CAJ | 학술논문

在气候变化数值模拟工作中，气候数值模式运行效率主要受到计算效率和I/O效率的共同影响。目前，模式计算部分已经基本实现并行，计算效率显著提升。随着气候数值模式时空分辨率的提高，对I/O效率的需求也不断增加，数据并行I/O技术已经成为提高模式整体运行效率的有效方法之一。文中深入分析了BCC AGCM模式串行I/O算法及NetC-DF数据结构特点，采用基于MPI-IO的高层I/O库对模式I/O算法进行并行优化，优化后可支持多类气象要素并行输出，输出效率明显提升。为我国应对气候变化数值模式的运行效率优化工作，进行了有益的技术探索和积累。
재기후변화수치모의공작중，기후수치모식운행효솔주요수도계산효솔화I/O효솔적공동영향。목전，모식계산부분이경기본실현병행，계산효솔현저제승。수착기후수치모식시공분변솔적제고，대I/O효솔적수구야불단증가，수거병행I/O기술이경성위제고모식정체운행효솔적유효방법지일。문중심입분석료BCC AGCM모식천행I/O산법급NetC-DF수거결구특점，채용기우MPI-IO적고층I/O고대모식I/O산법진행병행우화，우화후가지지다류기상요소병행수출，수출효솔명현제승。위아국응대기후변화수치모식적운행효솔우화공작，진행료유익적기술탐색화적루。
Computational efficiency and I/O efficiency affect the efficiency of numerical climate model together in climate change numeri-cal simulation. Model computation section has been parallelized and the efficiency significantly increased. With the improvement of spatial and temporal resolution of numerical climate model,the demand of data access efficiency is also increased dramatically. The parallel I/O technology has become an effective method to improve the efficiency of numerical climate model. In this paper,analyze the serial I/O al-gorithm of BCC AGCM mode and the data structure features of NetCDF. Use high level I/O library based on MPI-IO to optimize model data interface,the new system can support parallel output of multiple meteorological elements and data output efficiency has improved sig-nificantly. Carry out useful technical exploration and accumulation for the efficiency optimization of numerical climate model.