Next Article in Journal
Impacts of In-Cabin Exposure to Size-Fractionated Particulate Matters and Carbon Monoxide on Changes in Heart Rate Variability for Healthy Public Transit Commuters
Previous Article in Journal
No Particle Mass Enhancement from Induced Atmospheric Ageing at a Rural Site in Northern Europe
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle

River-Induced Anomalies in Seasonal Variation of Traffic-Emitted CO Distribution over the City of Krasnoyarsk

1
Institute of Thermophysics of SB RAS, Lavrentiev Ave. 1, 630090 Novosibirsk, Russia
2
Chemical Engineering Department, Delft University of Technology, Bld. 58, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(7), 407; https://doi.org/10.3390/atmos10070407
Received: 14 June 2019 / Revised: 10 July 2019 / Accepted: 11 July 2019 / Published: 17 July 2019
(This article belongs to the Section Air Quality)
  |  
PDF [9794 KB, uploaded 18 July 2019]
  |  

Abstract

Seasonal variation of air quality in a city with a large river was investigated by means of numerical simulations of air movement and pollutant dispersion over inversion-capped diurnal cycles using a Reynolds-averaged Navier–Stokes (RANS) approach with algebraic turbulent flux model. The study accounts for the effects of urban heat island (UHI), terrain orography and high thermal inertia of the river body. The case mimics the real environment of the Krasnoyarsk region with the river Yenisei (Russia). Two scenarios were considered typical of the winter and summer seasons. The study is focused on the dynamics of dispersion of CO emanating mainly from road traffic, which remains fairly uniform throughout the year. The simulation starts from a mild low-altitude inversion with penetrative convection gradually developing over the daytime and attenuating during the night. The main difference between the two cases is in the temperature of the river surface relative to the ambient air. In winter, the non-freezing river acts as a source of positive thermal buoyancy, while in summer the cool river at the daytime acts in the opposite way, as a heat sink. The effect of the river-induced air circulation appears significant enough to account for the observed winter accumulation of the pollutant in the city center. View Full-Text
Keywords: atmospheric boundary layer; diurnal convection; seasonal variation; pollutants dispersion; Reynolds-averaged Navier–Stokes modelling atmospheric boundary layer; diurnal convection; seasonal variation; pollutants dispersion; Reynolds-averaged Navier–Stokes modelling
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Hrebtov, M.; Hanjalić, K. River-Induced Anomalies in Seasonal Variation of Traffic-Emitted CO Distribution over the City of Krasnoyarsk. Atmosphere 2019, 10, 407.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Atmosphere EISSN 2073-4433 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top