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首页> 外文期刊>Journal of the Atmospheric Sciences >A microphysical bulk formulation based on scaling normalization of the particle size distribution. Part I: Description
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A microphysical bulk formulation based on scaling normalization of the particle size distribution. Part I: Description

机译：基于粒度分布的按比例归一化的微物理本体配方。第一部分：说明

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摘要

The authors address the problem of optimization of the microphysical information extracted from a simulation system composed of high-resolution numerical models and multiparameter radar data or other available measurements. As a tool in the exploration of this question, a bulk microphysical scheme based on the general approach of scaling normalization of particle size distribution (PSD) is proposed. This approach does not rely on a particular functional form imposed on the PSD and naturally leads to power-law relationships between the PSD moments providing an accurate and compact PSD representation. To take into account the possible evolution of the shape/curvature of the distribution, ignored within standard one-and two-moment microphysical schemes, a new three-moment scheme based on the two-moment scaling normalization is proposed. The methodology of the moment retrieval included in the three-moment scheme can also be useful as a retrieval algorithm combining different remote sensing observations. The developed bulk microphysical scheme presents a unified formulation for microphysical parameterization using one, two, or three independent moments, suitable in the context of data assimilation. The effectiveness of the scheme with different combinations of independent moments is evaluated by comparison with a very high resolution spectral model within a 1D framework on representative microphysical processes: rain sedimentation and evaporation.
机译：作者解决了从由高分辨率数值模型和多参数雷达数据或其他可用测量组成的仿真系统中提取的微物理信息的优化问题。作为探索该问题的工具，提出了一种基于粒度分布（PSD）缩放归一化的通用方法的体微物理方案。这种方法不依赖于施加在PSD上的特定功能形式，并且自然导致PSD矩之间的幂律关系，从而提供了精确而紧凑的PSD表示。考虑到分布的形状/曲率的可能演变，在标准的一阶和二阶微物理方案中被忽略，提出了一种基于二阶缩放归一化的新的三阶方案。三矩方案中包含的矩检索方法也可以用作结合不同遥感观测结果的检索算法。所开发的整体微物理方案提出了一个统一的公式，用于使用一个，两个或三个独立的时刻进行微物理参数化，适用于数据同化的情况。通过与一维框架内的代表性微物理过程（雨水沉降和蒸发）的高分辨率光谱模型进行比较，评估了具有不同独立矩组合的方案的有效性。

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