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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ACP</journal-id>
<journal-title-group>
<journal-title>Atmospheric Chemistry and Physics</journal-title>
<abbrev-journal-title abbrev-type="publisher">ACP</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</issn>
<publisher><publisher-name>Copernicus GmbH</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-10-5839-2010</article-id>
<title-group>
<article-title>Size distributions of dicarboxylic acids, ketoacids, α-dicarbonyls, sugars, WSOC, OC, EC and inorganic ions in atmospheric particles over Northern Japan: implication for long-range transport of Siberian biomass burning and East Asian polluted aerosols</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Agarwal</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Aggarwal</surname>
<given-names>S. G.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Okuzawa</surname>
<given-names>K.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Kawamura</surname>
<given-names>K.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Institute of Low Temperature Science, Hokkaido University, Kita 19, Nishi 8, Sapporo – 0600819, Japan</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>National Physical Laboratory (Council of Scientific and Industrial Research), Dr. K.S. Krishnan Road, New Delhi – 110012, India</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>now at: Japan Isotope Analysis Laboratory, Inc., 75-1 Onocho, Tsurumi-ku, Yokohama-city, Kanagawa 230-0046, Japan</addr-line>
</aff>
<pub-date pub-type="epub">
<day>02</day>
<month>07</month>
<year>2010</year>
</pub-date>
<volume>10</volume>
<issue>13</issue>
<fpage>5839</fpage>
<lpage>5858</lpage>
<permissions>
<license xlink:type="simple">
<license-p>This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p>
</license>
</permissions>
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<self-uri xlink:href="http://www.atmos-chem-phys.net/10/5839/2010/acp-10-5839-2010.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/5839/2010/acp-10-5839-2010.pdf</self-uri>
<abstract>
<p>To better understand the size-segregated chemical composition of aged
organic aerosols in the western North Pacific rim, day- and night-time
aerosol samples were collected in Sapporo, Japan during summer 2005 using an
Andersen impactor sampler with 5 size bins: &lt;I&gt;D&lt;sub&gt;p&lt;/sub&gt;&lt;/I&gt;&amp;lt;1.1, 1.1–2.0, 2.0–3.3,
3.3–7.0, &gt;7.0 μm. Samples were analyzed for the molecular composition
of dicarboxylic acids, ketoacids, α-dicarbonyls, and sugars,
together with water-soluble organic carbon (WSOC), organic carbon (OC),
elemental carbon (EC) and inorganic ions. Based on the analyses of backward
trajectories and chemical tracers, we found that during the campaign, air
masses arrived from Siberia (a biomass burning source region) on 8–9 August,
from China (an anthropogenic source region) on 9–10 August, and from the
East China Sea/Sea of Japan (a mixed source receptor region) on 10–11
August. Most of the diacids, ketoacids, dicarbonyls, levoglucosan, WSOC, and
inorganic ions (i.e., SO&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;2&amp;minus;&lt;/sup&gt;, NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; and K&lt;sup&gt;+&lt;/sup&gt;) were
enriched in fine particles (PM&lt;sub&gt;1.1&lt;/sub&gt;) whereas Ca&lt;sup&gt;2+&lt;/sup&gt;, Mg&lt;sup&gt;2+&lt;/sup&gt; and
Cl&lt;sup&gt;&amp;minus;&lt;/sup&gt; peaked in coarse sizes (&gt;1.1 μm). Interestingly, OC, most
sugar compounds and NO&lt;sub&gt;3&lt;/sub&gt;&lt;sup&gt;&amp;minus;&lt;/sup&gt; showed bimodal distributions in fine
and coarse modes. In PM&lt;sub&gt;1.1&lt;/sub&gt;, diacids in biomass burning-influenced
aerosols transported from Siberia (mean: 252 ng m&lt;sup&gt;−3&lt;/sup&gt;) were more abundant
than those in the aerosols originating from China (209 ng m&lt;sup&gt;−3&lt;/sup&gt;) and
ocean (142 ng m&lt;sup&gt;−3&lt;/sup&gt;), whereas SO&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;2&amp;minus;&lt;/sup&gt; concentrations were highest
in the aerosols from China (mean: 3970 ng m&lt;sup&gt;−3&lt;/sup&gt;) followed by marine-
(2950 ng m&lt;sup&gt;−3&lt;/sup&gt;) and biomass burning-influenced (1980 ng m&lt;sup&gt;−3&lt;/sup&gt;)
aerosols. Higher loadings of WSOC (2430 ng m&lt;sup&gt;−3&lt;/sup&gt;) and OC (4360 ng m&lt;sup&gt;−3&lt;/sup&gt;)
were found in the fine mode, where biomass-burning products such
as levoglucosan are abundant. This paper presents a case study of long-range
transported aerosols illustrating that biomass burning episodes in the
Siberian region have a significant influence on the chemical composition of
carbonaceous aerosols in the western North Pacific rim.</p>
</abstract>
<counts><page-count count="20"/></counts>
</article-meta>
</front>
<body/>
<back>
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