Characteristics of the vertical structure of the atmospheric turbulence in the Tibetan Plateau

作     者：Kun ZHANG Yang WU Feifei WANG Xuebin LI Shengcheng CUI Zihan ZHANG Xiaoqing WU Ningquan WENG Tao LUO Yinbo HUANG Kun ZHANG;Yang WU;Feifei WANG;Xuebin LI;Shengcheng CUI;Zihan ZHANG;Xiaoqing WU;Ningquan WENG;Tao LUO;Yinbo HUANG

作者机构：School of Environmental Science and Optoeclectronic TechnologyUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Atmospheric OpticsAnhui Institute of Optics and Fine Mechanics(AIOFM)Chinese Academy of SciencesHefei 230031China Science Island Branch of Graduate SchoolUniversity of Science and Technology of ChinaHefei 230026China Advanced Laser Technology Laboratory of Anhui ProvinceHefei 230037China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2022年第65卷第7期

页      面：1368-1378页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Class A)(Grant No.XDA17010104) the National Natural Science Foundation of China(Grant Nos.4157685&91752103) 

主　　题：Tibetan Plateau Strong turbulent band Thermal forcing Stratosphere-troposphere exchange Tropopause 

摘      要：The Tibetan Plateau(TP)has unique atmospheric dynamics and thermal structures that originate from its giant terrain and complex *** vertical-resolution thermal radiosondes were launched near the central(Lhasa,91°06′E,29°36′N,3670 m above sea level(ASL))and marginal(Da Qaidam,95°21′E,37°51′N,3180 m ASL)areas of the TP during the summers of 2018 and 2020,*** turbulence parameters were calculated,and the characteristics of the atmospheric turbulent vertical structure at sunset in these two areas were analyzed and *** by TP thermal forcing and stably controlled by the summer monsoon anticyclone,the atmospheric refractive index structure constant(C_(n)^(2))tended to increase and then decrease with increasing height,reaching a maximum at the tropopause(~18 km ASL)at the Lhasa *** C_(n)^(2) at the Da Qaidam site also tended to increase at the tropopause,the position of the strong turbulent band(STB)(5–7 km ASL)was below the tropopause height corresponding to the potential temperature lapse rate *** vertical distribution of C_(n)^(2) at the two sites,particularly regarding the position of the STB,was highly correlated with the atmospheric stability(Ri)and the thermal mixing scale(L_(T)).The significant correlations among the three parameters(STB,Ri,and L_(T))indicated that the strong fluctuations in temperature caused by thermal mixing were the dominant factor causing the Ri to be less than its critical value of ***,the suppression strength involving the upward transport of the heat sources was the main reason for the different turbulent vertical structures and STB positions at the two *** zonal mean thermodynamic and dynamical fields derived from the reanalysis data also showed a height difference in the heat sources transported to the troposphere at the two *** the marginal TP,the material and energy in the lower troposphere were transported by the turbulent atmosphere upward along the slop