Contributions of Long-Range Transported and Locally Emitted Nitrate in Size-Segregated Aerosols in Japan at Kyushu and Okinawa

Tatsuta, Shiori; Shimada, Kojiro; Chan, Chak K.; Kim, Yong Pyo; Lin, Neng Huei; Takami, Akinori; Hatakeyama, Shiro

doi:10.4209/aaqr.2016.12.0587

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…The eluent was 1.8 mol L -1 Na 2 CO 3 /1.7 mmol L -1 NaHCO 3 for anions, and 18 mmol L -1 methanesulfonic acid for cations. The concentration of each ionic component (detection limit for each ion of 0.01 µg m -3 ) and element was calculated by subtracting the blank value (Yumoto et al, 2015;Taniguchi et al, 2017;Tatsuta et al, 2017;Shimada et al, 2017). The SO 4 2concentrations obtained from the 15 field campaigns are summarized in Fig.…”

Section: Observationsmentioning

confidence: 99%

Sources of High Sulfate Aerosol Concentration Observed at Cape Hedo in Spring 2012

Itahashi

Hatakeyama

Shimada

et al. 2019

Aerosol Air Qual. Res.

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Intensive observation campaigns approximately 1 week long were conducted periodically from March 2010 to November 2015 at Cape Hedo, Okinawa, Japan. The maximum daily mean sulfate aerosol (SO 4 2-) concentrations surpassed 15 µg m -3 in spring 2012. In this study, source apportionment for these high concentrations was conducted using an air quality model with the tagged tracer method, and the main source was identified as volcanoes in March and as anthropogenic emissions from China in April. In March, the prevailing northerly wind transported a volcanic SO 2 plume with a low conversion ratio to Cape Hedo. The impacts of 15 volcanoes in Japan were estimated, and a substantial impact from Sakurajima, which accounted for more SO 2 than anthropogenic emissions from Japan, was found. Because the model had difficulty capturing the highest concentration, three sensitivity simulations were performed to consider the uncertainty of the volcanic SO 2 emission amounts and injection heights, revealing the importance of the injection height in addition to the SO 2 emission amount. Throughout April, contributions from anthropogenic emissions from China were found; hence, this source was further divided into 31 provincial scales. Shandong and Jiangsu Provinces, which are the first and seventh largest emission sources in China, respectively, were identified as significant sources at Cape Hedo. These sources showed day-to-day variation in their contributions, and the highest contribution from Shandong Province occurred on April 23, whereas that from Jiangsu Province occurred on April 22.

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Section: Observationsmentioning

confidence: 99%

Sources of High Sulfate Aerosol Concentration Observed at Cape Hedo in Spring 2012

Itahashi

Hatakeyama

Shimada

et al. 2019

Aerosol Air Qual. Res.

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“…The ions in the aerosols were analyzed by ion chromatography and metals were analyzed by inductively coupled plasma-mass spectrometry. The observation details of ions and metals conducted on CHAAMS are reported in the companion articles (Tatsuta et al, 2017;Taniguchi et al, 2017).…”

Section: Observationsmentioning

confidence: 99%

“…The location of CHAAMS is suitable for capturing the atmospheric pollutants via LRT, and has already revealed the behavior of aerosols affected by the LRT Takiguchi et al, 2008;Hatakeyama et al, 2011;Shimada et al, 2015). During the intensive observation ), which is mainly produced by the oxidation of sulfur dioxide (SO 2 ), was the dominant aerosol component at CHAAMS (Tatsuta et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Model Estimation of Sulfate Aerosol Sources Collected at Cape Hedo during an Intensive Campaign in October-November, 2015

Itahashi

Hatakeyama

Shimada

et al. 2017

Aerosol Air Qual. Res.

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An intensive observation campaign at Cape Hedo, Okinawa, Japan was conducted from late October to early November 2015 to investigate the behavior of long-range transported atmospheric pollutants. During this period, sulfate (SO 4 2-) was the dominant aerosol component. The sources of SO 4 2-were estimated by using the air quality model with the tagged tracer method. The main source of high SO 4 2-concentration varied day-to-day. When the westerly wind was dominant (October 27), the main source was anthropogenic SO 2 emissions in China. When the northerly wind prevailed (November 1), the impact of volcanoes in western Japan was significant and the conversion ratio from SO 2 to SO 4 2-was lowest, at less than 70%, because of the faster transport. During the latter part of the campaign, the northerly to easterly winds were prominent, and the impacts of Korea, Japan, and ships on SO 4 2-observed at Cape Hedo were also clear. When the contributions from Korea, Japan, and ships were the highest (November 4), the conversion ratio was also the highest, at greater than 95% because of long-range transport. The modeled sources of volcanoes and ship emissions corresponded well with the observed coarse-mode SO 4 2-and V/Mn ratio, respectively. The mutual evaluation of sources from model and observations enable SO 4 2-sources to be estimated with higher confidence.

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“…The atmospheric diffusion capability is crucial in the regional transport of aerosols and greatly depends on meteorological conditions. Numerical simulations and the HYSPLIT trajectory method have been used extensively in pollution analysis and research [14][15][16][17][18][19]. Stein et al [20] detailed the historical evolution and recent improvements in HYSPLIT.…”

Section: Introductionmentioning

confidence: 99%

Air Quality in Ningbo and Transport Trajectory Characteristics of Primary Pollutants in Autumn and Winter

Yao

et al. 2019

Atmosphere

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By using meteorology and pollution observation data from Zhejiang province, and data from the National Centers for Environmental Prediction’s Global Data Assimilation System from 1 June 2013, to 31 May 2016, we analyzed air quality characteristics in Ningbo and applied the HYSPLIT model to do backward trajectory clustering statistics for pollution cases of moderate, heavy and severe (henceforth referred to as moderate-and-above) levels. The results indicated that the percentage of moderate-and-above pollution was approximately 6%, which mostly occurred from November to February, with the primary pollutant being particulate matter with a diameter of ≤2.5 μm; Moderate-and-above pollution was mainly caused by pollutants from three types of trajectories (type mx, type 1, and type 2), with type 2 differing significantly from types 1 and mx. Type 2 occurred in stable boundary layers, whereas types mx and 1 occurred in unstable and conditionally unstable layers respectively. These three trajectory types were all related to cold air, but type 2 was weaker than the other two. Analysis of typical cases of various pollution types revealed that a heavy pollution outbreak was due to continuous superposition of pollutants. The input particles most likely originated from the northwest. The upstream situation was the focus of investigation to assist in local pollution forecasting.

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Contributions of Long-Range Transported and Locally Emitted Nitrate in Size-Segregated Aerosols in Japan at Kyushu and Okinawa

Cited by 12 publications

References 19 publications

Sources of High Sulfate Aerosol Concentration Observed at Cape Hedo in Spring 2012

Sources of High Sulfate Aerosol Concentration Observed at Cape Hedo in Spring 2012

Model Estimation of Sulfate Aerosol Sources Collected at Cape Hedo during an Intensive Campaign in October-November, 2015

Air Quality in Ningbo and Transport Trajectory Characteristics of Primary Pollutants in Autumn and Winter

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