大气科学学报2025，Vol.48Issue(4)：637-652,16.DOI:10.13878/j.cnki.dqkxxb.20240207001
四川东北部一次强降水过程云微物理方案敏感性试验及与GPM卫星资料的对比分析
Comparative analysis of cloud microphysics scheme sensitivity experiments and GPM satellite data during a heavy rainfall event in northeastern Si-chuan
摘要
Abstract
To investigate the influence of cloud microphysical processes on a heavy rainfall event in the north-eastern Sichuan Basin,sensitivity experiments using different microphysics schemes were conducted with the WRF(weather research and forecasting)model version 4.3,driven by FNL global reanalysis data.The simula-tions focused on a typical rainstorm that occurred from October 4 to 5,2022,and were evaluated against CMPAS(China Meteorological Administration multi-source merged precipitation analysis system)precipitation data and GPM(global precipitation measurement)satellite products.Results indicated that all six microphysics schemes reproduced the general northeast-southwest-oriented distribution of rainfall,although simulated intensities were generally weaker than observed.Among the schemes,Lin and WSM6 produced precipitation centers and spatial patterns most consistent with observations.In terms of cloud structure,simulations using Lin,WSM6,and WDM6 schemes aligned best with cloud distributions captured by GPM.The vertical distributions of cloud water,rainwa-ter,and ice water varied significantly among schemes,contributing to differences in simulated rainfall.Compared with GPM data,the WSM6 and WDM6 schemes demonstrated better vertical correspondence of hydrometeors across different time periods and altitudes.Variations in the formation and growth of snow and graupel also played a critical role in simulation discrepancies,reflecting differences in microphysical structures and the distribu-tion of hydrometeors.The Lin scheme produced the most graupel and the least snow,which may have limited ice-phase precipitation enhancement.In contrast,the CAM scheme lacked graupel,hindering the formation of heavy rainfall,while the Thompson and Morrison schemes simulated only small amounts.The WDM6 scheme showed a precipitation peak near the 0 ℃ layer in the upper warm layer,with a downward decrease in intensity,suggesting weak collision-coalescence processes and significant rainwater evaporation.Overall,the WSM6 scheme produced the most accurate simulation,yielding a more realistic spatial distribution of hydrometeors and closer agreement with observed extreme precipitation.关键词
数值模拟/敏感性试验/云微物理/GPM卫星产品Key words
numerical simulation/sensitivity experiments/cloud microphysics/GPM satellite products引用本文复制引用
刘志,刘卫国,祁红彦..四川东北部一次强降水过程云微物理方案敏感性试验及与GPM卫星资料的对比分析[J].大气科学学报,2025,48(4):637-652,16.基金项目
西南区域人工影响天气能力建设项目(SCIT-ZG(Z)-2024100001) （SCIT-ZG(Z）
高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SC-QXKJYJXZD202407) （SC-QXKJYJXZD202407）
中国气象局-成都信息工程大学人工影响天气联合研究中心开放课题(2024GDRY003) （2024GDRY003）
