大气边界层热量输送的非局地多尺度湍流理论及试验研究

朱蓉; 徐大海

大气边界层热量输送的非局地多尺度湍流理论及试验研究

朱蓉,
徐大海

中国气象科学研究院, 北京100081

资助项目:

国家973“我国重大天气灾害形成机理和预测理论研究” 973-06-02

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出版历程
- 收稿日期: 2004-02-15
- 修回日期: 2004-05-18
- 刊出日期: 2005-06-30

THEORY ON NON-LOCAL MULTI-SCALE TURBULENCE FOR BOUNDARY-LAYER HEAT TRANSPORT WITH ITS EXPERIMENT

Zhu Rong,
Xu Dahai

Chinese Academy of Meteorological Sciences, Beijing 100081

摘要

摘要: 该文在大气边界层多尺度湍流理论和湍流穿越理论的基础上，建立了大气边界层感热通量的非局地多尺度湍流计算方法，并选用1998年5～8月份第二次青藏高原大气科学试验（TIPEX）的大气边界层综合观测基地昌都站观测资料，分别用感热通量的非局地多尺度湍流计算方法和经典相似理论计算感热通量。对计算结果的对比分析表明，用感热通量的非局地多尺度湍流计算方法能计算出感热通量的逆梯度输送，也能计算出青藏高原近中性层结条件下明显的感热通量。此外，多尺度湍流理论还有待进一步发展完善，提高感热通量的计算精度。
- 大气边界层;
- 多尺度湍流理论;
- 湍流穿越理论;
- 相似理论;
- 感热通量
Abstract: Following theories on multi-scale turbulence and transilient turbulence in the atmospheric boundary layer, a method is developed for non-local multi-scale turbulence for sensible heat flux and using data from Changdu station as the base for all-item observations in the second Tibetan Plateau Experiment (TIPEX) from May to August, 1998, sensible fluxes are calculated by means of a technique for non-local multi-scale turbulence and a classic similarity scheme separately. Analysis of the calculations shows that the first method is responsible for the upgradient transport of sensible heat and for the higher fluxes in the near-neutral stratification over the Plateau. Besides, the multi-scale theory needs further improvement in an effort to raise the precision of the calculations.
- Atmospheric boundary layer;
- Multi-scale turbulent theory;
- Transilient turbulent theory;
- The similarity theory of atmospheric turbulence;
- Sensible heat flux

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图 1 非局地多尺度湍流的计算值与昌都观测值的相关

(R=0.90, n=274, y=1.06 x +1.23)

下载: 全尺寸图片幻灯片

图 2 经典相似理论的计算值与昌都观测值的相关

(R=0.895, n=185, y=0.81 x +3.65)

下载: 全尺寸图片幻灯片

图 3 1998年5月昌都近地面层湍流热通量计算值与观测值的比较

下载: 全尺寸图片幻灯片

表 1 1998年5月昌都站观测到热量逆梯度输送时多尺度湍流理论与经典相似理论的计算结果

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