Plateau Meteorology

Plateau Meteorology >

2016 , Vol. 35 >Issue 3: 597 - 607

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.00041

Vertical Structure and Variation Characteristics of Wind Field in Low-Level Atmosphere in the Southeastern Margin of Qinghai-Xizang Plateau

  • DONG Baoju ,
  • LI Jian ,
  • SUN Jihua ,
  • XU Anlun ,
  • SU Jinlan
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  • Dali National Climate Observatory, Dali 671003, China;2. Chinese Academy of Meteorological Sciences, Beijing 100081, China;3. Yunnan Institute of Meteorological Sciences, Kunming 650034, China

Received date: 2014-11-03

  Online published: 2016-06-28

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Abstract

In order to further understanding long-term variation of low-level wind field over the mountains region of the Qinghai-Xizang Plateau,based on the observational data of boundary layer tower and wind profile radar in Dali region of the southeastern margin of the Qinghai-Xizang Plateau from 2008 to 2012,the vertical structure and variation characteristics of wind field were analyzed.The results show as follow:Firstly,wind speed and wind direction frequency in the low-level atmosphere varied with height.Wind force scale was 2 level and prevailing winds were east winds between 2 m and 400 m height.It indicated that wind speed and wind direction measured with boundary layer tower and wind profile radar was continuous.Secondly,vertical wind speed changed with season,which its value was greater in winter than that in summer.The diurnal variations of wind speed at different height were different,that is to say,the diurnal variations of wind speed displayed one peak below 20 m and two speaks between 100 m and 1500 m height,and were not evident above 2000 m height.The monthly variations of wind speed showed one speak below 20 m and above 1500 m height,and showed two speaks between 100 m and 1000 m height.Finally,the zonal winds below 600 m height appeared a daily cycle of east wind and west wind.The meridional winds were south winds all the day between 2 m and 20 m height,and were south winds from afternoon to sunset and north winds form night to next morning above 100 m height.

Key words： Dali region; Wind profile radar; Structure of wind pr; Wind speed; Wind direction

Cite this article

DONG Baoju , LI Jian , SUN Jihua , XU Anlun , SU Jinlan . Vertical Structure and Variation Characteristics of Wind Field in Low-Level Atmosphere in the Southeastern Margin of Qinghai-Xizang Plateau[J]. Plateau Meteorology, 2016 , 35(3) : 597 -607 . DOI: 10.7522/j.issn.1000-0534.2015.00041

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