| 冰晶异质核化对雷暴云电过程影响的数值模拟 |
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| 引用本文： | 李璐滢,师正,谭涌波,汪海潮,林晓彤. 冰晶异质核化对雷暴云电过程影响的数值模拟[J]. 热带气象学报, 2021, 37(3): 468-477. DOI: 10.16032/j.issn.1004-4965.2021.045 |
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| 作者姓名： | 李璐滢 师正 谭涌波 汪海潮 林晓彤 |
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| 作者单位： | 南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 |
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| 基金项目： | 国家自然科学基金项目41805002江苏省自然科学基金项目BK2018080江苏省高等学校自然科学研究项目18KJB170010南京信息工程大学人才启动项目2016r042 |
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| 摘 要： | 引入一种新型冰晶异质核化方案,基于二维雷暴云模式,探讨雷暴云电过程对三种异质核化的响应.结果 表明:浸润核化是冰晶生成的最重要异质核化过程,较高数浓度的冰晶消耗雷暴云内液态水含量,抑制淞附过程,导致霰粒子比含水量低,表现为较强的负极性非感应起电率;接触核化生成的冰晶量最少,仅对雷暴云中下层3～5 km处的冰晶有贡献,同...
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| 关 键 词： | 异质核化 冰核 非感应起电 电荷结构 数值模拟 |
| 收稿时间： | 2020-08-15 |
NUMERICAL SIMULATION OF EFFECTS OF HETEROGENEOUS NUCLEATION ON MICROPHYSICAL PROCESS AND ELECTRIFICATION IN THUNDERSTORMS |
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| LI Luying,SHI Zheng,TAN Yongbo,WANG Haichao,LIN Xiaotong. NUMERICAL SIMULATION OF EFFECTS OF HETEROGENEOUS NUCLEATION ON MICROPHYSICAL PROCESS AND ELECTRIFICATION IN THUNDERSTORMS[J]. Journal of Tropical Meteorology, 2021, 37(3): 468-477. DOI: 10.16032/j.issn.1004-4965.2021.045 |
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| Authors: | LI Luying SHI Zheng TAN Yongbo WANG Haichao LIN Xiaotong |
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| Affiliation: | Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | A two-dimensional cumulus model with electrification and lightning process was carried out to investigate the effect of heterogeneous nucleation on microphysical process, electrification and charge structure in thunderstorms. Simulation showed that immersion freezing played a leading role. The high content of ice crystals consumed cloud water, inhibited the growth of graupel, so the mixing ratio of graupel was low and the non-inductive electric rate was the highest. The contact case showed the least amount of ice crystals, which contributed to the middle and lower layers of thunderstorm clouds and low non-inductive charging rate. Besides, the deposition freezing mainly affected the ice crystals at cloud top. In this way, the process of graupel collecting cloud droplets can be more efficient, which resulted in a high mixing ratio of graupel. The charge structure of all cases developed from multipole to dipole, and the secondary positive charge region disappeared quickly with too much or less ice crystals contents at high-temperature regions. |
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| Keywords: | heterogeneous nucleation ice nuclei non-inductive charging charge structure numerical simulations |
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