1. Lidar measurements of Bora wind effects on aerosol loadingMaruška Mole, Longlong Wang, Samo Stanič, Klemen Bergant, William Eichinger, Francisco Ocaña, Benedikt Strajnar, Primož Škraba, Marko Vučković, William Willis, 2017, original scientific article Abstract: The Vipava valley in Slovenia is well known for the appearance of strong, gusty North-East Bora winds, which occur as a result of air
flows over an adjacent orographic barrier. There are three revealing wind directions within the valley which were found to give rise to
specific types of atmospheric structures. These structures were investigated using a Mie scattering lidar operating at 1064 nm, which provided high temporal and spatial resolution backscatter data on aerosols, which were used as tracers for atmospheric flows. Wind
properties were monitored at the bottom of the valley and at the rim of the barrier using two ultrasonic anemometers. Twelve time periods between February and April 2015 were selected when lidar data was available. The periods were classified according to the wind speed and direction and investigated in terms of appearance of atmospheric structures. In two periods with strong or moderate Bora, periodic atmospheric structures in the lidar data were observed at heights above the mountain barrier and are believed to be Kelvin–Helmholtz waves, induced by wind shear. No temporal correlation was found between these structures and wind gusts at the ground level. The influence of the wind on the height of the planetary boundary layer was studied as well. In periods with low wind speeds, the vertical evolution of the planetary boundary layer was found to be governed
by solar radiation and clouds. In periods with strong or moderate Bora wind, convection within the planetary boundary layer was found to be much weaker due to strong turbulence close to the ground, which inhibited mixing through the entire layer.
Keywords: Downslope wind
Lidar observations
Kelvin–Helmholtz waves
Bora
Published in RUNG: 06.01.2017; Views: 4822; Downloads: 0
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2. Observations of atmospheric structures in the Vipava valley based on Lidar dataMaruška Mole, Longlong Wang, Samo Stanič, Asta Gregorič, Klemen Bergant, William Eichinger, Marko Vučković, 2016, published scientific conference contribution abstract Keywords: lidar, atmosferske strukture, vremenske razmere
Published in RUNG: 03.05.2016; Views: 4514; Downloads: 0
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3. Evolution of the planetary boundary layer in the presence of fog and plumeLonglong Wang, Samo Stanič, Asta Gregorič, Klemen Bergant, Maruška Mole, Marko Vučković, 2016, published scientific conference contribution abstract Keywords: lidar, vodna para, sipanje, GPS
Published in RUNG: 03.05.2016; Views: 4891; Downloads: 1
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4. Študij atmosferskih procesov v Vipavski dolini na podlagi razširjanja aerosolovMaruška Mole, Longlong Wang, Asta Gregorič, Klemen Bergant, Luka Drinovec, Griša Močnik, Samo Stanič, Janja Vaupotič, Marko Vučković, 2016, published scientific conference contribution Abstract: 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.
Keywords: aerosoli, atmosferski procesi, daljinsko zaznavanje, Vipavska dolina
Published in RUNG: 25.01.2016; Views: 6071; Downloads: 9
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7. A GPS and Galileo carrier tracking architecture robust to ionospheric scintillationMarko Vučković, Rodrigo Romero, Melania Susi, Fabio Dovis, Marcus Andreotti, Marcio Aquino, 2014, published scientific conference contribution Keywords: ionosferske scintilacije, prilagodljiv Kalmanov filter, GPS signali, Galileo signali
Published in RUNG: 22.01.2015; Views: 5094; Downloads: 34
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