Estimating numerical errors due to operator splitting in global atmospheric chemistry models: Transport and chemistry

JOURNAL OF COMPUTATIONAL PHYSICS

卷:305

Article

Santillana, Mauricio^1,2  Zhang, Lin³  Yantosca, Robert¹ 

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Boston Childrens Hosp, Computat Hlth Informat Program, Boston, MA 02115 USA

[3] Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Sci, Beijing 100871, Peoples R China

关键词: Atmospheric chemistry;    Operator splitting;    Model verification;    Numerical errors;   

DOI  :  10.1016/j.jcp.2015.10.052

来源: Elsevier

【 摘 要 】

We present upper bounds for the numerical errors introduced when using operator splitting methods to integrate transport and non-linear chemistry processes in global chemical transport models (CTM). We show that (a) operator splitting strategies that evaluate the stiff non-linear chemistry operator at the end of the time step are more accurate, and (b) the results of numerical simulations that use different operator splitting strategies differ by at most 10%, in a prototype one-dimensional non-linear chemistry-transport model. We find similar upper bounds in operator splitting numerical errors in global CTM simulations. (C) 2015 Elsevier Inc. All rights reserved.

【 授权许可】

Free