期刊
GEOSCIENTIFIC MODEL DEVELOPMENT
卷 8, 期 10, 页码 3247-3255出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/gmd-8-3247-2015
关键词
-
资金
- JSPS (the Japan Society for the Promotion of Science) [23226012, 26289160]
- Supercomputing Center/Korea Institute of Science and Technology Information [KSC-2014-C1-041]
- Grants-in-Aid for Scientific Research [26289160, 23226012] Funding Source: KAKEN
In this study, the non-iteration dimensional-split semi-Lagrangian (NDSL) advection scheme is applied to the National Centers for Environmental Prediction (NCEP) Regional Spectral Model (RSM) to alleviate the Gibbs phenomenon. The Gibbs phenomenon is a problem wherein negative values of positive-definite quantities (e.g., moisture and tracers) are generated by the spectral space transformation in a spectral model system. To solve this problem, the spectral prognostic specific humidity and radioactive tracer advection scheme is replaced by the NDSL advection scheme, which considers advection of tracers in a grid system without spectral space transformations. A regional version of the NDSL is developed in this study and is applied to the RSM. Idealized experiments show that the regional version of the NDSL is successful. The model runs for an actual case study suggest that the NDSL can successfully advect radioactive tracers (iodine-131 and cesium-137) without noise from the Gibbs phenomenon. The NDSL can also remove negative specific humidity values produced in spectral calculations without losing detailed features.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据