文献类型：期刊文献

英文题名：Extension and Evaluation of University of Washington Moist Turbulence Scheme to Gray-Zone Scales

作者：Wei, Wei[1,2];Peng, Xindong[1,2];Lin, Yanluan[3];Li, Jianduo[1,2];Zhang, Guo[1,2];Yang, Yang[4];Long, Jingchao[5]

机构：[1]CMA Earth Syst Modeling & Predict Ctr, Beijing, Peoples R China;[2]Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China;[3]Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China;[4]China Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China;[5]Guangdong Ocean Univ, Coll Ocean & Meteorol, South China Sea Inst Marine & Meteorol, Zhanjiang, Peoples R China

年份：2022

卷号：14

期号：8

外文期刊名：JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS

收录：SCI-EXPANDED(收录号：WOS:000842772800001)、、EI(收录号：20223512673798)、WOS

基金：This study was jointly supported by the National Key R&D Program of China (Grant Nos. 2018YFC1507003 and 2018YFC1505704) and National Natural Science Foundation of China (Grant Nos. 42075151, 41875123 and 41905006). The authors are grateful to Dr. Bowen Zhou of Nanjing University for providing a fundamental review that led to substantial improvements in the manuscript. We also thank the other two anonymous reviewers for their insightful comments.

语种：英文

外文关键词：gray zone; convective boundary layer; scale-awareness; planetary boundary layer parameterization; sub-grid turbulence

外文摘要：With the rapid improvement in computational resources, it has become possible to structure numerical weather model simulations to use sub-kilometer grid spacing. Traditional turbulence-mixing closures have become obsolete within the context of the gray zone of turbulence. Here, a new scale-aware algorithm (SA-UW) is developed based on the UW (University of Washington Moist Turbulence) scheme. By dividing both the local and nonlocal vertical turbulence flux into sub-grid and resolved parts, the partition of sub-grid turbulence is tuned by a set of well-acknowledged scale-dependent relationships. Idealized simulations confirm that the newly developed scheme can adequately reproduce sub-grid turbulence transport at gray-zone scales. The inclusion of a nonlocal transport term in the SA-UW scheme is essential, as it vastly improves the distribution and intensity of coherent structures. The SA-UW scheme recovers the conventional UW scheme when grid spacing is larger than the turbulence length scale, thereby evincing the sale-aware capability of the new method. For real-case simulations, the SA-UW scheme can capture the diurnal cycle and provide a more accurate vertical structure of temperature and humidity.