convener:Jun Zheng(Nanjing University of Information Science and Technology), Lin Wang(Fudan University)

Despite of the fact that new particle formation (NPF) contributes about half of the aerosol population globally, the underlying mechanisms governing the NPF remain poorly understood. Current NPF models often lead to conflicting results with respect to real-time in-situ observations. Consequently, NPF process is seldomly incorporated into atmospheric models, causing great hindrance to accurately assess aerosol atmospheric impacts on air pollution formation and climate change on both regional and global scales. Although H2SO4, basic gases, and HOMs have been proposed to be responsible for NPF, searching for potential NPF precursors are still an active subject of research. Many recent studies strongly indicate that NPF mechanism may differ from place to place and the newly formed particles may also possess distinct properties (e.g., CCN activity). Nevertheless, there is a great demand to reconcile the conflicting results and to improve our understanding of the mechanisms for NPF. This session solicits contributions that describe research progresses on any aspects of NPF, including laboratory studies, theoretical calculation and modeling, and field measurements.