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Title:Občutljivost modela za določanje virov aerosoliziranega črnega ogljika na izbrane vhodne parametre
Authors:ID Močnik, Griša (Mentor) More about this mentor... New window
ID Bizjak, Tine (Author)
Files:.pdf Tine_Bizjak.pdf (4,23 MB)
MD5: B1926C77ADB5A2A7771018B6E9C5A913
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FZO - Faculty of Environmental Sciences
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
Place of publishing:Nova Gorica
Year of publishing:2016
PID:20.500.12556/RUNG-2067 New window
COBISS.SI-ID:4116219 New window
NUK URN:URN:SI:UNG:REP:HJWATO0F
Publication date in RUNG:20.01.2016
Views:7630
Downloads:285
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Secondary language

Language:English
Title:The sensitivity of the model for determination of aerosol black carbon sources to selected input parameters
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.
Keywords:black carbon, aethalometer model, sensitivity, DECOMBIO


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