[PDF]    http://dx.doi.org/10.3952/lithjphys.53307

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 53, 168174 (2013)

V. Valuntaitėa, D. Jasaitisa, R. Girgždienėa,b , and A. Girgždysa
aVilnius Gediminas Technical University, Saulėtekio 11, LT-10223 Vilnius, Lithuania
E-mail: vaida.valuntaite@vgtu.lt
bState Research Institute Center for Physical Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania

Received 13 February 2013; revised 17 June 2013; accepted 20 June 2013

This paper presents the study of variation in ozone concentration and volumetric activities of radon decay products as well as their relationship at the ground level of the atmosphere on the Curonian Spit. The simultaneous measurements of the ground-level ozone concentration and volumetric activity of radon progeny gave a possibility to identify the presence of a breeze phenomenon on the Curonian Spit during an extreme weather event in summer when ozone concentration exceeded the target value of 120 μg m−3 that can have a negative impact on human health. The evident influence of wind direction on ozone concentration and volumetric activity of radon progeny was estimated.
Keywords: radon decay products, volumetric activity, ozone concentration, meteorological parameters, breeze
PACS: 92.60.Sz, 91.10.Vr, 23.60.+e, 89.40.Dd

V. Valuntaitėa, D. Jasaitisa, R. Girgždienėa,b , A. Girgždysa
aVilniaus Gedimino technikos universitetas, Vilnius, Lietuva
bValstybinis mokslinių tyrimų institutas Fizinių ir technologijos mokslų centras, Vilnius, Lietuva

Tirta ozono koncentracijos ir radono skilimo produktų tūrinio aktyvumo kaita bei jų tarpusavio ryšys atmosferos priežemio sluoksnyje Kuršių nerijoje. Tuo pačiu metu atlikti ozono koncentracijos ir radono skilimo produktų tūrinio aktyvumo matavimai leido 2010 m. liepos mėn. nustatyti brizo reiškinį pajūrio zonoje. Nustatyta, kad esant ekstremalioms oro sąlygoms ozono koncentracija Baltijos jūros pakrantėje viršija 120 μg m−3, t. y. lygį, kuris gali žalingai veikti žmogaus sveikatą. Vertinant meteorologinių parametrų įtaką ozono koncentracijos ir radono skilimo produktų tūrinio aktyvumo eigai priežemio ore nustatyta, kad didžiausią poveikį turėjo vėjo kryptis.

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