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

Han, Jeong Sik; Shin, B.; Lee, M.; Hwang, Gong-Do; Kim, J.; Shim, Jae-Seol; Lee, G.; Shim, Changsub

doi:10.5194/acp-15-12611-2015

Cited by 12 publications

(9 citation statements)

References 55 publications

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“…The Amazon Tall Tower Observatory (ATTO) was established ∼ 150 km northeast of the city of Manaus, Brazil for comprehensive studies of meteorology (Morton et al, 2014;Quesada et al, 2012;Sun et al, 2011), trace gases (Andreae et al, 2012;Trebs et al, 2012), aerosol compositions (Andreae et al, 2012;Yáñez-Serrano et al, 2018;Rizzo et al, 2013;Saturno et al, 2018), and ecology (Pöhlker et al, 2019;Quesada et al, 2012) to investigate long-term trends of the Amazonian hydrological and biogeochemical cycling linked with the human perturbation (Andreae et al, 2015). The 304 m tower of the Zotino Tall Tower Observatory (ZOTTO) in central Siberia serves as a basis for monitoring biogeochemical gases (Chi et al, 2013;Mikhailov et al, 2017;Winderlich et al, 2010), aerosol characteristics (Chi et al, 2013;Heintzenberg et al, 2011;Mikhailov et al, 2017) and atmospheric transport (Mikhailov et al, 2017) at a wide range of spatial and temporal scales.…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of particle-phase dicarboxylic acids, oxoacids and α-dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing

et al. 2020

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Abstract. Vertical distributions of dicarboxylic acids, oxoacids, α-dicarbonyls and other organic tracer compounds in fine aerosols (PM2.5) were investigated at three heights (8, 120 and 260 m) based on a 325 m meteorological tower in urban Beijing in the summer of 2015. Results showed that the concentrations of oxalic acid (C2), the predominant diacid, were more abundant at 120 m (210±154 ng m−3) and 260 m (220±140 ng m−3) than those at the ground surface (160±90 ng m−3). Concentrations of phthalic acid (Ph) decreased with the increase in height, indicating that local vehicular exhausts were the main contributor. Positive correlations were noteworthy for C2 ∕ total diacids with mass ratios of C2 to main oxoacids (Pyr and ωC2) and α-dicarbonyls (Gly and MeGly) in polluted days (0.42≤r2≤0.65), especially at the ground level. In clean days, the ratios of carbon content in oxalic acid to water-soluble organic carbon (C2−C ∕ WSOC) showed larger values at 120 and 260 m than those at the ground surface. However, in polluted days, the C2−C ∕ WSOC ratio mainly reached its maximum at ground level. These phenomena may indicate the enhanced contribution of aqueous-phase oxidation to oxalic acid in polluted days. Combined with the influence of wind field, total diacids, oxoacids and α-dicarbonyls decreased by 22 %–58 % under the control on anthropogenic activities during the 2015 Victory Parade period. Furthermore, the positive matrix factorisation (PMF) results showed that the secondary formation routes (secondary sulfate formation and secondary nitrate formation) were the dominant contributors (37 %–44 %) to organic acids, followed by biomass burning (25 %–30 %) and motor vehicles (18 %–24 %). In this study, the organic acids at ground level were largely associated with local traffic emissions, while the long-range atmospheric transport followed by photochemical ageing contributed more to diacids and related compounds in the urban boundary layer than the ground surface in Beijing.

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Section: Introductionmentioning

confidence: 99%

Vertical distribution of particle-phase dicarboxylic acids, oxoacids and α-dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing

et al. 2020

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“…Meteorological parameters, especially winds that are important for O 3 outflow, also exhibit variations on different timescales (Chang et al, 2000;Ding et al, 2008b;Sun et al, 2009;Zhang and Guo, 2010;Hirahara et al, 2012). Large IAVs in the East Asian summer monsoon (EASM) have been reported in previous studies (Zhu et al, 2012;Yang et al, 2014).…”

Section: Introductionmentioning

confidence: 87%

“…They also reported that the decrease in ozone-rich Eurasian airflow reaching the eastern North Pacific in spring in the 2000s was attributed to more frequent La Niña events. Most of the models in the Coupled Model Intercomparison Project Phase 3 (CMIP3) predicted that the Asian jet would be intensified on its equatorward side by the end of the 21st century (Zhang and Guo, 2010;Hirahara et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Interannual variation, decadal trend, and future change in ozone outflow from East Asia

et al. 2017

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Abstract. We examine the past and future changes in the O3 outflow from East Asia using a global 3-D chemical transport model, GEOS-Chem. The simulations of Asian O3 outflow for 1986–2006 are driven by the assimilated GEOS-4 meteorological fields, and those for 2000–2050 are driven by the meteorological fields archived by the NASA Goddard Institute for Space Studies (GISS) general circulation model (GCM) 3 under the IPCC SRES A1B scenario. The evaluation of the model results against measurements shows that the GEOS-Chem model captures the seasonal cycles and interannual variations of tropospheric O3 concentrations fairly well with high correlation coefficients of 0.82–0.93 at four ground-based sites and 0.55–0.88 at two ozonesonde sites where observations are available. The increasing trends in surface-layer O3 concentrations in East Asia over the past 2 decades are captured by the model, although the modeled O3 trends have low biases. Sensitivity studies are conducted to examine the respective impacts of meteorological parameters and emissions on the variations in the outflow flux of O3. When both meteorological parameters and anthropogenic emissions varied from 1986–2006, the simulated Asian O3 outflow fluxes exhibited a statistically insignificant decadal trend; however, they showed large interannual variations (IAVs) with seasonal values of 4–9 % for the absolute percent departure from the mean (APDM) and an annual APDM value of 3.3 %. The sensitivity simulations indicated that the large IAVs in O3 outflow fluxes were mainly caused by variations in the meteorological conditions. The variations in meteorological parameters drove the IAVs in O3 outflow fluxes by altering the O3 concentrations over East Asia and by altering the zonal winds; the latter was identified to be the key factor, since the O3 outflow was highly correlated with zonal winds from 1986–2006. The simulations of the 2000–2050 changes show that the annual outflow flux of O3 will increase by 2.0, 7.9, and 12.2 % owing to climate change alone, emissions change alone, and changes in both climate and emissions, respectively. Therefore, climate change will aggravate the effects of the increases in anthropogenic emissions on future changes in the Asian O3 outflow. Future climate change is predicted to greatly increase the Asian O3 outflow in the spring and summer seasons as a result of the projected increases in zonal winds. The findings from the present study help us to understand the variations in tropospheric O3 in the downwind regions of East Asia on different timescales and have important implications for long-term air quality planning in the regions downwind of China, such as Japan and the US.

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“…Asian O 3 outflow exhibits seasonal variations (Liu et al, 2002;Han et al, 2015). Using a global 3-D chemical transport model GEOS-Chem, Liu et al (2002) simulated the seasonal variations of the Asian outflow flux of O 3 over the Pacific, which was defined as the eastward flux integrated for the tropospheric column through a wall located at 25 150° E between 10° N and 60° N. They found that the Asian O 3 outflow flux reached the maximum in early spring (March) and the minimum in summer (July).…”

Section: Introductionmentioning

confidence: 99%

“…Using a global 3-D chemical transport model GEOS-Chem, Liu et al (2002) simulated the seasonal variations of the Asian outflow flux of O 3 over the Pacific, which was defined as the eastward flux integrated for the tropospheric column through a wall located at 25 150° E between 10° N and 60° N. They found that the Asian O 3 outflow flux reached the maximum in early spring (March) and the minimum in summer (July). Han et al (2015) examined O 3 measurements at Ieodo Ocean Research Station, which was located in the East China Sea and regarded as an ideal place to observe Asian outflow without local effects. They reported that the seasonal variation of O 3 was distinct, with a minimum in August and two peaks in April and October, and was greatly affected by the seasonal wind pattern over East Asia.…”

Section: Introductionmentioning

confidence: 99%

Interannual variation, decadal trend, and future change in ozone outflow from East Asia

Zhu¹,

Liu²,

Mao³

et al. 2016

Preprint

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Abstract. We examine the past and future changes in O3 outflow from East Asia using a global three-dimensional chemical transport model GEOS-Chem. The simulations of Asian O3 outflow for 1986&#8211;2006 are driven by the assimilated GEOS-4 meteorological fields, and those for 2000&#8211;2050 are driven by the meteorological fields archived from the Goddard Institute for Space Studies (GISS) General Circulation Model (GCM) 3 under the IPCC SRES A1B scenario. Sensitivity studies are conducted to examine the respective impacts of meteorological parameters and emissions on the variations in the outflow flux of O3. When both meteorological parameters and anthropogenic emissions varied during 1986&#8211;2006, the simulated Asian O3 outflow fluxes exhibited a small and statistically insignificant decadal trend of &#8722;2.2&#8201;% decade&#8722;1, but large interannual variations (IAVs) with seasonal absolute percent departure from the mean (APDM) values of 4&#8211;9&#8201;% and annual APDM value of 3.3&#8201;%. Sensitivity simulations indicated that the large IAVs of O3 outflow fluxes were mainly caused by the variations in meteorological conditions. The simulations of the 2000&#8211;2050 changes show that the annual outflow flux of O3 will increase by 2.0&#8201;%, 7.9&#8201;%, and 12.2&#8201;%, respectively, owing to climate change alone, emissions change alone, and changes in both climate and emissions. Therefore, climate change will aggravate the effects of the increases in anthropogenic emissions on future changes in the Asian O3 outflow. Future climate change is predicted to greatly increase Asian O3 outflow in the spring and summer seasons as a result of the projected increases in zonal winds. Findings from the present study help to understand the variations in tropospheric O3 in the downwind regions of East Asia on different timescales, and have important implications for long-term air quality planning.

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

Abstract: Abstract. Ieodo Ocean Research Station (IORS), a research tower ( ∼ 40 m a.s

Cited by 12 publications

References 55 publications

Vertical distribution of particle-phase dicarboxylic acids, oxoacids and α-dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing

Vertical distribution of particle-phase dicarboxylic acids, oxoacids and α-dicarbonyls in the urban boundary layer based on the 325 m tower in Beijing

Interannual variation, decadal trend, and future change in ozone outflow from East Asia

Interannual variation, decadal trend, and future change in ozone outflow from East Asia

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