April to September, the precipitation change gradient was more obvious with changes in altitude, and showed "increase - decrease - increase"trend, a obvious precipitation zone was found around 2800~3200 m.
Yueyue XU , Qing HE , Donglei MAO , Guangxiang FU , Jingjing LI , Yongqiang WANG , Qian ZHANG . Comparative Analysis of the Gradient of Meteorological Elements at Different Elevations of the North Slope of the Middle Kunlun Mountains from 2022 to 2023[J]. Plateau Meteorology, 2025 , 44(1) : 224 -239 . DOI: 10.7522/j.issn.1000-0534.2024.00064
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