title: Insight into Generation and Evolution of Sea-Salt Aerosols from Field Measurements in Diversified Marine and Coastal Atmospheres.
abstract: This report focuses on studying generation and/or evolution of sea-salt aerosols (SSA) on basis of measurements in the Northwest Pacific Ocean (NWPO), the marginal seas of China, at sea-beach sites and a semi-urban coastal site in 2012-2015. From measurements in the NWPO, we obtained the smallest generation function of the super-micron SSA mass ([MSSA]) by the local wind comparing to those previously reported. Vessel-caused wave-breaking was found to greatly enhance generation of SSA and increase [MSSA], which was subject to non-natural generation of SSA. However, naturally enhanced generation of SSA was indeed observed in the marginal seas and at the sea-beach site. The two enhancement mechanisms may explain the difference among this and previous studies. Size distributions of super-micron SSA exhibited two modes, i.e., 1-2 μm mode and ~5 μm mode. The 1-2 μm mode of SSA was enhanced more and comparable to the ~5 μm mode under the wind speed >7 m/s. However, the smaller mode SSA was largely reduced from open oceans to sea-beach sites with reducing wind speed. The two super-micron modes were comparable again at a semi-urban coastal site, suggesting that the smaller super-micron mode SSA may play more important roles in atmospheres.
authors.affiliation: Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.
authors.forename: Limin
authors.initials: L
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
authors.forename: Hengqing
authors.initials: H
authors.lastname: Shen
authors.affiliation: Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.
authors.forename: Yujiao
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.|Qingdao Collaborative Center of Marine Science and Technology, Qingdao 266100, China.
authors.forename: Huiwang
authors.initials: H
authors.lastname: Gao
authors.affiliation: Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China.|Qingdao Collaborative Center of Marine Science and Technology, Qingdao 266100, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Yao