| 南极中山站至Dome A考察断面湍流参数特征近地层湍流参数特征 |
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| 引用本文： | 马永锋,卞林根,效存德,窦挺峰.南极中山站至Dome A考察断面湍流参数特征近地层湍流参数特征[J].地球物理学报,2011,54(8):1960-1971. |
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| 作者姓名： | 马永锋 卞林根 效存德 窦挺峰 |
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| 作者单位： | 1. 中国气象科学研究院, 北京 100081;
2. 中国科学院研究生院地球科学学院,北京 100049;
3. 中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室,兰州 730000 |
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| 基金项目： | 国家科技支撑计划(2006BAB18B05)、IPY中国行动计划项目和冰冻圈科学国家重点实验室开放基金项目(SKLCS09-07)资助. |
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| 摘 要： | 利用南极中山站至Dome A考察断面上3个自动气象站2005～2007年的观测资料和2008年夏季在中山站附近冰盖获取的湍流观测资料,应用空气动力学方法和涡动相关法计算分析了中山站至Dome A断面上近地层各种湍流参数(感热通量,潜热通量,湍流温度、湿度和速度尺度,地表粗糙度,大气稳定度及动量输送系数)的季节变化、日变...
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| 关 键 词： | 南极冰盖 湍流通量 湍流参数 涡动相关法 空气动力学法 |
| 收稿时间： | 2010-11-02 |
Characteristics of near surface turbulent parameters along the traverse route from Zhongshan Station to Dome A,East Antarctica |
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| MA Yong-Feng,BIAN Lin-Gen,XIAO Cun-De,DOU Ting-Feng.Characteristics of near surface turbulent parameters along the traverse route from Zhongshan Station to Dome A,East Antarctica[J].Chinese Journal of Geophysics,2011,54(8):1960-1971. |
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| Authors: | MA Yong-Feng BIAN Lin-Gen XIAO Cun-De DOU Ting-Feng |
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| Institution: | 1. Chinese Academy of Meteorological Sciences, Beijing 100081, China;
2. College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3. State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Based on the data from Zhongshan Station (eddy covariance measurements) and three Automatic Weather Stations deployed along the traverse route from Zhongshan Station to Dome-A, East Antarctica, and using aerodynamics method and eddy-correlation technique, we analyzed the seasonal and diurnal variation of the near surface turbulent parameters (sensible/latent heat fluxes, turbulent scales of temperature, specific humidity and wind speed, surface roughness length, atmospheric stability and momentum transfer coefficient), as well as their spatial distribution patterns. The results showed that sensible/latent heat fluxes display obvious annual variation and summer diurnal cycle. In summer, the near-surface air transfers heat to snow/ice in sensible heat flux form (except Dome A) and receives latent heat flux from snow/ice surface. Sensible (Latent) heat flux increases (decreases) with the increasing elevation and distance from the coast, from -4.2 (16.8) W/m2 at Zhongshan to 5.5 (1.2) W/m2 at Dome-A (the summit of the East Antarctic ice sheet). The spatial distribution patterns of surface roughness length, momentum transfer coefficient and friction velocity in summer are similar with wind speed, increasing southward from the East Antarctic coast into the interior escarpment region (strong katabatic wind zone), and then weakening gradually inland. It indicates that these surface dynamical parameters of the Antarctic ice sheet are closely related with wind speed. The results have an important reference value on improving the boundary layer parameterization scheme in Antarctic climate simulation. |
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| Keywords: | Antarctica ice sheet Turbulent fluxes Turbulent parameters Eddy-correlation technique Aerodynamics method |
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