Longlong Wang (Author), Samo Stanič (Author), William Eichinger (Author), Griša Močnik (Author), Luka Drinovec (Author), Asta Gregorič (Author)

Abstract

Vipava valley in Slovenia is a representative hot-spot for complex mixtures of different aerosol types of both anthropogenic and natural origin. Aerosol loading distributions and optical properties were investigated using a two-wavelength polarization Raman LiDAR, which provided extinction coefficient, backscatter coefficient, depolarization ratio, backscatter Ångström exponent and LiDAR ratio profiles. Two different representative meteorological situations were investigated to explore the possibility of identifying aerosol types present in the valley. In the first case, we investigated the effect of strong downslope (Bora) wind on aerosol structures and characteristics. In addition to observing Kelvin–Helmholtz instability above the valley, at the height of the adjacent mountain ridge, we found new evidence for Bora-induced processes which inject soil dust aerosols into the free troposphere up to twice the height of the planetary boundary layer (PBL). In the second case, we investigated aerosol properties and distributions in stable weather conditions. From the observed stratified vertical aerosol structure and specific optical properties of different layers we identified predominant aerosol types in these layers.

Keywords

aerosol structures;aerosol characterization;polarization Raman LiDAR;Vipava valley;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 53
COBISS: 5336571 Link will open in a new window
ISSN: 2073-4433
Views: 3180
Downloads: 115
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 128-1-128-13
Volume: ǂVol. ǂ10
Issue: ǂiss. ǂ3
Chronology: 2019
DOI: 10.3390/atmos10030128
ID: 11043051