δ13C values in size-segregated atmospheric carbonaceous aerosols at a rural site in Lithuania

Abstract

The investigations of the carbon isotopic ratio in different size aerosol particles at the Rūgšteliškis Integrated Monitoring Station (IMS) at the rural site (Lithuania) during 10–24 July 2008 are presented. Total carbon (TC) concentrations ranged from 0.06 to 0.35 μgm^–3 and those of elemental carbon (EA) from 0.02 to 0.15 μgm^–3 in accumulation mode, as well as from 0.06 to 0.14 μgm^–3 and from 0.02 to 0.06 μgm^–3 in coarse mode of aerosol particles, respectively. Organic matter (OM) concentration ranged from 1.0 to 25.4 μgm^–3, with the average value of 5.6 μgm^–3. Carbon isotopic ratios relative to standard for TC differ significantly in accumulation and coarse modes (–28 and –24‰, respectively) and indicate a different origin of size-segregated aerosol particles. Almost constant organic carbon isotopic ratio (–31.8‰) indicates that OM originates from local vegetation. Organic matter concentrations and the carbon isotopic ratio measurements in the size-segregated aerosol particles allow identifying sources of aerosol particles.
Keywords: optical parametric amplification, filamentation, pulse self-compression, intense few-cycle infrared pulses
PACS: 42.65.Yj, 42.65.Re