Lithuanian Journal of Physics article / Lietuvos fizikos žurnalo straipsnis

AEROSOL PARTICLE FORMATION IN THE LITHUANIAN HEMI-BOREAL FOREST
Vadimas Dudoitis^a, Genrik Mordas^a, Steigvilė Byčenkienė^a, Kristina Plauškaitė^a, Julija Pauraitė^a, Dalia Jasinevičienė^a, Vitas Marozas^b, Gintaras Pivoras^b, Gintautas Mozgeris^b, Algirdas Augustaitis^b, and Vidmantas Ulevičius^a
^aSRI Center for Physical Sciences and Technology, Saulėtekio 3, 10257 Vilnius, Lithuania
^bAleksandras Stulginskis University, Studentų 13, 53362 Akademija, Lithuania
E-mail: vadimas.dudoitis@ftmc.lt
Received 24 April 2018; revised 13 August 2018; accepted 15 October 2018

Aerosol particle observations are needed to determine the conditions of particle formation and growth in different environments. This research focuses on new particle formation (NPF) events in the hemi-boreal forest environment at the Aukštaitija Integrated Monitoring Station (IMS) (55°26ʹN and 26°04ʹE, 170 m above the sea level). The parameterisation of aerosol particle Nucleation I (3–10 nm), Nucleation II (10–20 nm) and Aitken (20–100 nm) modes was performed, their inputs to the total particle number concentration (PNC) and distribution were assessed. It has been estimated that around 40% of days in spring and 22% in summer were NPF event days. The highest contribution of Nucleation mode I aerosol particles was observed in June, reaching up to 38% of the total PNC values. The mean growth rate (GR) and condensation sink (CS) values at the Aukštaitija IMS in April and May were 2.9 nm·h^–1, 1.30·10^–3 s^–1 and 5.3 nm·h^–1, 1.35·10^–3 s^–1, respectively. The GR and CS values were well in agreement with the results obtained from other hemi-boreal forest sites in the Baltic Sea region.

Keywords: new particle formation, nucleation, SMPS, hemi-boreal forest
PACS: 92.60.Mt

AEROZOLIO DALELIŲ SUSIDARYMAS LIETUVOS PUSIAU BOREALINIUOSE MIŠKUOSE
Vadimas Dudoitis^a, Genrik Mordas^a, Steigvilė Byčenkienė^a, Kristina Plauškaitė^a, Julija Pauraitė^a, Dalia Jasinevičienė^a, Vitas Marozas^b, Gintaras Pivoras^b, Gintautas Mozgeris^b, Algirdas Augustaitis^b, Vidmantas Ulevičius^a

^aVMTI Fizinių ir technologijos mokslų centras, Vilnius, Lietuva
^bAleksandro Stulginskio universitetas, Kauno r., Lietuva

Aerozolio dalelių susidarymo ir augimo procesų įvairiose aplinkose stebėjimai yra būtini siekiant ištirti sąlygas, prie kurių šie reiškiniai vyksta. Darbe nagrinėjamas naujų aerozolio dalelių susidarymas Aukštaitijos kompleksinio monitoringo stoties (IMS) miškuose. Įvertinti pagrindiniai fizikiniai aerozolio dalelių 1-osios nukleacinės (3–10 nm), 2-osios nukleacinės (10–20 nm) ir Aitkeno modų (20–100 nm) parametrai, nustatytas šių modų bendras indėlis į skaitinį aerozolio dalelių dydžių pasiskirstymą ir koncentraciją. Pavasarį buvo nustatyti 40 % naujų dalelių susidarymo atvejai, vasarą – 22 %. Didžiausias 1-osios nukleacinės modos indėlis į skaitinę dalelių koncentraciją siekė iki 38 % nuo bendros koncentracijos, jis buvo stebimas 2016 m. birželio mėnesį. Vidutinės aerozolio dalelių augimo greičio (GR) ir kondensacinio nuotėkio (CS) vertės 2016 m. balandžio–gegužės mėn. sudarė atitinkamai 2,9 nm·h^–1, 1,30·10^–3 s^–1 ir 5,3 nm·h^–1, 1,35·10^–3 s^–1. Šio tyrimo metu nustatytos GR ir CS vertės yra artimos vertėms, gautoms iš kitų Baltijos jūros regiono miškingų vietovių.

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