Quality management system and design of an integrated mesoscale meteorological network in Central Italy

The current evolution of numerical weather prediction models, climate applications, warning and decision support systems needs more information at increasingly finer scales. In this context, mesoscale meteorological networks (mesonets) can provide essential observations for the international community. However, they often suffer from the absence of a national and international coordination, scarce maintenance, inadequate data quality and redundancy. An integrated network design and the implementation of a unified quality management system could reveal the full socio-economical benefits of mesonet information. This study provides a general procedure to realize an efficient and high-quality mesonet starting from existing fragmented networks. The process starts by defining a network quality management system (NQMS), which is responsible for the station maintenance and the data quality control (QC) procedures. Stations are first classified based on their primary purpose, their landscape and the instruments siting and exposure in the station enclosure. Then, their quality performances are evaluated by a complex QC system made by numerous QC tests, whose specifications are tailored to the main surface observations. Finally, an integrated network design procedure is provided to identify observational lack and planning site interventions. The design is based on the purpose of the network and all the information gathered by the NQMS. Spatial, meteorological, climate and financial considerations are then used to decide whether to add, remove or modify observations. This procedure is tested in the Umbria region, Central Italy, where its implementation would lead to a considerable advancement in terms of regional weather and climate services.