Repository logo
  • English
  • Català
  • Čeština
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • Latviešu
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Suomi
  • Svenska
  • Türkçe
  • Қазақ
  • বাংলা
  • हिंदी
  • Ελληνικά
  • Yкраї́нська
  • Log In
    or
    New user? Click here to register.Have you forgotten your password?
Repository logo
  • Communities & Collections
  • Research Outputs
  • Fundings & Projects
  • People
  • Statistics
  • English
  • Català
  • Čeština
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • Latviešu
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Suomi
  • Svenska
  • Türkçe
  • Қазақ
  • বাংলা
  • हिंदी
  • Ελληνικά
  • Yкраї́нська
  • Log In
    or
    New user? Click here to register.Have you forgotten your password?
  1. Home
  2. Indian Institute of Technology Madras
  3. Publication4
  4. Study of meteorological impact on air quality in a humid tropical urban area
 
  • Details
Options

Study of meteorological impact on air quality in a humid tropical urban area

Date Issued
01-07-2019
Author(s)
Hrishikesh, C. G.
Nagendra, S. M.Shiva
DOI
10.1007/s12040-019-1116-7
Abstract
Urban air quality is highly dynamic and influenced by micrometeorological conditions. In this paper, meteorological impact on criteria air pollutants namely sulphur dioxide (SO 2) , nitrogen dioxide (NO 2) and particulate matter (PM 10) were studied using correlation analysis at contrasting locations in the urban environment of Chennai city. Daily average air quality data from five monitoring stations during 2009–2012 were analysed. Out of the five monitoring locations, three locations (Kathivakkam, Thiruvottiyur and Manali) were categorised as industrial locations, General Hospital as a traffic intersection and Taramani as a residential location. The frequency distribution of industrial sites showed higher concentration compared to residential and traffic intersection sites (TS). The increase in annual average concentration of 15–38%, 4–52% and 5–58% was observed for SO 2, NO 2 and PM 10 over the study period, respectively, attributed to vehicular and industrial emissions. SO 2 showed high correlation with humidity (R= - 0.57) and cloud cover (R= 0.63) during summer. NO 2 showed a higher correlation with temperature (R= 0.72) during monsoon, and with humidity (R= 0.7) and cloud cover (R= 0.75) during winter. PM 10 showed moderate correlation with temperature (R= - 0.55) and wind speed (R= - 0.51) during summer. Non-parametric tests and Q–Q plot showed the distribution of SO 2 and NO 2 as Weibull and lognormal for PM 10. The wind rose plots depicted predominant wind direction in the south and south-west directions with most observations having a wind speed of ≥5m/s. The estimated national ambient air quality index was good for traffic and residential sites. Industrial sites were moderately polluted during the winter season due to high PM 10 concentration. No exceedances were observed for daily concentration of SO 2 and NO 2. Daily average PM 10 concentration showed exceedances at industrial locations Kathivakkam, Manali and Thiruvottiyur for 305 (92%), 84 (68%) and 164 (53.4%) days, respectively. At TS (General Hospital) and residential site (RS) (Taramani), lower number of exceedances was observed at 25 (13.2%) days and 11 (5.8%) days, respectively.
Volume
128
Subjects
  • correlation analysis

  • Kolmogorov–Smirnov te...

  • national air quality ...

  • Q–Q plot

  • Urban air quality

  • wind rose diagram

Indian Institute of Technology Madras Knowledge Repository developed and maintained by the Library

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science

  • Cookie settings
  • Privacy policy
  • End User Agreement
  • Send Feedback