CAIMANs studies the impact of passenger maritime traffic on air quality in five important port cities in the northen Mediterranean: Barcelona, Marseilles, Genoa, Venice and Thessaloniki. It expands its analysis on the whole Mediterranean area, trough a participatory consulation towards other port cities, including southern Mediterranean coasts.CAIMANs aim to pave the way for a joint policy response on the air pollution impact due to the tourist sector of cruise and passenger ship in the Mediterranean basin in order to reach an integrated approch concerning the mitigation of environmental risks (Integrated Maritime Policy for the Mediterranean) Expected Results: • AIR POLLUTANT PASSENGER SHIPS EMISSIONS DATABASES &CONCENTRATION MAPS FOR AIR POLLUTANTS EMITTED BY THOSE SHIPS FOR PRESENT AND FUTURE MITIGATION SCENARIOSEstimations of air pollutant emissions by passenger ships (European reference methodology—EMEP/EEA, 2013), based on passenger ship movements of 2013 in each CAIMANs pilot harbor, considering for years2020 or 2025 both midterm developmentsand possible mitigation scenarios (on-shore Power Supply, terminals displacement, fleet conversion to LNG fuel). Estimation of air pollutant concentrations in each local domain around the harbors, considering the previous listed emission scenarios, using high resolution dispersion models. Computing and mapping of statistics for each pollutant (yearly averages, daily or hourly percentiles) related to the Air Quality Limits (EU Legislation—AQD 2008/50/EC).• POPULATION EXPOSURE MAPS OF AIR POLLUTANT CONCENTRATIONS DUE TO PASSENGER SHIP TRAFFIC FOR PRESENT AND FUTURE MITIGATION SCENARIOS Population living in the harbor cities where air pollutant concentrations due to passenger ships exceed various percentages of the Air Quality limits set by the European Legislation (AQD 2008/50/EC).• CREATING A STAKEHOLDERS-PROVIDERS NETWORK IN THE MEDITERRANEAN BASIN INVOLVING PORT AUTHORITIES AND INSTITUTION IN CHARGE OF AIR QUALITY MANAGEMENT THROUGH A CONSULTATIVE PARTICIPATION SURVEY Questionnaire aimed at studying local Med stakeholders’ involvements in the actions carried on and proposed by the project. It focused on: (1) the state of implementation of air pollution monitoring and management integrated tools, (2) local interests and expectations towards policies and funding opportunities to be addressed and promoted at local and/or transnational scale for the mitigation of air quality impact of maritime passenger traffic. This led to the obtaining of a stakeholders-provider network and a complete database. • IDENTIFYING RELEVANT ISSUES TO NORTHERN AND SOUTHERN MED PORTS WITH REGARD TO ACTIONS/MEASURES; PLANNING POLICIES FOR THE MITIGATION OF MARITIME TRAFFIC AIR QUALITY IMPACT Tables, graphs and maps reporting the analysis of data collected through the above-mentioned questionnaire. Identification of the most relevant issues, gaps and critical end points, showing common and transnational aspects that still need to be analyzed, and suggesting directions for further development and improvement of the work done within the CAIMANs project.