Number Concentrations and Modal Structure of Indoor/Outdoor Fine Particles in Four European Cities.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00469251" target="_blank" >RIV/67985858:_____/17:00469251 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4209/aaqr.2015.04.0267" target="_blank" >http://dx.doi.org/10.4209/aaqr.2015.04.0267</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4209/aaqr.2015.04.0267" target="_blank" >10.4209/aaqr.2015.04.0267</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Number Concentrations and Modal Structure of Indoor/Outdoor Fine Particles in Four European Cities.

Popis výsledku v původním jazyce

Indoor/outdoor aerosol size distribution was measured in four European cities (Oslo–Norway, Prague–Czech Republic, Milan–Italy and Athens–Greece) during 2002 in order to examine the differences in the characteristics of the indoor/outdoor modal structure and to evaluate the effect of indoor sources to the aerosol size distributions. All the measurement sites were naturally ventilated and were occupied during the campaigns by permanent residents or for certain time periods by the technical staff responsible for the instrumentation. Outdoor particle number (PN) concentrations presented the higher values in Milan and Athens (median values 1.4×104 #/cm3and 2.9×104 #/cm3 respectively) as a result of elevated outdoor emissions and led to correspondingly higher indoor values compared to Oslo and Prague. In absence of indoor activities, the indoor concentrations followed the fluctuations of the outdoor concentrations in all the measurement sites. Indoor activities (cooking, smoking, etc) resulted in elevated indoor PN concentrations (maximum values ranging between 1.7×105 #/cm3 and 3.2×105 #/cm3) and to I/O ratios higher than one. The I/O ratios were size dependant and for periods without indoor activities they presented the lowest values for particles <50 nm (0.51±0.15) and the ratios increased with fine particle size (0.79±0.12 for particles between 100-200 nm). The analysis of the modal structure showed that the indoor aerosol size distribution characteristics differ from the outdoors under the effect of indoor sources. The percentage of unimodal size distributions increased during indoor emissions, compared to periods without indoor sources, along with the number concentration of Aitken mode particles, indicating emissions in specific size ranges according to the type of the indoor source.

Název v anglickém jazyce

Number Concentrations and Modal Structure of Indoor/Outdoor Fine Particles in Four European Cities.

Popis výsledku anglicky

Indoor/outdoor aerosol size distribution was measured in four European cities (Oslo–Norway, Prague–Czech Republic, Milan–Italy and Athens–Greece) during 2002 in order to examine the differences in the characteristics of the indoor/outdoor modal structure and to evaluate the effect of indoor sources to the aerosol size distributions. All the measurement sites were naturally ventilated and were occupied during the campaigns by permanent residents or for certain time periods by the technical staff responsible for the instrumentation. Outdoor particle number (PN) concentrations presented the higher values in Milan and Athens (median values 1.4×104 #/cm3and 2.9×104 #/cm3 respectively) as a result of elevated outdoor emissions and led to correspondingly higher indoor values compared to Oslo and Prague. In absence of indoor activities, the indoor concentrations followed the fluctuations of the outdoor concentrations in all the measurement sites. Indoor activities (cooking, smoking, etc) resulted in elevated indoor PN concentrations (maximum values ranging between 1.7×105 #/cm3 and 3.2×105 #/cm3) and to I/O ratios higher than one. The I/O ratios were size dependant and for periods without indoor activities they presented the lowest values for particles <50 nm (0.51±0.15) and the ratios increased with fine particle size (0.79±0.12 for particles between 100-200 nm). The analysis of the modal structure showed that the indoor aerosol size distribution characteristics differ from the outdoors under the effect of indoor sources. The percentage of unimodal size distributions increased during indoor emissions, compared to periods without indoor sources, along with the number concentration of Aitken mode particles, indicating emissions in specific size ranges according to the type of the indoor source.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Aerosol and Air Quality Research

ISSN

1680-8584

e-ISSN

—

Svazek periodika

17

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

TW - Čínská republika (Tchaj-wan)

Počet stran výsledku

16

Strana od-do

131-146

Kód UT WoS článku

000392311500012

EID výsledku v databázi Scopus

2-s2.0-85008198021