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공공누리This item is licensed Korea Open Government License

Title
An Evaluation of the Software System Dependency of a Global Atmospheric Model
Author(s)
홍성유강지훈조민수
Publication Year
2013-11-01
Abstract
This study presents the dependency of the simulation results from a global atmospheric numerical model on machines with different hardware and software systems. The global model program (GMP) of the Global/Regional Integrated Model system (GRIMs) is tested on 10 different computer systems having different central processing unit (CPU) architectures or compilers. There exist differences in the results for different compilers, parallel libraries, and optimization levels, primarily due to the treatment of rounding errors by the different software systems. The system dependency, which is the standard deviation of the 500-hPa geopotential height averaged over the globe, increases with time. However, its fractional tendency, which is the change of the standard deviation relative to the value itself, remains nearly zero with time. In a seasonal prediction framework, the ensemble spread due to the differences in software system is comparable to the ensemble spread due to the differences in initial conditions that is used for the traditional ensemble forecasting.
Keyword
Software system dependency; compiler; atmospheric model; round-offerror; GRIMs
Journal Title
Monthly weather review
ISSN
0027-0644
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14127
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=NART68238814
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