Formation and growth of aerosol particles in boreal forest of Siberia
Authors: Demakova Anastasiia , Garmash Olga , Ezhova Ekaterina , Arshinov Mikhail , Davydov Denis , Belan Boris , Noe Steffen , Komsaare Kaupo , Vana Marko , Junninen Heikki , Bianchi Federico , Dada Lubna , Petäjä Tuukka , Kerminen Veli-Matti , Kulmala Markku 
Published: March 2021

&lt;p&gt;New Particle Formation (NPF) is a process in which a large number of particles is formed in the atmosphere via gas-to-particle conversion. Previous research shows the important role of formation of new particles for atmosphere, clouds and climate (Kerminen, V.-M. et al. 2018).&lt;/p&gt;&lt;p&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; There exist measurements from different parts of the world which show that NPF is happening worldwide (Kerminen, V.-M. et al. 2018). Measurements at SMEAR II station in Hyyti&amp;#228;l&amp;#228;, Finland (Hari P. and Kulmala M., 2005), show that NPF is a common process in Finland&amp;#8217;s boreal forests. However, measurements at Zotto station in Siberia, Russia, show that NPF events are very rare in that area (Wiedensohler A. et al., 2018). Measurements in Siberian boreal forests are sparse. We have conducted new measurements at Fonovaya station near Tomsk (Siberia, Russia) using Neutral cluster Air Ion Spectrometer (NAIS), Particle Size Magnifier (PSM), Differential Mobility Particle Sizer (DMPS) and the Atmospheric Pressure interface Time-Of-Flight mass spectrometer (APi-TOF). Those instruments measure aerosol particle number size distribution (NAIS, DMPS), ion number size distribution (NAIS), size distribution of small particles (PSM) and chemical composition of aerosol particles (APi-TOF). The novelty of this work is that such complex measurements have not been done in Siberia before.&lt;/p&gt;&lt;p&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; Here we report the first results of our research on NPF phenomenon in Siberian boreal forest. We present detailed statistics of NPF events, as well as formation rates (J) and growth rates (GR) of aerosol particles. The results from Fonovaya station are compared with those from SMEAR II station and from SMEAR Estonia station in J&amp;#228;rvselja, Estonia.&lt;/p&gt;&lt;p&gt;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160;&amp;#160; &amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;Literature&lt;/p&gt;&lt;ul&gt;&lt;li&gt;[1] Kerminen V.-M. et al. &amp;#8220;Atmospheric new particle formation and growth: review of field observations&amp;#8221;. In: Environmental Research Letters 10 (2018), p. 103003.&lt;/li&gt;
&lt;li&gt;[2] Wiedensohler A. et al. &amp;#8220;Infrequent new particle formation over the remote boreal forest of Siberia&amp;#8221;. In: Atmospheric Environment 200 (2019), pp. 167&amp;#8211;169.&lt;/li&gt;
&lt;li&gt;[3] Dada L. et al. &amp;#8220;Long-term analysis of clear-sky new particle formation events and nonevents in Hyyti&amp;#228;l&amp;#228;&amp;#8221;. In: Atmospheric Chemistry and Physics 10 (2017), pp. 6227&amp;#8211;6241.&lt;/li&gt;
&lt;/ul&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;