气候变化领域集成服务门户(CCPortal): Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models

CCPortal

DOI	10.1029/2019MS001621
	Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models
	Pincus R.; Mlawer E.J.; Delamere J.S.
发表日期	2019
ISSN	19422466
起始页码	3074
结束页码	3089
卷号	11 期号:10
英文摘要	This paper describes the initial implementation of a new toolbox that seeks to balance accuracy, efficiency, and flexibility in radiation calculations for dynamical models. The toolbox consists of two related code bases: Radiative Transfer for Energetics (RTE), which computes fluxes given a radiative transfer problem defined in terms of optical properties, boundary conditions, and source functions; and RRTM for General circulation model applications—Parallel (RRTMGP), which combines data and algorithms to map a physical description of the gaseous atmosphere into such a radiative transfer problem. The toolbox is an implementation of well-established ideas, including the use of a k-distribution to represent the spectral variation of absorption by gases and the use of two-stream, plane-parallel methods for solving the radiative transfer equation. The focus is instead on accuracy, by basing the k-distribution on state-of-the-art spectroscopy and on the sometimes-conflicting goals of flexibility and efficiency. Flexibility is facilitated by making extensive use of computational objects encompassing code and data, the latter provisioned at runtime and potentially tailored to specific problems. The computational objects provide robust access to a set of high-efficiency computational kernels that can be adapted to new computational environments. Accuracy is obtained by careful choice of algorithms and through tuning and validation of the k-distribution against benchmark calculations. Flexibility with respect to the host model implies user responsibility for maps between clouds and aerosols and the radiative transfer problem, although comprehensive examples are provided for clouds. © 2019. The Authors.
英文关键词	atmospheric model; parameterization; radiation
语种	英语
scopus关键词	Efficiency; Heat radiation; Optical properties; Parameterization; Radiative transfer; Atmospheric model; Benchmark calculations; Computational environments; Computational kernels; General circulation model; Radiation calculations; Radiative transfer equations; Radiative transfer problems; Computational efficiency; absorption; accuracy assessment; atmospheric modeling; cloud; computer simulation; parameterization; radiative transfer; solar radiation
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156855
作者单位	Cooperative Institute for Environmental Studies, University of Colorado Boulder, Boulder, CO, United States; Physical Sciences Division, NOAA/Earth System Research Lab, Boulder, CO, United States; Atmospheric and Environmental Research, Lexington, MA, United States; Alpenglow Scientific, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Pincus R.,Mlawer E.J.,Delamere J.S.. Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models[J],2019,11(10).
APA	Pincus R.,Mlawer E.J.,&Delamere J.S..(2019).Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models.Journal of Advances in Modeling Earth Systems,11(10).
MLA	Pincus R.,et al."Balancing Accuracy, Efficiency, and Flexibility in Radiation Calculations for Dynamical Models".Journal of Advances in Modeling Earth Systems 11.10(2019).