1. Študij atmosferskih procesov v Vipavski dolini na podlagi razširjanja aerosolovMarko Vučković, Janja Vaupotič, Griša Močnik, Samo Stanič, Luka Drinovec, Klemen Bergant, Asta Gregorič, Longlong Wang, Maruška Mole, 2016, objavljeni znanstveni prispevek na konferenci Opis: Vipavska dolina je geomorfološko dokaj zaprta, kar po eni strani omogoča pojav močne burje, po drugi strani pa ob stabilnih meteoroloških razmererah ugodne pogoje za kopičenje aerosolov znotraj prizemne mejne plasti. Poznavanje dinamike višinske porazdelitve aerosolov s sočasno uporabo prizemnih meritev omogoča raziskave lokalnih emisij aerosolov, transporta aerosolov na daljše razdalje ter značilnih atmosferskih struktur, ki se pojavijo v različnih vremenskih pogojih. Pri meritvah smo uporabili metode daljinskega zaznavanja z lidarjem, ki omogočajo opazovanje časovnega in prostorskega spreminjanja koncentracij aerosolov, ter točkovne meritve, ki omogočajo njihovo prepoznavanje in določanje njihovih lastnosti. Ugotovili smo, da je mogoče lidarske meritve uporabiti za študij vrste atmosferskih procesov in struktur v zelo različnih vremenskih pogojih. Opazili smo manjše konvekcijske strukture znotraj prizemne mejne plasti in gravitacijske valove nad njo. Meritve vsebnosti in lastnosti aerosolov pri tleh kažejo, da se lahko ob stabilnih atmosferskih pogojih v primerih povečanja lokalnih emisij njihove koncentracije hitro povečajo. Dinamiko in strukturo razširjanja aerosolov znotraj Vipavske doline bomo v prihodnje podrobneje raziskali s sočasnim prostorskim pregledovanjem z metodami daljinskega zaznavanja.
Najdeno v: osebi
Ključne besede: aerosoli, atmosferski procesi, daljinsko zaznavanje, Vipavska dolina
Objavljeno: 25.01.2016; Ogledov: 5786; Prenosov: 9
 Polno besedilo (4,02 MB) |
2. Diurnal cycling of urban aerosols under different weather regimesJanja Vaupotič, Maja Remškar, Griša Močnik, Luka Drinovec, Asta Gregorič, Samo Stanič, 2016, objavljeni povzetek znanstvenega prispevka na konferenci Najdeno v: osebi
Ključne besede: kakovost zraka, črn ogljik, aerosoli
Objavljeno: 03.05.2016; Ogledov: 4504; Prenosov: 229
Polno besedilo (33,73 KB) |
3. The filter loading effect by ambient aerosols in filter absorption photometers depends on the mixing state of the sampled particlesHans Moosmüller, Agnes Fülöp-Miller, Rajan K. Chakrabarty, Ian J. Arnold, Olivier Favez, JEAN SCIARE, Andre S.H. Prevot, Jean-Eudes Petit, Emily Anne Bruns, Robert Wolf, Peter Zotter, Asta Gregorič, Luka Drinovec, Griša Močnik, 2016, izvirni znanstveni članek Najdeno v: osebi
Ključne besede: black carbon, mixing state, Aethalometer, filter-loading effect
Objavljeno: 02.11.2016; Ogledov: 4812; Prenosov: 276
Polno besedilo (2,07 MB) |
4. Influence of source specific black carbon production and meteorology on spatio-temporal distribution of black carbon concentration in Central-European basinLuka Drinovec, Asta Gregorič, Irena Ježek, Rahela Žabkar, Jure Cedilnik, Griša Močnik, 2016, objavljeni povzetek znanstvenega prispevka na konferenci Najdeno v: osebi
Ključne besede: black carbon, source apportionment, planetary boundary layer
Objavljeno: 02.11.2016; Ogledov: 4722; Prenosov: 0
Polno besedilo (53,39 KB) |
5. 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, objavljeni povzetek znanstvenega prispevka na konferenci Najdeno v: osebi
Ključne besede: black carbon, source apportionment, radon, planetary boundary layer, lidar
Objavljeno: 10.10.2017; Ogledov: 4479; Prenosov: 224
Polno besedilo (136,72 KB) |
6. Aerosol monitoring over Vipava valley using Raman polarization lidarLuka Drinovec, Griša Močnik, Asta Gregorič, William Eichinger, Klemen Bergant, Samo Stanič, Longlong Wang, 2018, objavljeni povzetek znanstvenega prispevka na konferenci Opis: 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.
Najdeno v: osebi
Ključne besede: lidar, aerosol type, Vipava valley
Objavljeno: 03.12.2018; Ogledov: 3525; Prenosov: 0
Polno besedilo (48,09 KB) |
7. Retrieval of Vertical Mass Concentration Distributions—Vipava Valley Case StudyMiloš Miler, Janja Vaupotič, Luka Drinovec, Griša Močnik, William Eichinger, Klemen Bergant, Samo Stanič, Longlong Wang, Mateja Gosar, Asta Gregorič, 2019, izvirni znanstveni članek Opis: 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.
Najdeno v: osebi
Ključne besede: valley air pollution, aerosol vertical distributions, lidar remote sensing, in-situ measurements, aerosol identification
Objavljeno: 09.01.2019; Ogledov: 3420; Prenosov: 108
Polno besedilo (7,43 MB) |
8. Investigation of Aerosol Properties and Structures in Two Representative Meteorological Situations over the Vipava Valley Using Polarization Raman LiDARLuka Drinovec, Griša Močnik, William Eichinger, Samo Stanič, Longlong Wang, Asta Gregorič, 2019, izvirni znanstveni članek Opis: 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.
Najdeno v: osebi
Ključne besede: aerosol structures, aerosol characterization, polarization Raman LiDAR, Vipava valley
Objavljeno: 08.03.2019; Ogledov: 3165; Prenosov: 114
Polno besedilo (3,11 MB) |
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10. Detection of mineral dust concentration in Mediterranean and Central Europe by measuring optical absorption of dust particlesIrena Ježek, Matic Ivančič, Martin Rigler, Asta Gregorič, Balint Alfoldy, Luka Drinovec, JEAN SCIARE, MICHAEL PIKRIDAS, FLORIN UNGA, Andres Alastuey, Marco Pandolfi, Jesus Yus Diez, Griša Močnik, 2020, prispevek na konferenci brez natisa Najdeno v: osebi
Ključne besede: mineral dust, optical absorption, virtual impactor
Objavljeno: 22.11.2021; Ogledov: 1068; Prenosov: 0
Polno besedilo (4,15 MB) |
