4.3 Article

Three-Dimensional Convective-Stratiform Echo-Type Classification and Convectivity Retrieval from Radar Reflectivity

期刊

JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
卷 39, 期 11, 页码 1685-1704

出版社

AMER METEOROLOGICAL SOC
DOI: 10.1175/JTECH-D-22-0018.1

关键词

Convective clouds; Precipitation; Stratiform clouds; Convective storms; Algorithms; Radars/Radar observations

资金

  1. National Center for Atmospheric Research
  2. National Science Foundation
  3. [1852977]

向作者/读者索取更多资源

The ECCO algorithm identifies convective and stratiform types of radar echo using reflectivity texture, and provides both quantitative and qualitative classifications. It can subclassify echo types and is adaptable to different radar grid characteristics and climatic regions.
The Echo Classification from COnvectivity (ECCO) algorithm identifies convective and stratiform types of radar echo in three dimensions. It is based on the calculation of reflectivity texture -a combination of the intensity and the heterogeneity of the radar echoes on each horizontal plane in a 3D Cartesian volume. Reflectivity texture is translated into convectivity, which is designed to be a quantitative measure of the convective nature of each 3D radar grid point. It ranges from 0 (100% stratiform) to 1 (100% convective). By thresholding convectivity, a more traditional qualitative categorization is obtained, which classifies radar echoes as convective, mixed, or stratiform. In contrast to previous algorithms, these echo-type classifications are provided on the full 3D grid of the reflectivity field. The vertically resolved classifications, in combination with temperature data, allow for subclassifications into shallow, mid-, deep, and elevated convective features, and low, mid-, and high stratiform regions-again in three dimensions. The algorithm was validated using datasets collected over the U.S. Great Plains during the PECAN field campaign. An analysis of lightning counts shows similar to 90% of lightning occurring in regions classified as convective by ECCO. A statistical comparison of ECCO echo types with the well-established GPM radar precipitation-type categories show 84% (88%) of GPM stratiform (convective) echo being classified as stratiform (convective) or mixed by ECCO. ECCO was applied to radar grids for the continental United States, the United Arab Emirates, Australia, and Europe, illustrating its robustness and adaptability to different radar grid characteristics and climatic regions.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据