diplomsko delo
Tine Bizjak (Author), Griša Močnik (Mentor)

Abstract

Z obdelavo podatkov meritev v okviru projekta DECOMBIO v treh krajih (Chamonix, Passy, Marnaz) doline reke Arve v Franciji smo določili nihanje koncentracije črnega ogljika (ČO). Z uporabo aethalometrskega modela smo določili prispevke ČO, ki izvira iz uporabe fosilnih goriv (ČOf) in ČO, katerega vir je kurjenje biomase (ČOb). Naredili smo raziskavo občutljivosti aethalometrskega modela na izbrane kombinacije vhodnih parametrov α (Ångströmov absorpcijski eksponent) za fosilna goriva (αf) in biomaso (αb). S pomočjo podatkov meritev dnevne koncentracije levoglukozana smo za vse tri kraje določili najustreznejšo kombinacijo αf in αb. Za kraj Marnaz smo naredili raziskavo vpliva dnevnih temperatur zraka in količine padavin na nihanje koncentracije ČO. Ugotovili smo, da je nihanje koncentracije ČO, ČOb in ČOf opazno med dnevom, odvisno od letnega časa in se razlikuje med delavniki in nedeljami. V zimskem obdobju je povprečen prispevek ČOb okoli 40 %. V poletnem obdobju prevladuje ČOf. Aethalometrski model je bolj občutljiv na izbiro αb v zimskem času, poleti je zaradi manjšega prispevka ČOb bolj pomembna izbira primerne vrednosti αf. Najustreznejše vrednosti parametrov αf in αb se ujemajo z vrednostmi v drugih raziskavah in najpogosteje uporabljenimi vrednostmi αf = 1 in αb = 2. Padavine in temperatura zraka vplivata na nihanje koncentracije ČO, ČOf in ČOb.

Keywords

črni ogljik;aethalometrski model;občutljivost;DECOMBIO;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UNG FZO - Faculty of Environmental Sciences
Publisher: [T. Bizjak]
UDC: 502.1
COBISS: 4116219 Link will open in a new window
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Downloads: 267
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Other data

Secondary language: English
Secondary title: The sensitivity of the model for determination of aerosol black carbon sources to selected input parameters
Secondary abstract: We determined the changes in black carbon (BC) concentration by processing the data obtained by DECOMBIO project measurements in three locations (Chamonix, Passy, Marnaz) in Arve valley, France. We used Aethalometer model for the determination of BC contribution, resulting from the use of fossil fuels (BCf) and contribution of BC, that originates from biomass burning (BCb). We did the sensitivity analysis of the Aethalometer model to selected combinations of input parameters α (Ångström absorption exponent) for fossil fuels (αf) and biomass (αb). We determined the optimal combination of αf and αb, with respect to the daily levoglucosan concentration data. We studied the effect of daily air temperatures and precipitation on the BC concentration in Marnaz. The variations in BC, BCf and BCb are noticeable during the day, depend on the season and are different between workdays and Sundays. During winter the contribution of BCb is around 40 %. The contribution of BCf dominates in the summer. In winter the Aethalometer model is highly sensitive to the use of the appropriate value of αb. Due to lower contribution of BCb it is more important to choose the appropriate value of αf in the summer. The most appropriate values of αf and αb are consistent with the values obtained in other studies and with the most commonly used values (αf = 1 and αb = 2). The concentration of BC, BCf and BCb is affected by air temperature fluctuations and precipitation.
Secondary keywords: black carbon;aethalometer model;sensitivity;DECOMBIO;
URN: URN:SI:UNG
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Novi Gorici, Fak. za znanosti o okolju
Pages: XIV, 73 str., [43] str. pril.
ID: 9120168