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31.
Lidar Observations of Mountain Waves During Bora Episodes
Longlong Wang, Marija Bervida, Samo Stanič, Klemen Bergant, William Eichinger, Benedikt Strajnar, 2020, objavljeni znanstveni prispevek na konferenci

Opis: Airflows over mountain barriers in the Alpine region may give rise to strong, gusty downslope winds, called Bora. Oscillations, caused by the flow over an orographic barrier, lead to formation of mountain waves. These waves can only rarely be observed visually and can, in general, not be reliably reproduced by numerical models. Using aerosols as tracers for airmass motion, mountain waves were experimentally observed during Bora outbreak in the Vipava valley, Slovenia, on 24-25 January 2019 by two lidar systems: a vertical scanning lidar positioned just below the peak of the lee side of the mountain range and a fixed direction lidar at valley floor, which were set up to retrieve two-dimensional structure of the airflow over the orographic barrier into the valley. Based on the lidar data, we determined the thickness of airmass layer exhibiting downslope motion, observed hydraulic jump phenomena that gave rise to mountain waves and characterized their properties.
Najdeno v: ključnih besedah
Ključne besede: Bora, mountain waves, lidar observations
Objavljeno: 08.07.2020; Ogledov: 1061; Prenosov: 0
.pdf Polno besedilo (3,66 MB)

32.
KO NAM UGANKE VESOLJA POMAGAJO SPOZNAVATI NAŠO ATMOSFERO
2020, radijska ali televizijska oddaja

Opis: Razumevanje najbolj oddaljenih in nenavadnih pojavov v vesolju je lahko tesno povezano z razumevanjem pojavov tu na Zemlji. Iskanje odgovorov na vprašanja, ki jih znanosti denimo zastavljajo eksotični kozmični žarki visokih energij, je povezano s podrobnim razumevanjem Zemljine atmosfere, saj ima atmosfera vlogo ogromnega detektorja. Nova spoznanja ne odpirajo zgolj novih poglavij v našem razumevanju vesolja, ampak tudi vrsto novih možnosti pri razumevanju dejavnikov, ki vplivajo na naše vreme in podnebje. Tem vidikom se bomo posvetili v današnjih Podobah znanja. Naš gost je prof. dr. Samo Stanič, vodja Centra za astrofiziko in kozmologijo Univerze v Novi Gorici. Za vrhunske dosežke pri raziskavah kozmičnih delcev ekstremnih energij je skupaj s kolegoma Andrejem Filipčičem in Markom Zavrtanikom prejel Zoisovo nagrado.
Najdeno v: ključnih besedah
Ključne besede: intervju, Zoisova nagrada, observatorij Pierre Auger, kozmični delci ekstremnih energij, atmosfera, lidar
Objavljeno: 12.02.2021; Ogledov: 713; Prenosov: 23
URL Polno besedilo (0,00 KB)
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33.
Kanarski otoki v plamenih
Uroš Slak, Samo Stanič, Natalija Švab, radijski ali tv dogodek

Opis: Intervju o izbruhu ognjenika Cumbre Vieja na La Palmi, Kanarski otoki, Španjia, ter o raziskavah v okviru projekta Polje Čerenkovih teleskopov (CTA), ki potekajo na observatoriju Roque de los Muchachos.
Najdeno v: ključnih besedah
Ključne besede: ognjenik, izbruh, astrofizika, gama žarki visokih energij, atmosfera, lidar
Objavljeno: 04.10.2021; Ogledov: 185; Prenosov: 0
.pdf Polno besedilo (189,76 KB)

34.
Bora flow characteristics in a complex valley environment
Xiaoquan Song, Klemen Bergant, Longlong Wang, Griša Močnik, Samo Stanič, Marija Bervida, 2021, izvirni znanstveni članek

Opis: This paper complements the existing studies of Bora flow properties in the Vipava valley with the study of Bora turbulence in a lower region of the troposphere. The turbulence characteristics of Bora flow were derived from high resolution Doppler wind lidar measurements during eight Bora wind episodes that occurred in November and December 2019. Based on the vertical profiles of wind velocity, from 80 to 180 m above the valley floor, the turbulence intensity related to all three spatial directions and the along-wind integral length scales related to three velocity components were evaluated and compared to the approximations given in international standards. The resulting turbulence characteristics of Bora flow in a deep mountain valley exhibited interesting behaviour, differing from the one expected and suggested by standards. The intensity of turbulence during Bora episodes was found to be quite strong, especially regarding the expected values for that particular category of terrain. The specific relationship between along-wind, lateral and vertical intensity was evaluated as well. The scales of turbulence in the along-wind direction were found to vary widely between different Bora episodes and were rather different from the approximations given by standards, with the most significant deviations observed for the along-wind length scale of the vertical velocity component. Finally, the periodicity of flow structures above the valley was assessed, yielding a wide range of possible periods between 1 and 10 min, thus confirming some of the previous observations from the studies of Bora in the Vipava valley.
Najdeno v: ključnih besedah
Povzetek najdenega: ...were derived from high resolution Doppler wind lidar measurements during eight Bora wind episodes that...
Ključne besede: doppler wind lidar, Bora wind, turbulence intensity, complex terrain, turbulence integral length scale
Objavljeno: 05.11.2021; Ogledov: 114; Prenosov: 2
URL Polno besedilo (0,00 KB)
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35.
Bioaerosol partitioning between the interstitial and condensed phase in mixed-phase clouds
Griša Močnik, Mojca Benčina, Samo Stanič, Miha Živec, Tina Šantl Temkiv, 2021, prispevek na konferenci brez natisa

Najdeno v: ključnih besedah
Ključne besede: bioaerosol, aerosol, mixed-phase clouds, LIDAR
Objavljeno: 22.11.2021; Ogledov: 102; Prenosov: 2
URL Polno besedilo (0,00 KB)
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