41. Investigation of Aerosol Properties and Structures in Two Representative Meteorological Situations over the Vipava Valley Using Polarization Raman LiDARLonglong Wang, Samo Stanič, William Eichinger, Griša Močnik, Luka Drinovec, Asta Gregorič, 2019, original scientific article 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
Published in RUNG: 08.03.2019; Views: 3890; Downloads: 118
 Full text (3,11 MB) |
42. Retrieval of Vertical Mass Concentration Distributions—Vipava Valley Case StudyLonglong Wang, Samo Stanič, Klemen Bergant, William Eichinger, Griša Močnik, Luka Drinovec, Janja Vaupotič, Miloš Miler, Mateja Gosar, Asta Gregorič, 2019, original scientific article Abstract: Aerosol vertical profiles are valuable inputs for the evaluation of aerosol transport models, in order to improve the understanding of aerosol pollution ventilation processes which drive the dispersion of pollutants in mountainous regions. With the aim of providing high-accuracy vertical distributions of particle mass concentration for the study of aerosol dispersion in small-scale valleys, vertical profiles of aerosol mass concentration for aerosols from different sources (including Saharan dust and local biomass burning events) were investigated over the Vipava valley, Slovenia, a representative hot-spot for complex mixtures of different aerosol types of both anthropogenic and natural origin. The analysis was based on datasets taken between 1–30 April 2016. In-situ measurements of aerosol size, absorption, and mass concentration were combined with lidar remote sensing, where vertical profiles of aerosol concentration were retrieved. Aerosol samples were characterized by SEM-EDX, to obtain aerosol morphology and chemical composition. Two cases with expected dominant presence of different specific aerosol types (mineral dust and biomass-burning aerosols) show significantly different aerosol properties and distributions within the valley. In the mineral dust case, we observed a decrease of the elevated aerosol layer height and subsequent spreading of mineral dust within the valley, while in the biomass-burning case we observed the lifting of aerosols above the planetary boundary layer (PBL). All uncertainties of size and assumed optical properties, combined, amount to the total uncertainty of aerosol mass concentrations below 30% within the valley. We have also identified the most indicative in-situ parameters for identification of aerosol type.
Keywords: valley air pollution, aerosol vertical distributions, lidar remote sensing, in-situ measurements, aerosol identification
Published in RUNG: 09.01.2019; Views: 4216; Downloads: 113
Full text (7,43 MB) |
43. Aerosol monitoring over Vipava valley using Raman polarization lidarLonglong Wang, Samo Stanič, Klemen Bergant, William Eichinger, Asta Gregorič, Griša Močnik, Luka Drinovec, 2018, published scientific conference contribution abstract Abstract: Vipava valley in southwest Slovenia is a representative hot-spot for complex mixtures of different aerosol types of both anthropogenic and natural origin in mountainous terrain. An investigation of aerosol properties throughout the troposphere in different atmospheric conditions was made possible by a deployment of a two-wavelength polarization Raman lidar system combining with in-situ measurements in the valley (in the town of Ajdovščina) from September 2017. Using its aerosol identification capabilities, which are based on particle depolarization ratio and lidar ratio measurements, it was possible to identify predominant aerosol types in the observed atmospheric structures, for example in different atmospheric layers in the case of stratified atmosphere. Primary anthropogenic aerosols within the valley were found to be mainly emitted from two sources: individual domestic heating systems, which mostly use biomass fuel, and from traffic. A considerable fraction of natural aerosols (for example mineral dust and sea salt), transported over large distances, were observed both above and entering into the planetary boundary layer. According to the properties of different aerosol types, backscatter contribution of each aerosol type was evaluated and the corresponding extinction contribution was derived from lidar observations. Statistical analysis of the presence of different aerosol types was performed on the entire available dataset from 2017 and 2018.
Keywords: lidar, aerosol type, Vipava valley
Published in RUNG: 03.12.2018; Views: 4298; Downloads: 0
This document has many files! More... |
44. Efficient traffic regulation based on urban Black Carbon measurements and prediction modelAsta Gregorič, Luka Drinovec, Griša Močnik, Anja Barle, Matija Marolt, Jernej Henigman, Borut Šuštar, Mitja Ferlan, Andrej Pangeršič, 2018, published scientific conference contribution abstract Keywords: air quality, black carbon
Published in RUNG: 29.10.2018; Views: 3630; Downloads: 0
This document has many files! More... |
45. Uporaba različnih kvasovk v pridelavi jabolčnega vinaLuka Koporec, 2018, undergraduate thesis Abstract: Kemijske in senzorične lastnosti vina so poleg genetskih danosti ter geo-klimatskih okoliščin odvisne tudi od strategije tehnologije pridelave, ki jo izbere vinar. V to strategijo spada tudi izbira seva kvasovke. Vinski trg postaja vse bolj zahteven in željan nečesa novega, zato vse več vinarjev poskuša pridobiti drugačne lastnosti vin z uporabo drugačnih sevov kvasovk, oziroma z uporabo kombinacij različnih vrst kvasovk. V diplomski nalogi smo preučevali vpliv različnih kombinacij kvasovk na potek fermentacije ter na osnovne kemijske in senzorične lastnosti pridelanega jabolčnega vina. Poskus je bil izveden na laboratorijski skali. Rezultati poskusa so pokazali, da različne vrste kvasovk različno vplivajo na senzorične lastnosti vina, nekoliko manj pa na kemijske lastnosti. Rezultati nakazujejo, da različne kvasovke različno hitro porabljajo sladkorje, kar vpliva tudi na hitrost poteka fermentacije. Ob opazovanju osnovnih kemijskih lastnostih smo opazili razlike med kvasovkami oz. kombinacijami kvasovk pri parametrih kot so hlapne kisline in reducirajoči sladkorji, medtem ko v vsebnosti alkohola in pH vrednostih končnih jabolčnih vin med obravnavanimi fermentacijami nismo opazili razlik. Senzorična analiza vonja in barve jabolčnih vin je potrdila vpliv kvasovk na barvo, intenzivnost, trajnost in vrsto vonja.
Keywords: jabolčno vino, ne-Saccharomyces kvasovke, potek fermentacije, kvasovke, senzorična analiza
Published in RUNG: 26.10.2018; Views: 6460; Downloads: 212
Full text (1,34 MB) |
46. Nadrealistično razumevanje sanj v sodobni fotografijiInes Ozimek, 2018, undergraduate thesis Abstract: V diplomskem delu se ukvarjam s pojmom nadrealizma kot gibanja in stila v umetnosti. Namen naloge je predstavitev lastnosti nadrealističnega gibanja. Osmislim povezavo med umetnostjo, upodobitvijo sanj, ter smernicami nadrealizma. Orišem Jungovo in Freudovo pojmovanje sanj. Hkrati podam skupne smernice nadrealizma in psihoanalitičnega interpretiranja sanj in se navežem na fotografski medij kot možnost manipulacije in uporabe sodobnih tehnik. Na koncu skozi svoje lastno delo dajem pomen vsem dotedanjim nadrealističnim raziskavam, ki jih v delu s pridom izkoristim. Proces lastne fotografske serije razčlenim od ideje do končnega izdelka. Navedem tehnične in vsebinske napotke za izvedbo foto manipulacij. Svoje sanje in s tem fotografsko serijo interpretiram iz psihoanalitičnega vidika. Ugotavljam, da je nadrealistična umetnost tesno povezana s sanjskim svetom. Nadrealistična umetnost izraža potrebo po razbijanju vrednot, ki odsevajo realnost. Umetniki s pomočjo tehnike avtomatizma upodabljajo motive, ki temeljijo na podzavestnih vsebinah. Pri tem se opirajo na Freudovo simboliko sanj. Ne iščejo razlag podzavestnega, temveč osvoboditev duha.
Keywords: fotografija, Freud, Jung, nadrealizem, psihoanaliza, sanje
Published in RUNG: 27.09.2018; Views: 4117; Downloads: 184
Full text (1,81 MB)
This document has many files! More... |
47. Cadmium localization and chemical environment in a cadmium bioindicator Gomphrena clausseniiPaula Pongrac, Mina T. Villafort Carvalho, Tânia S. Serra, Hiram Castillo Michel, Katarina Vogel-Mikuš, Iztok Arčon, Luka Jeromel, Mitja Kelemen, Boštjan Jenčič, Anja Kavčič, Primož Pelicon, Mark G. M. Aarts, 2018, published scientific conference contribution abstract Keywords: cadmium
Published in RUNG: 12.09.2018; Views: 3588; Downloads: 0
This document has many files! More... |
48. Vertical profiling of aerosol properties with two-wavelength polarization Raman lidar over the Vipava valleyLonglong Wang, Samo Stamoč, Asta Gregorič, Griša Močnik, Luka Drinovec, Klemen Bergant, William Eichinger, 2018, published scientific conference contribution abstract Abstract: Presence of atmospheric aerosols affects the Earth’s radiation budget and thus also atmospheric thermal structure,
which in turn affects cloud and planetary boundary layer (PBL) dynamics. We combine in-situ and remote
measurements to determine aerosol properties in a representative hot-spot for air pollution in a complex terrain
configuration. Vertical profiles of aerosol properties were investigated using a two-wavelength polarization
Raman lidar system in the Vipava valley. Using lidar-obtained particle depolarization ratio, lidar ratio and
backscatter Ångström exponent (355 nm / 1064 nm), which depend on aerosol shape, size and refractive index,
thus the aerosols can be identified and the roles of different aerosol types in the observed atmospheric processes
were investigated. In addition, aerosol absorption coefficients were measured in-situ by Aethalometers (AE33,
Magee Scientific / Aerosol d.o.o.) on the valley floor and on the adjacent mountain range, 850 m above the lidar site.
Our primary goal was to study the variability of aerosol types within and above the Vipava valley, which
was performed using the entire lidar dataset from August – December 2017. Primary anthropogenic aerosols
within the valley is mainly emitted from two sources: individual domestic heating systems, which mostly use
biomass fuel and traffic. Natural aerosols, transported by long-range transport, such as mineral dust and sea salt,
were observed both above the PBL and entering into the PBL. Vertical distributions of aerosol properties, in par-
ticular the particle depolarization ratio, indicated atmospheric stratification with different aerosol types occupying
different height ranges. In the presence of Bora (strong down-slope wind), Kelvin-Helmholtz instabilities were
observed between the PBL and the free troposphere. Using aerosol type identification capability of our system,
we discovered that this instability was responsible for ejecting aerosols from the PBL up to 2 km into the free
troposphere.
In addition, we improved the reliability of aerosol identification in vertical profiles using absorption coeffi-
cient measured by Aethalometer. Combining it with the aerosol extinction coefficient at 355 nm derived from
lidar data, we derived aerosol single scattering albedo (SSA), which is an important parameter for aerosol
characterization.
Keywords: Aerosol, Vipava valley, lidar
Published in RUNG: 23.04.2018; Views: 4348; Downloads: 0
This document has many files! More... |
49. Distinguishing source specific black carbon production from meteorologically driven temporal variability by means of 222Rn tracerAsta Gregorič, Luka Drinovec, Irena Ježek, Janja Vaupotič, Longlong Wang, Maruška Mole, Samo Stanič, Griša Močnik, 2017, published scientific conference contribution abstract Keywords: black carbon, source apportionment, radon, planetary boundary layer, lidar
Published in RUNG: 10.10.2017; Views: 5339; Downloads: 229
Full text (136,72 KB) |
50. Long-term investigation of aerosol variability in the boundary layer over Vipava valley based on lidar observations and black carbon measurementsLonglong Wang, Klemen Bergant, Marija Bervida, Luka Drinovec, William Eichinger, Asta Gregorič, Dafina Kikaj, Griša Močnik, Maruška Mole, Janja Vaupotič, Samo Stanič, 2017, published scientific conference contribution abstract Published in RUNG: 21.07.2017; Views: 5001; Downloads: 0
This document has many files! More... |
