Research On Application Of Parallel Computation To Marine Water Quality Forecast System Of Jiaozhou Bay

The core mission of the marine water quality forecasting system (MWQFS) is to predict rapidly and accurately the future marine environment.Along with the development of operational oceanography, the processes included in MWQFS tends to be more complete and complex. As a result, the computation consumption becomes much huger. The traditional MWQFS based on serial program which can only runs in single processor gradually cannot satisfy the computation task.The helpful solution is to use establish the forecasting system based on parallel program.In this thesis, the Message Passing Interface technology was applied to the water quality module of Jiaozhou Bay MWQFS, to improve the computation efficiency. The content is as follows:1. Expoude the structure of MWQFS of Jiaozhou Bay, analyzed the design proposal and codes of water quality mode, and put forward a method of subrange division in parallel mode.2. Process the serial program in parallel with polymerization communication technology and non-blocking communication technology, and edit relevant codes. From the view of the code realization, the polymerization communication mode is easy to edit codes and avoid deadlock, but couldn’t fully meet the synchronization of communication and computing time. On-blocking communication mode could fully meet the synchronization of communication and computing time, but code editing is complex.3. Test and evaluate the performance of the parallel program. with the polymerization communication mode, the running time of the system can be shortened29%than the serial program, and the parallel efficiency can be up to55%; with the non-blocking communication mode, the running time of the system can be shortened35%than the serial program, and the parallel efficiency can be up to88%.Therefore, non-blocking communication has a great advantage in the parallel improvement.The water quality forecast system of Jiaozhou Bay should use the non-blocking communication to realize the parallelism, so as to shorten the running time greatly and improve the forecasting capability of water quality forecasting system effectively.