Towards a concentration closure of sub-6 nm aerosol particles and sub-3 nm atmospheric clusters

Markku Kulmala, Dominik Stolzenburg, Lubna Dada, Runlong Cai, Jenni Kontkanen, Chao Yan, Juha Kangasluoma, Lauri R. Ahonen, Loïc Gonzalez-Carracedo, Juha Sulo, Santeri Tuovinen, Chenjuan Deng (+7 others)
2021 Journal of Aerosol Science  
Atmospheric clusters play a key role in atmospheric new particle formation and they are a sensitive indicator for atmospheric chemistry. Both the formation and loss of atmospheric clusters include a complex set of interlinked physical and chemical processes, and therefore their dynamics is highly non-linear. Here we derive a set of simple equations to estimate the atmospheric cluster concentrations in size ranges of 1.5-2 nm and 2-3 nm as well as 3-6 nm aerosol particles. We compared the
more » ... ed concentrations with measured ones both in a boreal forest site (the SMEAR II station in Hyytiälä, Finland) and in an urban site (the AHL/BUCT station in Beijing, China). We made this comparison first for 3-6 nm particles, since in this size range observations are more reliable than at smaller sizes, and then repeated it for the 2-3 nm size range. Finally, we estimated cluster concentrations in the 1.5-2 nm size range. Our main finding is that the present observations are able to detect a major fraction of existing atmospheric clusters.
doi:10.1016/j.jaerosci.2021.105878 fatcat:7xnu6g4qn5hs5gvuhgedvht6ce