{"type": "FeatureCollection", "features": [{"id": "10.1016/j.scitotenv.2022.161255", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:16:53Z", "type": "Journal Article", "created": "2022-12-31", "title": "Exploration of occurrence and sources of microplastics (>10 \u03bcm) in Danish marine waters", "description": "Microplastics (MPs) were quantified in Danish marine waters of the Kattegat and the southernmost part of Skagerrak bordering to it. Kattegat is a waterbody between Denmark and Sweden that receives inflow from the Baltic Sea and direct urban runoff from the metropolitan area of Copenhagen and Malm\u00f6. MPs were measured in 14 continuous transects while steaming between monitoring stations. MP levels tended to be highest close to the Copenhagen-Malm\u00f6 area, albeit this was more obvious from the abundance of particles rather than mass. The outcome of the measurements allowed a rough MP budget in the Danish Straits region, suggesting that urban waste- and stormwater discharges could not be neglected as potential MP source in these waters. The marine samples were collected by pumping and filtering water over 10 \u03bcm steel filters, hereby sampling a total of 19.3 m3. They were prepared and analyzed by FPA-\u03bcFTIR imaging, and the scans interpreted to yield MP size, shape, polymer type, and estimated mass. The average concentration was 103 \u00b1 86 items m-3, corresponding to 23.3 \u00b1 28.3 \u03bcg m-3 (17-286 items m-3; 0.6-84.1 \u03bcg m-3). Most MPs were smaller than 100 \u03bcm and fragments dominated the samples. The carbonyl index was assessed for polyolefins, showing that oxidation increased with decreasing MP size, but did not correlate with distance to urban areas. 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In addition, this study analyzes the performance of this feature along with polarization and intensity products according to different classification strategies and algorithms. Seven different classification workflows were evaluated, covering pixel- and object-based analyses, unsupervised and supervised classification, different machine-learning classifiers, and the various effects of distinct input features in the SAR domain\u2014interferometric coherence, backscattered intensities, and polarization. All classifications followed the Corine land cover nomenclature. Three different study areas in Europe were selected during 2015 and 2016 campaigns to maximize diversity of land cover. Overall accuracies (OA), ranging from 70% to 90%, were achieved depending on the study area and methodology, considering between 9 and 15 classes. The best results were achieved in the rather flat area of Do\u00f1ana wetlands National Park in Spain (OA 90%), but even the challenging alpine terrain around the city of Merano in northern Italy (OA 77%) obtained promising results. The overall potential of Sentinel-1 interferometric coherence for land cover mapping was evaluated as very good. In all cases, coherence-based results provided higher accuracies than intensity-based strategies, considering 12 days of temporal sampling of the Sentinel-1 A stack. Both coherence and intensity prove to be complementary observables, increasing the overall accuracies in a combined strategy. The accuracy is expected to increase when Sentinel-1 A/B stacks, i.e., six-day sampling, are considered.", "keywords": ["Teledetecci\u00f3", "550", "Interferometric coherence", "Geophysics. 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This paper presents a KPI for safe urban roads that was developed and tested in the European Trendline project. Based on discussions with 18 experts from 8 countries, it was decided to start with the basic indicator \u2018Share of 30 km/h road length of the total length of urban roads\u2019 which was tested in five pilot countries using available local, national and international (GIS) databases. The share of 30 km/h roads appeared to differ considerably between the pilot countries, ranging from less than 1% in the city of Silistra in Bulgaria to 73% in the Netherlands. The pilots showed that it is possible to calculate the KPI, although it is important to check the quality of the speed limit data and there will be some differences in selections due to data availability and local context. Also the use of additional indicators related to the concept of safe speeds was explored in the pilots. 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The average concentration was 103 \u00b1 86 items m-3, corresponding to 23.3 \u00b1 28.3 \u03bcg m-3 (17-286 items m-3; 0.6-84.1 \u03bcg m-3). Most MPs were smaller than 100 \u03bcm and fragments dominated the samples. The carbonyl index was assessed for polyolefins, showing that oxidation increased with decreasing MP size, but did not correlate with distance to urban areas. A rough budget of MP in the Danish Straits region suggested that MPs discharged from urban waste- and stormwaters were an import source of MPs.", "keywords": ["MP abundance", "13. Climate action", "Microplastics", "\u03bcFTIR-imaging", "/dk/atira/pure/sustainabledevelopmentgoals/life_below_water; name=SDG 14 - Life Below Water", "11. Sustainability", "Microplastic sources", "Mass concentration", "14. Life underwater", "/dk/atira/pure/sustainabledevelopmentgoals/sustainable_cities_and_communities; name=SDG 11 - Sustainable Cities and Communities", "6. 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