Hurricane Dorian Outer Rain Band Observations and 1D Particle Model Simulations: A Case Study

摘要: The availability of high quality surface observations precipitation and volume by polarimetric operational radars make it possible to constrain, evaluate, validate numerical models with a wide variety microphysical schemes. In this article, novel particle-based Monte-Carlo model (called McSnow) is used simulate the outer rain bands Hurricane Dorian which traversed densely instrumented research facility operated NASA at Wallops Island, Virginia. showed steady stratiform vertical profiles radar signature dendritic growth layers near −15 °C peak reflectivity in bright band 55 dBZ along signatures wet snow sizes inferred exceed 15 mm. A 2D-video disdrometer measured frequent occurrences large drops >5 mm combined an optical array probe drop size distribution was well-documented spite uncertainty for <0.5 due wind gusts turbulence. 1D McSnow control run four experiments were conducted compared observations. One main findings that even moderate rate 10 mm/h collisional breakup essential shape distribution.