Temperature and Relative Humidity Vertical Profiles within Planetary Boundary Layer in Winter Urban Airshed
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10367981" target="_blank" >RIV/00216208:11310/17:10367981 - isvavai.cz</a>
Result on the web
<a href="http://iopscience.iop.org/article/10.1088/1755-1315/95/5/052003/meta" target="_blank" >http://iopscience.iop.org/article/10.1088/1755-1315/95/5/052003/meta</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1755-1315/95/5/052003" target="_blank" >10.1088/1755-1315/95/5/052003</a>
Alternative languages
Result language
angličtina
Original language name
Temperature and Relative Humidity Vertical Profiles within Planetary Boundary Layer in Winter Urban Airshed
Original language description
The planetary boundary layer is a dynamic system with turbulent flow where air mixing depends mainly on the weather conditions and geomorphology. Temperature inversion situation may occur, mainly during winter. Pollutant dispersion is poor during inversions so air pollutant concentration can quickly rise, especially in urban closed valleys. Air pollution was evaluated by WHO as a human carcinogen mostly by polycyclic aromatic hydrocarbons. Knowledge about inversion layer height is important for estimation of the pollution impact and it can give us also information about the air pollution sources. The Svermov, residential district of the city of Kladno is an air pollution hot-spot for long time benzo[a]pyrene (B[a]P) limit exceedances, reaching the highest B[a]P annual concentration in Bohemia - west part of the Czech Republic. Since the Svermov sits in a shallow valley, frequent vertical temperature inversion in winter and low emission heights of pollution sources prevent pollutant dispersal off the valley. Such orography is common to numerous small settlements in the Czech Republic. Ground measurements in the Svermov were complemented by temperature and humidity vertical profiles acquired by a Vaisala radiosonde positioned at tethered He-filled balloon. Total number of 53 series of vertical profiles up to the height of 300 m was conducted. Meteorology parameters were acquired with 4 Hz frequency. The measurements confirmed frequent early-morning and night formation of temperature inversion within boundary layer up to the height of 50 m. This rather shallow inversion had significant influence on air quality due to inversion cap over the valley. Nevertheless, formation of an inversion showed strong diurnal variability. For example, on the 18th Feb. early morning shallow inversion quickly disappeared within less than 2 hours. According to this study tethered balloon measurements has proved to be a good tool for completion comprehensive ground air quality measurements.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/GBP503%2F12%2FG147" target="_blank" >GBP503/12/G147: Centre for studies on toxicity of nanoparticles</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IOP Conference Series: Earth and Environmental Science
ISSN
1755-1307
e-ISSN
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Volume of the periodical
2017
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
1-6
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-85040227326