Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0268.1 |
Bin-Emulating Hail Melting in Three-Moment Bulk Microphysics | |
Mansell, Edward R.; Dawson II, Daniel T.; Straka, Jerry M. | |
2020-10-01 | |
发表期刊 | Journal of the Atmospheric Sciences |
出版年 | 2020 |
英文摘要 | A three-moment bulk microphysics scheme is modified to treat melting in a size-dependent manner that emulates results from a spectral bin scheme. The three-moment bulk framework allows the distribution shape to change and accommodate some direct effects of melting on both the hail and raindrop size distributions. Reflectivity changes and shed raindrop sizes are calculated over discrete size ranges of the hail particle spectrum. Smaller ice particles are treated as melting into drops of the same mass, whereas large particles shed drops as they melt. As small ice particles are lost, the size spectrum naturally becomes narrower and the mean size of small hail can increase. Large hail with a narrow spectrum, however, can decrease in size from melting. A substantial effect is seen on the rain median volume diameter when small drops are shed from large melting hail. The NSSL bulk scheme is compared with bin microphysics in steady-state hail shafts and in a supercell storm case. It is also shown that melting (or any substantial removal of mass) induces gravitational size sorting in bulk microphysics to increase hail size despite the design of the process rates to maintain the mean size of the melting ice. This unintended side effect can be a correct behavior for small hail, but not for large hail with a narrow distribution, when mean hail size should decrease by melting. |
领域 | 地球科学 ; 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297880 |
专题 | 地球科学 气候变化 |
推荐引用方式 GB/T 7714 | Mansell, Edward R.,Dawson II, Daniel T.,Straka, Jerry M.. Bin-Emulating Hail Melting in Three-Moment Bulk Microphysics[J]. Journal of the Atmospheric Sciences,2020. |
APA | Mansell, Edward R.,Dawson II, Daniel T.,&Straka, Jerry M..(2020).Bin-Emulating Hail Melting in Three-Moment Bulk Microphysics.Journal of the Atmospheric Sciences. |
MLA | Mansell, Edward R.,et al."Bin-Emulating Hail Melting in Three-Moment Bulk Microphysics".Journal of the Atmospheric Sciences (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论