A Revised Scheme for the WRF Surface Layer Formulation

作者：Pedro A. Jiménez, Jimy Dudhia, Jesús Fidel González-Rouco, Jorge Navarro, Juan Pedro Montávez, Elena García‐Bustamante · 发表于：Monthly Weather Review · 年份：2011 · DOI：10.1175/mwr-d-11-00056.1 · 被引用次数：2010 · 研究领域：Meteorological Phenomena and Simulations、Climate variability and models、Atmospheric aerosols and clouds

Abstract This study summarizes the revision performed on the surface layer formulation of the Weather Research and Forecasting (WRF) model. A first set of modifications are introduced to provide more suitable similarity functions to simulate the surface layer evolution under strong stable/unstable conditions. A second set of changes are incorporated to reduce or suppress the limits that are imposed on certain variables in order to avoid undesired effects (e.g., a lower limit in u*). The changes introduced lead to a more consistent surface layer formulation that covers the full range of atmospheric stabilities. The turbulent fluxes are more (less) efficient during the day (night) in the revised scheme and produce a sharper afternoon transition that shows the largest impacts in the planetary boundary layer meteorological variables. The most important impacts in the near-surface diagnostic variables are analyzed and compared with observations from a mesoscale network.