Review and intercomparison of operational methods for the determination of the mixing height
Review and intercomparison of operational methods for the determination of the mixing height
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DOI：
10.1016/s1352-2310(99)00349-0
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发表时间：
2000
影响因子：
5
通讯作者：
P. Seibert;F. Beyrich;S. Gryning;S. Joffre;A. Rasmussen;P. Tercier
中科院分区：
文献类型：
--
作者：
P. Seibert;F. Beyrich;S. Gryning;S. Joffre;A. Rasmussen;P. Tercier
大气边界层高度（ABL）或混合高度（MH）是表征对流层低层结构的基本参数。实际确定 MH 的两种基本可能性是从剖面数据（测量或数值模型输出）推导，以及使用简单方程或模型（仅需要几个测量输入值）进行参数化。本文回顾了文献中提出的不同方法。最重要的方法已经在欧洲三个不同地点（Cabauw – NL、Payerne – CH、Melpitz – D）的数据集上进行了测试。研究了应用于无线电探空仪剖面的包裹数和理查森数方法以及声雷达和风廓线仪数据的分析。目前使用的五个用于分散模型的气象预处理器中实施的 MH 测定模块也已经过测试。使用修正的超温系数的地块方法和使用表面超温的理查森数方法在对流条件下效果很好。在稳定条件下，固有的困难需要结合多种方法（例如桅杆和声雷达）。所有测试的参数化方案在某些条件下都表现出缺陷，因此需要更灵活的算法来考虑变化的和非经典的条件。就轮廓测量分析以及参数化和简单模型的使用提出了建议，并提出了预处理器开发和未来研究活动的建议。
The height of the atmospheric boundary layer (ABL) or the mixing height (MH) is a fundamental parameter characterising the structure of the lower troposphere. Two basic possibilities for the practical determination of the MH are its derivation from profile data (measurements or numerical model output) and its parameterisation using simple equations or models (which only need a few measured input values). Different methods suggested in the literature are reviewed in this paper. The most important methods have been tested on data sets from three different sites in Europe (Cabauw – NL, Payerne – CH, Melpitz – D). Parcel and Richardson number methods applied to radiosonde profiles and the analysis of sodar and wind profiler data have been investigated. Modules for MH determination implemented in five currently used meteorological preprocessors for dispersion models have been tested, too. Parcel methods using a revised coefficient for the excess temperature and Richardson number methods using a surface excess temperature worked well under convective conditions. Under stable conditions, the inherent difficulties call for a combination of several methods (e.g., mast and sodar). All the tested parameterisation schemes showed deficiencies under certain conditions, thus requiring more flexible algorithms able to take into account changing and non-classical conditions. Recommendations are formulated regarding both the analysis of profile measurements and the use of parameterisations and simple models, and suggestions for the preprocessor development and for future research activities are presented.