Plateau Meteorology

Plateau Meteorology >

2015 , Vol. 34 >Issue 1: 21 - 29

DOI: https://doi.org/10.7522/j.issn.1000-0534.2013.00170

Characteristics of Turbulence Transfer in Surface Layer over Semi-Arid Grassland in Loess Plateau in Summer

  • YUE Ping ,
  • ZHANG Qiang ,
  • ZHAO Wen ,
  • WANG Sheng ,
  • SHI Jinseng ,
  • WANG Ruoan
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  • Key Laboratory of Arid Climatic Change and Reducing Deserter of Gansu Province, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China;2. Zhangye National Climatological Observatory, Zhangye 734000, China;3. College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China

Received date: 2012-11-20

  Online published: 2015-02-28

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Abstract

The turbulent data observed at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) in sunny days over semi-arid grassland in the Loess Plateau from June to August 2008 were used to investigate the relation between dimensionless turbulent wind variance and stability parameter (Z/L) and the turbulence transfer characteristics. The results shows that the wind components spectra computed by the Fast Fourier technique were satisfactory the Kolmogorov similarity hypothesis. The average actual evapotranspiration in sunny days is 1.9 mm when the daily mean soil humidity at 5 cm is about 15%, the moisture flux is greater than zero and a maximum of 0.063 g·m-2·s-1. Under the convective condition, the stability parameters (Z/L) dependence on the variance of dimensionless temperature and specific humidity can be fit to a power law with an index of -1/3. The dynamical and thermal-dynamical roughness length over Loess Plateau semi-arid grassland is 6.6×10-3 m and 1.85×10-5 m. The bulk transfer coefficient CD and CH are 4.4×10-3 and 3.9×10-3 under unstable stratification; CD and CH are 4.2×10-3 and 2.8×10-3 under the near neutral stratified condition; CD and CH are 3.1×10-3 and 2.1×10-3 under stable stratification.

Key words： Loess Plateau; Turbulent characteri; Roughness length; Bulk transfer coeffi

Cite this article

YUE Ping , ZHANG Qiang , ZHAO Wen , WANG Sheng , SHI Jinseng , WANG Ruoan . Characteristics of Turbulence Transfer in Surface Layer over Semi-Arid Grassland in Loess Plateau in Summer[J]. Plateau Meteorology, 2015 , 34(1) : 21 -29 . DOI: 10.7522/j.issn.1000-0534.2013.00170

References

[1]王介民, 刘晓虎, 祁永强. 应用涡旋相关方法对戈壁地区湍流输送特征的初步研究[J]. 高原气象, 1990, 9(2): 120-129.
[2]杨长新. 边界层气象学导论[M]. 北京: 气象出版社, 1991, 32.
[3]刘树华, 李洁, 刘和平, 等. 在EBEX-2000实验资料中的湍流宏观量特征[J]. 大气科学, 2005, 29(4): 503-509.
[4]Panofsky H A, Dutton J A. Atmospheric Turblance[M]. New York: John Wiley and Sons, 1984: 397.
[5]Nieuwstadt F T M. The turblence structure of stable, nocturnal boundary layer[J]. J Atmos Sci, 1984, 41: 2202-2216.
[6]Sorbjan Z. An examination of local similarity theory in the stable stratified boundary layer[J]. Bound-Layer Meteor, 1987, 38: 63-71.
[7]刘辉志, 洪钟祥. 青藏高原改则地区近地层湍流特征[J]. 大气科学, 2000, 24(3): 289-299.
[8]刘树华, 刘和平, 李洁, 等. 在EBEX-2000实验资料中湍流耗散率、长度尺度和结构参数特征[J]. 大气科学, 2005, 29(3): 475-481.
[9]Kaimal J C, Wyngaard J C. The Kansas and Minnesota experiments[J]. Bound-Layer Meteor, 1990, 50: 31-47.
[10]Kaimal J C. Turbulence spectra, length scales, and structure parameters in the stable surface layer[J]. Bound-Layer Meteor., 1973, 4: 289-309.
[11]Li Jie, Liu S H, Liu H P, et al. Surface imbalance energy calculated and analyzed with the data of EBEX-2000[J]. Acta Meteor Sini, 2003, 17: 448-464.
[12]胡隐樵, 高由禧, 王介民, 等. 黑河试验(HEIFE)的一些研究成果[J]. 高原气象, 1994, 13(3): 225-236.
[13]胡隐樵, 高由禧. 黑河实验(HEIFE)——对干旱地区陆面过程的一些新认识[J]. 气象学报, 1994, 52(3): 285-296.
[14]徐安伦, 李建, 孙绩华, 等. 青藏高原东南缘大理地区近地层微气象特征及能量交换分析[J]. 高原气象, 2013, 32(1): 9-22, doi: 10.7522/j.issn.1000-0534.2013.00002.
[15]陈继伟, 左洪超, 王介民, 等. LAS在西北干旱区荒漠均匀下垫面的观测研究[J]. 高原气象, 2013, 32(1): 56-64, doi: 10.7522/j.issn.1000-0534.2013.00007.
[16]庄金鑫, 王维真, 王介民. 涡动相关通量计算及三种主要软件的比较分析[J]. 高原气象, 2013, 32(1): 78-87, doi: 10.7522/j.issn.1000-0534.2013.00009.
[17]吕少宁, 文军, 张宇, 等. 不同平均时间对LOPEX10资料涡动相关湍流通量计算结果影响的探讨[J]. 高原气象, 2012, 31(6): 1530-1538.
[18]王超, 韦志刚, 高晓清, 等. 夏季敦煌稀疏植被下垫面物质和能量交换的观测研究[J]. 高原气象, 2012, 31(3): 622-628.
[19]曾剑, 张强. 2008年夏季中国干旱—半干旱区陆面主要物理参数的平均特征[J]. 高原气象, 2012, 31(6): 1539-1550.
[20]张强, 王胜. 关于黄土高原陆面过程及其观测试验研究[J]. 地球科学进展, 2008, 23(2): 167-173.
[21]Huang Jianping, Zhang Wu, Zuo Jinqing, et al. An overview of the semi-arid climate and environment research observatory over the loess plateau[J]. Adv Atmos Sci, 2008, 25(6): 906-921.
[22]张强, 胡向军, 王胜, 等. 黄土高原陆面过程试验研究(LOPEX)有关科学问题[J]. 地球科学展, 2009, 24(4): 363-371.
[23]Yue P, Li Y H, Zhang Q, et al. Surface energy-balance closure in a gully region of the Loess Plateau at SACOL on eastern Edge of Tibetan Plateau[J]. J Meteor Soc Japan, 2012, 90: 173-184.
[24]陈家宜, 王介民, 田光宁. 一种确定粗糙度的独立方法[J]. 大气科学, 1993, 17(1): 89-93.
[25]Ma Y, Tsukamoto O, Wang J, et al. Analysis of aerodynamic and thermodynamic parameters on the grassy marshland surface of Tibetan Plateau[J]. Progress in Natural Science, 2002, 12: 36-40.
[26]Monin A S, Obukhov A M. Basic laws of turbulent mixing in the surface layer of the atmosphere[J]. Tr. Akad. Nauk. SSSR Geophiz. Inst., 1954, 24(151): 163-187.
[27]Zhang Qiang, Huang Ronghui, Tian Hui. A parameterization scheme of surface turbulent momentum and sensible heat over the Gobi underlying surface[J]. Adv Atmos Sci, 2003, 20(1): 111-118.
[28]涂钢. 半干旱区不同下垫面地气相互作用研究[D]. 北京: 中国科学院大气物理研究所, 2007, 109-112.
[29]Wyngaard J C, Cote O R. The budgets of turbulent kinetic energy and temperature variance in the atmospheric surface layer[J]. J Atmos Soc, 1971, 28: 190-201.
[30]周明煜, 徐祥德, 卞林根, 等. 青藏高原大气边界层观测分析与动力学研究[M]. 北京: 气象出版社, 2000, 44.
[31]Hogstrom U, Semdwan-Hogstrom A S. Turbulence mechanics at an agricultural site[J]. Bound-Layer Meteor, 1974, 7: 373-389.
[32]李国平, 段延扬, 巩远发. 青藏高原西部地区的总体输送系数和地面通量[J]. 科学通报, 2000, 45(8): 865-869.
[33]李家伦, 洪钟祥, 罗卫东, 等. 青藏高原改则地区近地层通量观测研究[J]. 大气科学, 1999, 23(2): 142-151.
[34]张强, 卫国安, 黄荣辉. 西北干旱区荒漠戈壁动量和感热总体输送系数[J]. 中国科学(D辑), 2001, 31(9): 783-792.
[35]左洪超, 胡隐樵. 黑河实验区沙漠和戈壁的总体输送系数[J]. 高原气象, 1992, 11: 371-380.
[36]王慧, 胡泽勇, 谷良雷, 等. 黑河下游鼎新戈壁近地层能量输送及微气象特征[J]. 高原气象, 2007, 26(5): 938-945.
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