M3A system (2000–2005) – operation and maintenance

[摘要] During the pilot phase of the Mediterranean Forecasting System (MFSPP) (20002003), a prototype observing system (Mediterranean Moored Multi-sensor Array– M3A) was designed, developed and operated in the Cretan Sea for continuousoceanographic measurements in real time. The main problems encountered wereassociated with biofouling, underwater and aerial communication and with thedesign of the surface buoy. In the second phase of the MFS project namedMediterranean Forecasting System Towards Environmental Predictions (MFSTEP)(2003–2005), the aim was to solve those problems and to consolidate theM3A. For the minimisation of biofouling a pilot field study was performedand the techniques of bromine solution and copper shielding were evaluated.Additionally, the oligotrophy of the Aegean Sea dictated the need to ignorefactory calibrations and to perform site-specific laboratory calibrations ofthe sensors. This procedure was proved necessary and produced calibrationcoefficients that gave results comparable to the measurements obtained withthe laboratory analysis method. During the approximately five years ofoperation, there were 13 scheduled and 15 emergency visits, with a totalduration of 65 days. The acquired experience through the maintenance programproved that the continuous observation of such a very important system with arelative low cost is feasible.

[学科分类] 海洋学与技术