Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and influence of Asian outflows

J. Han, B. Shin, Meehye Lee, G. Hwang, J. Kim, J. Shim, G. Lee, C. Shim

Research output: Contribution to journalArticle

Abstract

Ieodo Ocean Research Station (IORS), a research tower (∼ 40 ma.s.l.) for atmospheric and oceanographic observations, is located in the East China Sea (32.07° N, 125.10° E). The IORS is almost equidistant from South Korea, China, and Japan and, therefore, it is an ideal place to observe Asian outflows without local emission effects. The average ozone concentrations were 51.8 ± 15.9 ppbv during June 2003-December 2010. The seasonal variation of ozone was distinct, with a summer minimum (37.8 ppbv) and a spring maximum (61.1 ppbv), and was largely affected by seasonal wind pattern over East Asia. The fractional contribution of ozone at IORS could be attributed to six well distinguished air masses that were classified by the cluster analysis of backward trajectories. Marine air from the Pacific Ocean represents a relatively clean background air with a lowest ozone level of 32.2 ppbv in summer. In spring and winter the influence of Chinese outflows was dominant with higher ozone concentrations of 61.6 and 49.3 ppbv, respectively. This study confirms that the influence of Chinese outflows was the main factor determining O3 levels at IORS, of which extent was apt to be changed by meteorological state, particularly at a long-term scale.

Original languageEnglish
Pages (from-to)16747-16774
Number of pages28
JournalAtmospheric Chemistry and Physics Discussions
Volume15
Issue number12
DOIs
Publication statusPublished - 2015 Jun 19

Fingerprint

ozone
China
oceans
outflow
stations
ocean
summer
South Korea
cluster analysis
Pacific Ocean
air masses
air
towers
annual variations
air mass
winter
Japan
seasonal variation
trajectory
station

ASJC Scopus subject areas

  • Atmospheric Science
  • Space and Planetary Science

Cite this

Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and influence of Asian outflows. / Han, J.; Shin, B.; Lee, Meehye; Hwang, G.; Kim, J.; Shim, J.; Lee, G.; Shim, C.

In: Atmospheric Chemistry and Physics Discussions, Vol. 15, No. 12, 19.06.2015, p. 16747-16774.

Research output: Contribution to journalArticle

Han, J. ; Shin, B. ; Lee, Meehye ; Hwang, G. ; Kim, J. ; Shim, J. ; Lee, G. ; Shim, C. / Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and influence of Asian outflows. In: Atmospheric Chemistry and Physics Discussions. 2015 ; Vol. 15, No. 12. pp. 16747-16774.
@article{cfd466b82b4f40868cd2de1b61b708f4,
title = "Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and influence of Asian outflows",
abstract = "Ieodo Ocean Research Station (IORS), a research tower (∼ 40 ma.s.l.) for atmospheric and oceanographic observations, is located in the East China Sea (32.07° N, 125.10° E). The IORS is almost equidistant from South Korea, China, and Japan and, therefore, it is an ideal place to observe Asian outflows without local emission effects. The average ozone concentrations were 51.8 ± 15.9 ppbv during June 2003-December 2010. The seasonal variation of ozone was distinct, with a summer minimum (37.8 ppbv) and a spring maximum (61.1 ppbv), and was largely affected by seasonal wind pattern over East Asia. The fractional contribution of ozone at IORS could be attributed to six well distinguished air masses that were classified by the cluster analysis of backward trajectories. Marine air from the Pacific Ocean represents a relatively clean background air with a lowest ozone level of 32.2 ppbv in summer. In spring and winter the influence of Chinese outflows was dominant with higher ozone concentrations of 61.6 and 49.3 ppbv, respectively. This study confirms that the influence of Chinese outflows was the main factor determining O3 levels at IORS, of which extent was apt to be changed by meteorological state, particularly at a long-term scale.",
author = "J. Han and B. Shin and Meehye Lee and G. Hwang and J. Kim and J. Shim and G. Lee and C. Shim",
year = "2015",
month = "6",
day = "19",
doi = "10.5194/acpd-15-16747-2015",
language = "English",
volume = "15",
pages = "16747--16774",
journal = "Atmospheric Chemistry and Physics Discussions",
issn = "1680-7367",
publisher = "Copernicus GmbH",
number = "12",

}

TY - JOUR

T1 - Variations of surface ozone at Ieodo Ocean Research Station in the East China Sea and influence of Asian outflows

AU - Han, J.

AU - Shin, B.

AU - Lee, Meehye

AU - Hwang, G.

AU - Kim, J.

AU - Shim, J.

AU - Lee, G.

AU - Shim, C.

PY - 2015/6/19

Y1 - 2015/6/19

N2 - Ieodo Ocean Research Station (IORS), a research tower (∼ 40 ma.s.l.) for atmospheric and oceanographic observations, is located in the East China Sea (32.07° N, 125.10° E). The IORS is almost equidistant from South Korea, China, and Japan and, therefore, it is an ideal place to observe Asian outflows without local emission effects. The average ozone concentrations were 51.8 ± 15.9 ppbv during June 2003-December 2010. The seasonal variation of ozone was distinct, with a summer minimum (37.8 ppbv) and a spring maximum (61.1 ppbv), and was largely affected by seasonal wind pattern over East Asia. The fractional contribution of ozone at IORS could be attributed to six well distinguished air masses that were classified by the cluster analysis of backward trajectories. Marine air from the Pacific Ocean represents a relatively clean background air with a lowest ozone level of 32.2 ppbv in summer. In spring and winter the influence of Chinese outflows was dominant with higher ozone concentrations of 61.6 and 49.3 ppbv, respectively. This study confirms that the influence of Chinese outflows was the main factor determining O3 levels at IORS, of which extent was apt to be changed by meteorological state, particularly at a long-term scale.

AB - Ieodo Ocean Research Station (IORS), a research tower (∼ 40 ma.s.l.) for atmospheric and oceanographic observations, is located in the East China Sea (32.07° N, 125.10° E). The IORS is almost equidistant from South Korea, China, and Japan and, therefore, it is an ideal place to observe Asian outflows without local emission effects. The average ozone concentrations were 51.8 ± 15.9 ppbv during June 2003-December 2010. The seasonal variation of ozone was distinct, with a summer minimum (37.8 ppbv) and a spring maximum (61.1 ppbv), and was largely affected by seasonal wind pattern over East Asia. The fractional contribution of ozone at IORS could be attributed to six well distinguished air masses that were classified by the cluster analysis of backward trajectories. Marine air from the Pacific Ocean represents a relatively clean background air with a lowest ozone level of 32.2 ppbv in summer. In spring and winter the influence of Chinese outflows was dominant with higher ozone concentrations of 61.6 and 49.3 ppbv, respectively. This study confirms that the influence of Chinese outflows was the main factor determining O3 levels at IORS, of which extent was apt to be changed by meteorological state, particularly at a long-term scale.

UR - http://www.scopus.com/inward/record.url?scp=85042738653&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85042738653&partnerID=8YFLogxK

U2 - 10.5194/acpd-15-16747-2015

DO - 10.5194/acpd-15-16747-2015

M3 - Article

VL - 15

SP - 16747

EP - 16774

JO - Atmospheric Chemistry and Physics Discussions

JF - Atmospheric Chemistry and Physics Discussions

SN - 1680-7367

IS - 12

ER -