Characteristics of Aerosol and Cloud Condensation Nuclei Concentrations Measured over the Yellow Sea on a Meteorological Research Vessel, GISANG 1

Total number concentration of aerosols larger than 10 nm (N-CN10), 3 nm (N-CN3), and cloud condensation nuclei (N-CCN) were measured during four different ship cruises over the Yellow Sea. Average values of N-CN10 and N-CCN at 0.6% supersaturation were 6914 and 3353 cm(-3), respectively, and the minimum value of N-CN10 was 2000 cm(-3), suggesting significant anthropogenic influence even at relatively clean marine environment. Although N-CN10 and N-CN3 increased near the coast due to anthropogenic influence, NCCN was relatively constant and therefore N-CCN/NCN10 ratio tended to decrease, suggesting that coastal aerosols were relatively less hygroscopic. In general N-CN10, N-CN3, and N-CCN during the cruises seemed to be significantly influenced by wet scavenging effects (e.g. fog) and boundary layer height variation. Only one new particle formation (NPF) event was observed during the measurement period. Interestingly, the NPF event occurred during a dust storm event and spatial scale of the NPF event was estimated to be larger than 100 km. These results demonstrate that aerosol and CCN concentration over the Yellow Sea can vary due to various different factors.