Transformations of Aerosol Particles from an Outdoor to Indoor Environment.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F17%3A00473186" target="_blank" >RIV/67985858:_____/17:00473186 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10359321

Result on the web

<a href="http://dx.doi.org/10.4209/aaqr.2016.08.0355" target="_blank" >http://dx.doi.org/10.4209/aaqr.2016.08.0355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4209/aaqr.2016.08.0355" target="_blank" >10.4209/aaqr.2016.08.0355</a>

Result language

angličtina

Original language name

Transformations of Aerosol Particles from an Outdoor to Indoor Environment.

Original language description

Aerosol particle size and chemical composition during summer and winter were investigated in this study. An automated switching valve allowed for indoor and outdoor environments to be sampled near-simultaneously with the same high temporal-resolution instrumentation. During the study, no known indoor sources were present and the sampled room was unoccupied throughout. Accumulation mode indoor/outdoor (I/O) ratios were substantially lower in winter than in summer. This reduction was attributed to particles of outdoor origin shrinking as they entered the warmer and drier indoor environment. An essential factor in this process appeared to be the difference (gradient) between the temperature and relative humidity of the indoor and outdoor environments during the winter. Online aerosol mass spectrometer measurements recorded a 34–38% decrease in I/O ratios for all nonrefractory species during the winter relative to the summer. A similar change in I/O ratios for all species indicated that physical, rather than chemical, processes were responsible. To assess the relative influence of various physical factors on I/O relationships, Spearman rank statistical tests were carried out. These identified wind speed to be negatively correlated to the indoor concentrations for all species. Wind roses incorporating I/O ratios were applied and showed that the wind speed and direction influenced the changes in the indoor composition. The relative outdoor concentration of different aerosol species, steepness of the I/O temperature gradient, and wind speed variability are concluded to be essential factors in I/O aerosol transformations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Aerosol and Air Quality Research

ISSN

1680-8584

e-ISSN

—

Volume of the periodical

17

Issue of the periodical within the volume

3

Country of publishing house

TW - TAIWAN (PROVINCE OF CHINA)

Number of pages

13

Pages from-to

653-665

UT code for WoS article

000398198400001

EID of the result in the Scopus database

2-s2.0-85014090650