Pub Date : 2017-08-04DOI: 10.1007/s10874-017-9367-7
K. J. Wall, G. W. Harris
{"title":"Erratum to: Uptake of nitrogen dioxide (NO2) on acidic aqueous humic acid (HA) solutions as a missing daytime nitrous acid (HONO) surface source","authors":"K. J. Wall, G. W. Harris","doi":"10.1007/s10874-017-9367-7","DOIUrl":"https://doi.org/10.1007/s10874-017-9367-7","url":null,"abstract":"","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2017-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-017-9367-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4149360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-04DOI: 10.1007/s10874-017-9368-6
Koichi Watanabe, Chinatsu Yachi, Xiao Jing Song, Saori Kakuyama, Miyuki Nishibe, Sheng Jun Jin
Measurements of the concentrations of H2O2 and methyl hydroperoxide (MHP), O3, and SO2 over Imizu City, Toyama Prefecture, Japan were performed in March using a helicopter. H2O2 concentrations were higher at an altitude of approximately 2,400 m (8,000 ft). The H2O2 concentrations (< 0.8 ppb) in the spring were much lower than those observed during the summer observations. MHP was also higher in the high-altitude atmosphere. Lower concentrations of H2O2 were observed when high air pollutants were actively transported from Asian continent. The concentrations of H2O2 were mostly lower than those of SO2; this condition is called oxidant limitation. If H2O2 concentration rises in cold months, the acidification of cloud water may be accelerated at high elevations in central Japan where air pollution is actively transported.
{"title":"Atmospheric hydroperoxides measured over a rural site in central Japan during spring: helicopter-borne measurements","authors":"Koichi Watanabe, Chinatsu Yachi, Xiao Jing Song, Saori Kakuyama, Miyuki Nishibe, Sheng Jun Jin","doi":"10.1007/s10874-017-9368-6","DOIUrl":"https://doi.org/10.1007/s10874-017-9368-6","url":null,"abstract":"<p>Measurements of the concentrations of H<sub>2</sub>O<sub>2</sub> and methyl hydroperoxide (MHP), O<sub>3</sub>, and SO<sub>2</sub> over Imizu City, Toyama Prefecture, Japan were performed in March using a helicopter. H<sub>2</sub>O<sub>2</sub> concentrations were higher at an altitude of approximately 2,400 m (8,000 ft). The H<sub>2</sub>O<sub>2</sub> concentrations (< 0.8 ppb) in the spring were much lower than those observed during the summer observations. MHP was also higher in the high-altitude atmosphere. Lower concentrations of H<sub>2</sub>O<sub>2</sub> were observed when high air pollutants were actively transported from Asian continent. The concentrations of H<sub>2</sub>O<sub>2</sub> were mostly lower than those of SO<sub>2</sub>; this condition is called <i>oxidant limitation</i>. If H<sub>2</sub>O<sub>2</sub> concentration rises in cold months, the acidification of cloud water may be accelerated at high elevations in central Japan where air pollution is actively transported.</p>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2017-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-017-9368-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4151704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-07DOI: 10.1007/s10874-017-9366-8
Kojiro Shimada, Xiaoyang Yang, Yushi Araki, Ayako Yoshino, Akinori Takami, Xuan Chen, Fan Meng, Shiro Hatakeyama
To determine the effects of long-range transport of aerosols from an upwind area in East Asia to a downwind area in Japan, we chemically analyzed aerosols collected simultaneously on Tuoji Island (Shandong Province, China), Fukue Island (Nagasaki Prefecture, Japan), and Cape Hedo (Okinawa Prefecture, Japan). We focused on changes in the metallic composition of PM2.5 aerosols during long-range transport. The average mass concentrations of PM2.5 at the three sites decreased in the order Tuoji Island > Fukue Island ≈ Cape Hedo (48.3 ± 4.5, 13.9 ± 1.5, and 13.2 ± 0.9 μg/m3, respectively). The fraction of coarse particles in total suspended particles estimated by (1–PM2.5/TSP) was highest on Cape Hedo, indicating that the contribution of sea salts was increased by long-range transport of the aerosols over the ocean. Enrichment factor analysis revealed that at all three sites, Al, K, Ca, Mn, Fe, Co, Sr, and Ba originated from soil; whereas Cr, Ni, Cu, Zn, As, Mo, Ag, Cd, Sn, Sb, Tl, and P appeared to be of anthropogenic origin. Na was the most abundant element on Cape Hedo, indicating the addition of sea salts during aerosol transport. The V concentration was highest at Fukue Island, which was ascribed to V emission from ships. Sixty-one percent of the V on Fukue Island and 62% of the V on Cape Hedo were determined to have originated from ships, implicating of data obtained on dates during which backward trajectory analysis indicated that the same air mass passed over Tuoji Island, Fukue Island, and Cape Hedo in that order.
{"title":"Concentrations of metallic elements in long-range-transported aerosols measured simultaneously at three coastal sites in China and Japan","authors":"Kojiro Shimada, Xiaoyang Yang, Yushi Araki, Ayako Yoshino, Akinori Takami, Xuan Chen, Fan Meng, Shiro Hatakeyama","doi":"10.1007/s10874-017-9366-8","DOIUrl":"https://doi.org/10.1007/s10874-017-9366-8","url":null,"abstract":"<p>To determine the effects of long-range transport of aerosols from an upwind area in East Asia to a downwind area in Japan, we chemically analyzed aerosols collected simultaneously on Tuoji Island (Shandong Province, China), Fukue Island (Nagasaki Prefecture, Japan), and Cape Hedo (Okinawa Prefecture, Japan). We focused on changes in the metallic composition of PM<sub>2.5</sub> aerosols during long-range transport. The average mass concentrations of PM<sub>2.5</sub> at the three sites decreased in the order Tuoji Island > Fukue Island ≈ Cape Hedo (48.3 ± 4.5, 13.9 ± 1.5, and 13.2 ± 0.9 μg/m<sup>3</sup>, respectively). The fraction of coarse particles in total suspended particles estimated by (1–PM<sub>2.5</sub>/TSP) was highest on Cape Hedo, indicating that the contribution of sea salts was increased by long-range transport of the aerosols over the ocean. Enrichment factor analysis revealed that at all three sites, Al, K, Ca, Mn, Fe, Co, Sr, and Ba originated from soil; whereas Cr, Ni, Cu, Zn, As, Mo, Ag, Cd, Sn, Sb, Tl, and P appeared to be of anthropogenic origin. Na was the most abundant element on Cape Hedo, indicating the addition of sea salts during aerosol transport. The V concentration was highest at Fukue Island, which was ascribed to V emission from ships. Sixty-one percent of the V on Fukue Island and 62% of the V on Cape Hedo were determined to have originated from ships, implicating of data obtained on dates during which backward trajectory analysis indicated that the same air mass passed over Tuoji Island, Fukue Island, and Cape Hedo in that order.</p>","PeriodicalId":611,"journal":{"name":"Journal of Atmospheric Chemistry","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2017-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s10874-017-9366-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4306959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-05-10DOI: 10.1007/s10874-017-9365-9
Laura Tositti, Linda Pieri, Erika Brattich, Silvia Parmeggiani, Francesca Ventura
This study provides an analysis of a five-year time series chemical composition of the bulk deposition (2009–2013), collected within a farm surrounded by industrial and urban settlements in a semi-rural area of the Po Valley, with the aim of characterizing potential emission sources affecting precipitation composition at the site. Most monitoring efforts in this region, recognized as one of the most polluted in the world both due to the intense industrialisation and urbanisation as well as to frequent air stagnation conditions, are presently devoted more to gaseous and particulate pollutants than to precipitation chemistry. The bulk deposition samples were very concentrated in chemical species, both acidic and alkaline, high compared to other polluted sites in the world and to locations in the same district. The mean ions concentrations (in μeq l?1) are: NO3