Influence of weather types on concentrations of metallic components in airborne [PM.sub.10] in Zagreb, Croatia/Utjecaj tipova vremena na razine koncentracija metala sadrzanih u frakciji lebdecih cestica [PM.sub.10] u atmosferi iznad Zagreba

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Authors: Ivan Beslic, Kresimir Sega, Mirjana Cackovic, Zujezdana Bencetic Klaic and Visnja Vucetic
Date: Dec. 2007
From: Geofizika(Vol. 24, Issue 2)
Publisher: Sveuciliste U Zagrebu
Document Type: Report
Length: 3,451 words

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This study investigates the influence of weather types found over the continental part of Croatia on daily [PM.sub.10] concentrations and concentrations of metallic compounds in [PM.sub.10] (namely manganese, lead and cadmium) in air during 2000-2002 period. Pollutant concentrations were measured at the northern, residential part of Zagreb, far from major pollution sources. Weather types were determined from synoptic charts. In the employed categorization six different patterns were recognized: radiation weather type, high pressure ridge, precipitation weather type, southeastern advection, northeastern advection and wind weather type. The most frequently, elevated concentrations were related to radiation weather type and southeastern advection, while the lowest concentrations were recorded during the wind weather type. Obtained results generally suggest a major role of the local pollution sources, and particularly of the Zagreb industrial zone, in suspended particles/metallic compounds pollution. Since cadmium exhibits somewhat different behavior, the role of the long-range transport in cadmium pollution needs to be further investigated. Synoptic conditions favorable for elevated concentrations occurred in about 37% of investigated days. Typically, these conditions are characterized by 1) the weak winds and turbulence, and consequently, inefficient pollutant concentration dilution (the nighttime and wintertime radiative conditions); or 2) southeastern airflow (southeastern advection and daytime radiative conditions), which transports pollutants from industrial zone of Zagreb towards the measuring site. Due to the latter, particulate pollutants emitted in the industrial zone pass rather frequently above the eastern part of Zagreb.

Keywords: [PM.sub.10], lead, manganese, cadmium, local sources, long-range transport

U radu je istrazen utjecaj tipova vremena na dnevne koncentracije frakcije lebdecih cestica [PM.sub.10] to olova, mangana i kadmija sadrzanih u [PM.sub.10] u razdoblju od 2000. do zakljucno 2002. godine. Koncentracije su mjerene u sjevernom, rezidancijalnom dijelu Zagreba, podalje od vecih izvora oneciscujucih tvari. Tipovi vremena (radijacijski, greben visokog tlaka, oborinski, vjetreni to jugoistocna i sjeverozapadna advekcija), odredeni su na temelju sinoptickih karata. Povisene koncentracije primijecene su tijekom radijacijskoga tipa i jugoistocne advekcije, a najnize tijekom vjetrenoga tipa vremena. Rezultati opcenito ukazuju na vaznu ulogu lokalnih izvora oneciscenja, narocito industrijske zone. Kako je slika za kadmij donekle drugacija, u daljnjem radu potrebno je ispitati ulogu daljinskog prijenosa u oneciscennu kadmijem. Uvjeti koji pogoduju povisenim razinama oneciscenja dogodili su se tijekom promatranog razdoblja u 37% ispitanih dana, a opcenito ih karakterizira: 1) slab vjetar i slaba turbulencija, odnosno slabo razrijedivanje oneciscujuce tvari (nocu i zimi tijekom radijacijskog tipa vremena), ili 2) jugoistocno strujanje (pri jugoistocnoj advekciji to danju tijekom radijacijskog tipa) koje prenosi polutante od industrijske zone prema mjernom mjestu. Stoga oneciscujuce tvari koje su emitirane u industrijskoj zoni prilicno cesto prolaze nad istocnim dijelom Zagreba.

Mjucne rijeci: [PM.sub.10], olovo, mangan, kadmij, lokalni izvori, daljinski transport

1. Introduction

Processes governing the fate of airborne pollutants, and consequent pollution levels, can be divided into 1) production, 2) transport and dispersion, and, 3) removal processes. On the timescales from hours to days all of above processes can strongly depend on atmospheric conditions. Thus, for example, dispersion varies with turbulence intensity; wet removal depends on the precipitation intensity and duration, transport is governed...

Source Citation

Source Citation
Beslic, Ivan, et al. "Influence of weather types on concentrations of metallic components in airborne [PM.sub.10] in Zagreb, Croatia/Utjecaj tipova vremena na razine koncentracija metala sadrzanih u frakciji lebdecih cestica [PM.sub.10] u atmosferi iznad Zagreba." Geofizika, vol. 24, no. 2, Dec. 2007, pp. 93+. Accessed 27 Jan. 2022.
  

Gale Document Number: GALE|A174640883