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1.
Measurement of the optical properties of the Auger fluorescence telescopes
Julia Bäuml, Andrej Filipčič, Thomas Paul, Samo Stanič, Darko Veberič, Danilo Zavrtanik, Marko Zavrtanik, 2013, objavljeni znanstveni prispevek na konferenci

Najdeno v: osebi
Ključne besede: Observatorij Pierre Auger, kozmični žarki, fluorescenca
Objavljeno: 15.10.2013; Ogledov: 3344; Prenosov: 65
URL Polno besedilo (0,00 KB)

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Slovenska literatura med špansko govorečimi
Polona Konjedic, Barbara Pregelj, Julia Sarachu, Barbara Vuga, Susana Aliano Casales, Moisés Selfa Sastre, 2020, druge monografije in druga zaključena dela

Opis: Kako poznajo slovensko literaturo v Mehiki? O kom se učijo bodoči učitelji v Lleidi? Kaj slovenskega poznano v Urugvaju, o kom od slovenskih avtorjev predavajo na Univerzi v Buenos Airesu? Odgovore na ta vprašanja imajo Julia Sarachu, Barbara Vuga, Susana Aliano Casales, Moisés Selfa Sastre in Barbara Pregelj. Z njimi se je pogovarjala Polona Konjedic.
Najdeno v: osebi
Povzetek najdenega: ...v Buenos Airesu? Odgovore na ta vprašanja imajo Julia Sarachu, Barbara Vuga, Susana Aliano Casales, Moisés...
Ključne besede: slovenska literatura, recepcija, španščina, pogovori
Objavljeno: 05.01.2021; Ogledov: 1234; Prenosov: 6
URL Polno besedilo (0,00 KB)

4.
Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal
Jose L. Jimenez, Sasha Madronich, Rainer Volkamer, Eleanor M. Waxman, Katja Džepina, Barbara Ervens, Julia Lee-Taylor, Bernard Aumont, 2013, izvirni znanstveni članek

Opis: The role of aqueous multiphase chemistry in the formation of secondary organic aerosol (SOA) remains difficult to quantify. We investigate it here by testing the rapid formation of moderate oxygen-to-carbon (O/C) SOA during a case study in Mexico City. A novel laboratory-based glyoxal-SOA mechanism is applied to the field data, and explains why less gas-phase glyoxal mass is observed than predicted. Furthermore, we compare an explicit gas-phase chemical mechanism for SOA formation from semi- and intermediate-volatility organic compounds (S/IVOCs) with empirical parameterizations of S/IVOC aging. The mechanism representing our current understanding of chemical kinetics of S/IVOC oxidation combined with traditional SOA sources and mixing of background SOA underestimates the observed O/C by a factor of two at noon. Inclusion of glyoxal-SOA with O/C of 1.5 brings O/C predictions within measurement uncertainty, suggesting that field observations can be reconciled on reasonable time scales using laboratory-based empirical relationships for aqueous chemistry.
Najdeno v: osebi
Ključne besede: secondary organic aerosol, glyoxal, aqueous multiphase chemistry, oxygen-to-carbon ratio, single scattering albedo
Objavljeno: 11.04.2021; Ogledov: 887; Prenosov: 0
.pdf Polno besedilo (724,40 KB)

5.
Equal abundance of summertime natural and wintertime anthropogenic Arctic organic aerosols
Olga Popovicheva, Tuuka Petäjä, Andreas Massling, Jakob K. Nøjgaard, Jean-Luc Jaffrezo, Lin Huang, Heidi Hellén, Hannele Hakola, Wendy Zhang, Mika Vestenius, Henrik Skov, Sangeeta Sharma, Mirko Severi, Jürgen Schnelle-Kreis, Claire E. Moffett, Konstantinos Eleftheriadis, Giulia Calzolai, Silvia Becagli, Wenche Aas, Pragati Rai, Francesco Canonaco, Kaspar R. Daellenbach, Houssni Lamkaddam, Roberto Casotto, Deepika Bhattu, Katja Dzepina, Vaios Moschos, Rebecca J. Sheesley, Rita Traversi, Karl Espen Yttri, Julia Schmale, André S. H. Prévôt, Urs Baltensperger, Imad El Haddad, 2022, izvirni znanstveni članek

Opis: Aerosols play an important yet uncertain role in modulating the radiation balance of the sensitive Arctic atmosphere. Organic aerosol is one of the most abundant, yet least understood, fractions of the Arctic aerosol mass. Here we use data from eight observatories that represent the entire Arctic to reveal the annual cycles in anthropogenic and biogenic sources of organic aerosol. We show that during winter, the organic aerosol in the Arctic is dominated by anthropogenic emissions, mainly from Eurasia, which consist of both direct combustion emissions and long-range transported, aged pollution. In summer, the decreasing anthropogenic pollution is replaced by natural emissions. These include marine secondary, biogenic secondary and primary biological emissions, which have the potential to be important to Arctic climate by modifying the cloud condensation nuclei properties and acting as ice-nucleating particles. Their source strength or atmospheric processing is sensitive to nutrient availability, solar radiation, temperature and snow cover. Our results provide a comprehensive understanding of the current pan-Arctic organic aerosol, which can be used to support modelling efforts that aim to quantify the climate impacts of emissions in this sensitive region.
Najdeno v: osebi
Ključne besede: Arctic, Organic aerosols, Emission sources, Climate change
Objavljeno: 01.03.2022; Ogledov: 404; Prenosov: 0
.pdf Polno besedilo (1,89 MB)

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