Organska tvar i sumporni spojevi u površinskom mikrosloju i atmosferskim lebdećim česticama na obalnom području srednjeg Jadrana (Rogozničko jezero)

doctoral thesis

• Title (english): Organic matter and sulfur species in the surface microlayer and atmospheric particulate matter in the coastal area of the Middle Adriatic (Rogoznica Lake)
• Author: Ana Cvitešić Kušan
• Mentor: Irena Ciglenečki-Jušić (mentor)
• Mentor: Sanja Frka Milosavljević (mentor)
• Committee member: Gordana Pehnec (predsjednik povjerenstva)
• Committee member: Katja Džepina (član povjerenstva)
• Committee member: Slađana Strmečki Kos (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2020-07-03, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Interdisciplinary Natural Sciences; Marine Science
• Universal decimal classification (UDC): 55 - Geology. Meteorology. Hydrology

Abstract

Ovaj rad predstavlja prvu interdisciplinarnu studiju koja obuhvaća sustavno dvogodišnje
istraživanje površinskog sloja morskog jezera i finih atmosferskih lebdećih čestica
aerodinamičkog promjera aerodinamičkog promjera < 2,5μm (eng. fine particulate matter, PM2,5)
na području Rogozničkog jezera (srednji Jadran) s ciljem dobivanja uvida u porijeklo, svojstva i
raspodjelu organske tvari (OT) i sumpornih spojeva između površinskog sloja i atmosfere.
Kompleksni analitički pristup primjenjen je u karakterizaciji OT i ionskog sastava PM2,5 i
površinskih slojeva Rogozničkog jezera s posebnim naglaskom na organosumporne spojeve
(OS). Dobiveni rezultati ukazuju kako je koncentracija i kemijski sastav PM2,5 na istraživanom
području pod utjecajem meteoroloških uvjeta, dalekosežnog prijenosa zračnih masa,
lokalnih/regionalnih emisija uslijed otvorenih požara te neposrednih emisija S spojeva za vrijeme
izmješavanja jezera i uspostavljanja holomiksičnih uvjeta. Također, zaključeno je da najviši udio
u PM2,5 čine ionske vrste među kojima dominiraju morske soli te sekundarni SO4
2- dominantno antropogenog porijekla. Međutim, tijekom proljeća i ljeta intenzivna aktivnost fitoplanktonske
zajednice te posljedično i akumulirana OT površinskih slojeva istraživanog morskog jezera
mogu utjecati na promjenu kemijskog sastava i svojstava PM2,5 kroz sekundarne, ali i primarne
procese emisija.

Abstract (english)

This thesis represents the first interdisciplinary study comprising the comprehensive analyses of
the surface microlayer (SML) of the marine Rogoznica Lake and fine atmospheric particulate
matter (PM with an aerodynamic diameter < 2.5 μm, PM2.5) during 2-year period at the Middle
Adriatic (Rogoznica Lake area), to get an insight into the properties and sources, as well as the
distribution of organic matter (OM) and sulfur species between the surface microlayer of the
Lake and the atmosphere. A complex analytical approach was applied in order to characterize
OM and ionic constituents of the PM2.5 as well as of the SML, with the special emphasis on the
organosulfur compounds (OS). Obtained results indicate that meteorological conditions, longrange
transport of air masses and regional/local emissions from open-fire events as well as direct
volatilization of S compounds during mixing of the lake water column impact the PM2.5
concentration and chemstry at the studied location. Results show that water soluble ions
constitute the most of PM2.5 with the highest contribution of the sea salts and secondary SO4
2- being dominantly of anthropogenic origin. However, during spring and summer enhanced
phytoplankton activity and the consequent OM accumulated within the SML of the Rogoznica
Lake could impact the chemical composition and PM2.5 properties through secondary as well as
primary emission processes.

• Keywords: PM2.5; površinski mikrosloj; organska tvar; Rogozničko jezero; sumporni spojevi
• Keywords (english): PM2.5; surface microlayer; organic matter; Rogoznica Lake; sulfur species
• Language: croatian
• URN:NBN: urn:nbn:hr:217:650538
• Study programme: Title: Interdisciplinary doctoral study in Oceanology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje interdisciplinarne prirodne znanosti (znanost o moru) (doktor/doktorica znanosti, područje prirodnih znanosti, polje interdisciplinarne prirodne znanosti (znanost o moru))
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2022-07-03
• Created on: 2021-02-02 13:15:31