Verification of Convection-Allowing WRF Model Forecasts of the Planetary Boundary Layer Using Sounding Observations

摘要: AbstractThis study evaluates forecasts of thermodynamic variables from five convection-allowing configurations the Weather Research and Forecasting Model (WRF) with Advanced core (WRF-ARW). The vary only in their planetary boundary layer (PBL) scheme, including three “local” schemes [Mellor–Yamada–Janjic (MYJ), quasi-normal scale elimination (QNSE), Mellor–Yamada–Nakanishi–Niino (MYNN)] two that include “nonlocal” mixing [the asymmetric cloud model version 2 (ACM2) Yonei University (YSU) scheme]. are compared to springtime radiosonde observations upstream deep convection gain a better understanding characteristics these PBL this regime. morning PBLs all too cool dry despite having little bias depth (except for YSU). In evening, local produce shallower often shallow moist nonlocal schemes. However, MYNN is nearly unbiased ...