A dramatic shift in CO and CH4 levels at urban locations in Korea after the implementation of the Natural Gas Vehicle Supply (NGVS) program

Hang Thi Nguyen, Ki Hyun Kim, C. J. Ma, S. J. Cho, Jong Ryeul Sohn

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Concentrations of carbon monoxide (CO) and methane (CH4) in air were measured at both urban roadside (U-RS) and urban background (U-BG) stations in Seoul, Korea over an 11 yr period (1996-2006). The overall mean values of CO were 1.16±0.63 (U-RS) and 1.08±0.77 ppm (U-BG), while those of CH4 were 2.24±0.42 (U-RS) and 2.06±0.31 ppm (U-BG). The diurnal patterns of CO tended to peak near rush hour, while those of CH4 showed increases at night. An examination of the seasonal data showed that the CO values were consistently higher during winter, while CH4 values were highly variable across seasons with relatively large spatial variations. Because of the noticeable change in air quality parameters after the year 2000, the mean data for both compounds were examined between 1996-2000 (period I) and 2001-2006 (period II). The analysis of long-term trends revealed that the concentrations of both compounds decreased very rapidly during period I, while changes were not significant during period II. The results of this comparative study confirm that both urban locations have experienced dramatic changes in the major pollutant levels, particularly in CO after the implementation of the Natural Gas Vehicle Supply (NGVS) program.

Original languageEnglish
Pages (from-to)396-409
Number of pages14
JournalEnvironmental Research
Volume110
Issue number4
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Natural gas vehicles
Natural Gas
Carbon Monoxide
Korea
carbon monoxide
natural gas
Roadsides
Air
Methane
Air quality
comparative study
air quality
spatial variation
methane
programme
vehicle
winter
air

Keywords

  • Carbon monoxide
  • Long-term
  • Methane
  • Natural gas vehicle
  • Urban roadside

ASJC Scopus subject areas

  • Environmental Science(all)
  • Biochemistry

Cite this

A dramatic shift in CO and CH4 levels at urban locations in Korea after the implementation of the Natural Gas Vehicle Supply (NGVS) program. / Thi Nguyen, Hang; Kim, Ki Hyun; Ma, C. J.; Cho, S. J.; Sohn, Jong Ryeul.

In: Environmental Research, Vol. 110, No. 4, 01.05.2010, p. 396-409.

Research output: Contribution to journalArticle

@article{72d194660512423a94f1de25f46115ad,
title = "A dramatic shift in CO and CH4 levels at urban locations in Korea after the implementation of the Natural Gas Vehicle Supply (NGVS) program",
abstract = "Concentrations of carbon monoxide (CO) and methane (CH4) in air were measured at both urban roadside (U-RS) and urban background (U-BG) stations in Seoul, Korea over an 11 yr period (1996-2006). The overall mean values of CO were 1.16±0.63 (U-RS) and 1.08±0.77 ppm (U-BG), while those of CH4 were 2.24±0.42 (U-RS) and 2.06±0.31 ppm (U-BG). The diurnal patterns of CO tended to peak near rush hour, while those of CH4 showed increases at night. An examination of the seasonal data showed that the CO values were consistently higher during winter, while CH4 values were highly variable across seasons with relatively large spatial variations. Because of the noticeable change in air quality parameters after the year 2000, the mean data for both compounds were examined between 1996-2000 (period I) and 2001-2006 (period II). The analysis of long-term trends revealed that the concentrations of both compounds decreased very rapidly during period I, while changes were not significant during period II. The results of this comparative study confirm that both urban locations have experienced dramatic changes in the major pollutant levels, particularly in CO after the implementation of the Natural Gas Vehicle Supply (NGVS) program.",
keywords = "Carbon monoxide, Long-term, Methane, Natural gas vehicle, Urban roadside",
author = "{Thi Nguyen}, Hang and Kim, {Ki Hyun} and Ma, {C. J.} and Cho, {S. J.} and Sohn, {Jong Ryeul}",
year = "2010",
month = "5",
day = "1",
doi = "10.1016/j.envres.2010.03.002",
language = "English",
volume = "110",
pages = "396--409",
journal = "Environmental Research",
issn = "0013-9351",
publisher = "Academic Press Inc.",
number = "4",

}

TY - JOUR

T1 - A dramatic shift in CO and CH4 levels at urban locations in Korea after the implementation of the Natural Gas Vehicle Supply (NGVS) program

AU - Thi Nguyen, Hang

AU - Kim, Ki Hyun

AU - Ma, C. J.

AU - Cho, S. J.

AU - Sohn, Jong Ryeul

PY - 2010/5/1

Y1 - 2010/5/1

N2 - Concentrations of carbon monoxide (CO) and methane (CH4) in air were measured at both urban roadside (U-RS) and urban background (U-BG) stations in Seoul, Korea over an 11 yr period (1996-2006). The overall mean values of CO were 1.16±0.63 (U-RS) and 1.08±0.77 ppm (U-BG), while those of CH4 were 2.24±0.42 (U-RS) and 2.06±0.31 ppm (U-BG). The diurnal patterns of CO tended to peak near rush hour, while those of CH4 showed increases at night. An examination of the seasonal data showed that the CO values were consistently higher during winter, while CH4 values were highly variable across seasons with relatively large spatial variations. Because of the noticeable change in air quality parameters after the year 2000, the mean data for both compounds were examined between 1996-2000 (period I) and 2001-2006 (period II). The analysis of long-term trends revealed that the concentrations of both compounds decreased very rapidly during period I, while changes were not significant during period II. The results of this comparative study confirm that both urban locations have experienced dramatic changes in the major pollutant levels, particularly in CO after the implementation of the Natural Gas Vehicle Supply (NGVS) program.

AB - Concentrations of carbon monoxide (CO) and methane (CH4) in air were measured at both urban roadside (U-RS) and urban background (U-BG) stations in Seoul, Korea over an 11 yr period (1996-2006). The overall mean values of CO were 1.16±0.63 (U-RS) and 1.08±0.77 ppm (U-BG), while those of CH4 were 2.24±0.42 (U-RS) and 2.06±0.31 ppm (U-BG). The diurnal patterns of CO tended to peak near rush hour, while those of CH4 showed increases at night. An examination of the seasonal data showed that the CO values were consistently higher during winter, while CH4 values were highly variable across seasons with relatively large spatial variations. Because of the noticeable change in air quality parameters after the year 2000, the mean data for both compounds were examined between 1996-2000 (period I) and 2001-2006 (period II). The analysis of long-term trends revealed that the concentrations of both compounds decreased very rapidly during period I, while changes were not significant during period II. The results of this comparative study confirm that both urban locations have experienced dramatic changes in the major pollutant levels, particularly in CO after the implementation of the Natural Gas Vehicle Supply (NGVS) program.

KW - Carbon monoxide

KW - Long-term

KW - Methane

KW - Natural gas vehicle

KW - Urban roadside

UR - http://www.scopus.com/inward/record.url?scp=77950866697&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950866697&partnerID=8YFLogxK

U2 - 10.1016/j.envres.2010.03.002

DO - 10.1016/j.envres.2010.03.002

M3 - Article

C2 - 20363470

AN - SCOPUS:77950866697

VL - 110

SP - 396

EP - 409

JO - Environmental Research

JF - Environmental Research

SN - 0013-9351

IS - 4

ER -