Seasonal variation of the atmospheric aerosol near the top of the marine boundary layer over Spitsbergen related to the Arctic sulphur cycle

摘要: With an emphasis on marine biogenic sulphur the first 26 months of fine particle (< 1 μm radius), aerosol data from new air chemistry station Zeppelinfjellet, Spitsbergen (79°N, 12°E, 474 m asl), were evaluated to elucidate source- and transformation processes Arctic aerosol. Results 2 counters, integrating nephelometer, filter samples available for our interpretation. On filters we had analysed soot, (EC), sodium (Na + ), methansulphonate, MSA - , sulphate (SO 4 2- ). Fine composition revealed a strong regional biological source SO which estimated contribute 26% non-sea salt in summer. In winter, no more than 2% non-sea-salt could be attributed source. Rigorous mass analyses combined with EC as tracer anthropogenic combustion sources showed that this became active already March over Barents Sea North Atlantic. summer, levels components very similar those measured at southern hemispheric site Cape Grim (1.5 0.92 nmol -3 nss-SO respectively). For minimum influence found constant /nss-SO ratio size range. This value 28% was temperature-independent. Our results comprise long-term record taken upper part planetary boundary layer often is influenced by persistent stratus. cloud-segregation scheme segregated into group interstitially, i.e., inside clouds (INT), out-of cloud group, (OOC). Average INT/OOC-ratios mass, soot 0.19, 0.21, respectively. While exhibiting average INT/OOC-ratio 0.63 summer implying it less scavenged other components. Complementary physical corroborated interpretation residing smaller particles . Together scavenging support concept most likely formed condensation onto existing while predominantly in-cloud oxidation DOI: 10.1034/j.1600-0889.1994.00005.x