A New Algorithm with Square Conservative Exponential Integral for Transport Equation

Author:

Hao Shifeng12,Cui Xiaopeng345,Huang Jianping6

Affiliation:

1. a Zhejiang Meteorological Observatory, Hangzhou, Zhejiang, China

2. b Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu, SiChuan, China

3. c Key Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

4. d Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China

5. e University of Chinese Academy of Sciences, Beijing, China

6. f NOAA/NCEP/Environmental Modeling Center, I. M. System Group, College Park, Maryland

Abstract

AbstractThe square conservative exponential integral method (SCEIM) is proposed for transport problems on the sphere. The method is a combination of the square conservation algorithm and the exponential integral method. The main emphasis in the development of SCEIM is on conservation, positive-definite, and reversibility as well as achieving comparable accuracy to other published schemes. The most significant advantage of SCEIM is to change the forward model to the backward model by setting a negative time step, and the backward model can be used to solve the inverse problem. Moreover, the polar problem is significantly improved by using a simple effective central skip-point difference scheme without major penalty on the overall effectiveness of SCEIM. To demonstrate the effectiveness and generality of the SCEIM, this method is evaluated by standard cosine bell tests and deformational flow tests. The numerical results show that SCEIM is a time-convergence method as well as a grid-convergence method, and has a strong shape-preserving ability. In the tests of the inverse problem, the sharp fronts are successfully regressed back into their initial weak fronts and the cosine bells move against the wind direction and return to the initial position with high accuracy. The numerical results of forward simulations are compared with those of published schemes, the total mass conservation, and error norms are competitive in term of accuracy.

Funder

Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province

the Strategic Priority Research Program of the Chinese Academy of Sciences

Publisher

American Meteorological Society

Subject

Atmospheric Science

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A quadratic conservation algorithm for non‐hydrostatic models;Quarterly Journal of the Royal Meteorological Society;2024-03-05

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