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Primerjava diferencialne optične absorbcijske spektroskopije (DOAS) in točkovnih metod meritev onesnaženosti zrakaTavčar, Josip ; Lukan, Benjamin ; Franko, MladenDiferencialna optična absorpcijska spektroskopija (DOAS) omogoča kontinuirane meritve povprečnih koncentracij vrste atmosferskih polutantov vzdolž izbrane optične poti (nekaj 100 m). To jo razlikuje ... od konvencionalnih metod za meritev onesnaženosti zraka, ki slonijo na zajemanju zraka na posamezni lokaciji. Primerjava dveh tehnik in ocena DOAS metode je zaradi tega zelo težavna. V tem prispevku so obravnavani rezultati kontinuiranih meritev opravljenih v Mariboru med januarjem 1997 in februarjem 1998. Namen naloge je bil primerjati rezultate pridobljene z DOAS metodo z rezultati pridobljenimi z instrumenti lociranimi v ANAS avtomatski ekološko-meteorološki postaji v Mariboru. Rezultati meritev SO2, NO2, O3 in BTX so predstavljeni in primerjani glede na vpliv lokalnih virov onesnaženosti, meteorolških in vremenskih parametrov kot so: temperatura, smer in hitrost vetra, padavine, relativno vlažnost in sončno obsevanje. V celoti, rezultati DOAS in konvencionalnih meritev kažejo dobro korelacijo. Nekoliko višje DOAS vrednosti lahko pripišemo vplivu prometa, ki v večji meri vpliva na povečanje koncentracij onesnaževalcev vzdolž izbrane optične poti in manj na koncentracije na lokaciji ANAS postaje. Večje razlike je opaziti tekom zime v pogojih nizke vidljivosti. Znižanje svetlobne intenzitete, zaradi sipanja in absorpcijske svetlobe pa poleg občasnega izpada podatkov vpliva tudi na natančnost meritev, ki se z zmanjšanjem svetlobne intenzitete zmanjšuje.Source: Zbornik referatov s posvetovanja (Str. 478-484)Type of material - conference contributionPublish date - 1999Language - slovenianCOBISS.SI-ID - 4778262
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Lukan, Benjamin | 12326 |
Franko, Mladen | 04537 |
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