A long-term study of new particle formation in a coastal environment: Meteorology, gas phase and solar radiation implications

摘要: Abstract New particle formation (NPF) was investigated at a coastal background site in Southwest Spain over four-year period using Scanning Particle Mobility Sizer (SMPS). The goals of the study were to characterise NPF and investigate their relationship meteorology, gas phase (O 3 , SO 2 CO NO ) solar radiation (UVA, UVB global). A methodology for identifying classifying implemented wind direction modal concentrations as inputs. events showed frequency 24% total days analysed. mean duration 9.2 ± 4.2 h. Contrary previous studies conducted other locations, reached its maximum during cold seasons approximately 30% days. lowest took place July with 10%, seasonal pattern found be most important parameter influencing frequency. rate 2.2 ± 1.7 cm − 3  s − 1 spring early autumn minimum summer winter. growth 3.8 ± 2.4 nm h higher values occurring from autumn. rates are agreement observations continental sites Northern Hemisphere. classification different classes explore effect synoptic regional-scale patterns on growth. results show that under breeze regime, temperature indirectly affects events. Higher temperatures increase strength recirculation, favouring accumulation subsequent appearance. Additionally, role high relative humidity inhibiting evinced scenarios. remaining meteorological variables (RH), trace gases (CO NO), radiation, PM 10 condensation sink, moderate or connection both rates.