Towards Direct Measurement of Atmospheric Nucleation
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Towards Direct Measurement of Atmospheric Nucleation. / Kulmala, K; Riipinen, I; Sipila, M; Manninen, HE; Petaja, T; Junninen, H; Dal Maso, M; Mordas, G; Mirme, A; Vana, M; Hirsikko, A; Laakso, L; Harrison, Roy; Hanson, Ian; Leung, Carl; Lehtinen, KEJ; Kerminen, V-M.
In: Science, Vol. 318, 05.10.2007, p. 89-92.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Towards Direct Measurement of Atmospheric Nucleation
AU - Kulmala, K
AU - Riipinen, I
AU - Sipila, M
AU - Manninen, HE
AU - Petaja, T
AU - Junninen, H
AU - Dal Maso, M
AU - Mordas, G
AU - Mirme, A
AU - Vana, M
AU - Hirsikko, A
AU - Laakso, L
AU - Harrison, Roy
AU - Hanson, Ian
AU - Leung, Carl
AU - Lehtinen, KEJ
AU - Kerminen, V-M
PY - 2007/10/5
Y1 - 2007/10/5
N2 - Atmospheric aerosol formation is known to occur almost all over the world, and the importance of these particles to climate and air quality has been recognized. Although almost all of the processes driving aerosol formation take place below a particle diameter of 3 nanometers, observations cover only larger particles. We introduce an instrumental setup to measure atmospheric concentrations of both neutral and charged nanometer-sized clusters. By applying the instruments in the field, we come to three important conclusions: (i) A pool of numerous neutral clusters in the sub-3 nanometer size range is continuously present; (ii) the processes initiating atmospheric aerosol formation start from particle sizes of approximately 1.5 nanometers; and (iii) neutral nucleation dominates over the ion-induced mechanism, at least in boreal forest conditions.
AB - Atmospheric aerosol formation is known to occur almost all over the world, and the importance of these particles to climate and air quality has been recognized. Although almost all of the processes driving aerosol formation take place below a particle diameter of 3 nanometers, observations cover only larger particles. We introduce an instrumental setup to measure atmospheric concentrations of both neutral and charged nanometer-sized clusters. By applying the instruments in the field, we come to three important conclusions: (i) A pool of numerous neutral clusters in the sub-3 nanometer size range is continuously present; (ii) the processes initiating atmospheric aerosol formation start from particle sizes of approximately 1.5 nanometers; and (iii) neutral nucleation dominates over the ion-induced mechanism, at least in boreal forest conditions.
U2 - 10.1126/science.1144124
DO - 10.1126/science.1144124
M3 - Article
C2 - 17761851
VL - 318
SP - 89
EP - 92
JO - Science
JF - Science
SN - 0036-8075
ER -