1. Retrieval of vertical mass concentration distributionsLonglong 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 DiRROS: 03.03.2022; Views: 1081; Downloads: 370 Link to full text |
2. Vpliv podnebnih sprememb na pričakovano prostorsko prerazporeditev tipov gozdne vegetacijeLado Kutnar, Andrej Kobler, Klemen Bergant, 2009, original scientific article Abstract: V raziskavi smo simulirali prostorsko prerazporeditev tipov gozdne vegetacije v Sloveniji, do katere bi lahko prišlo ob pričakovanih podnebnih spremembah. Potencialne prostorske spremembe gozdne vegetacije so bile analizirane v GIS okolju s pomočjo empiričnega modela, ki napoveduje prostorsko razporeditev gozdne vegetacije v odvisnosti od podnebnih in drugih parametrov. Rezultati simulacij na osnovi treh podnebnih scenarijev kažejo, da se bo vzorec razporeditve gozdne vegetacije menjal pod vplivom podnebnih sprememb. Po napovedih bi lahko do leta 2070 prišlo do sprememb vegetacijskega tipa na več kot 75 % vseh gozdnih površin. Danes prevladujoči, pretežno bukovi gozdovi bi lahko bili v spremenjenih okoljskih razmerah močno prizadeti. Model napovedujepadec deleža prevladujočih mezofilnih bukovih gozdov s sedanjih 57 %na samo 3 % po pesimističnem scenariju in do 29 % po optimističnem scenariju.V toplejšem podnebju, ki ga predvidevajo vsi trije scenariji, bi se močno razširili različni termofilni gozdovi. Published in DiRROS: 12.07.2017; Views: 4880; Downloads: 2132 Full text (722,39 KB) |
3. Vpliv klimatskih sprememb na gozdne ekosisteme : zaključno poročilo o rezultatih opravljenega raziskovalnega dela na projektu v okviru ciljnega raziskovalnega programa (CRP)"Konkurenčnost Slovenije 2001-2006"Dušan Jurc, Nikica Ogris, Andrej Kobler, Lado Kutnar, Gregor Božič, Klemen Bergant, Primož Simončič, Urša Vilhar, Tom Levanič, Hojka Kraigher, Mihej Urbančič, Maja Jurc, Matjaž Čater, Gal Kušar, Andreja Ferreira, Marjana Westergren, Barbara Štupar, Iztok Sinjur, Lučka Kajfež-Bogataj, Zalika Črepinšek, 2006, final research report Keywords: klima, sprememba klime, gozdni ekosistemi Published in DiRROS: 12.07.2017; Views: 3720; Downloads: 1106 Full text (29,02 MB) |