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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-11-3037-2011</article-id>
<title-group>
<article-title>Latitudinal distributions of organic nitrogen and organic carbon in marine aerosols over the western North Pacific</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Miyazaki</surname>
<given-names>Y.</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>Kawamura</surname>
<given-names>K.</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>Jung</surname>
<given-names>J.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Furutani</surname>
<given-names>H.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Uematsu</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Atmospheric and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan</addr-line>
</aff>
<pub-date pub-type="epub">
<day>01</day>
<month>04</month>
<year>2011</year>
</pub-date>
<volume>11</volume>
<issue>7</issue>
<fpage>3037</fpage>
<lpage>3049</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/11/3037/2011/acp-11-3037-2011.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/11/3037/2011/acp-11-3037-2011.pdf</self-uri>
<abstract>
<p>Marine aerosol samples were collected over the western North Pacific along
the latitudinal transect from 44° N to 10° N in late summer 2008 for
measurements of organic nitrogen (ON) and organic carbon (OC) as well as
isotopic ratios of total nitrogen (TN) and total carbon (TC). Increased
concentrations of methanesulfonic acid (MSA) and diethylammonium (DEA&lt;sup&gt;+&lt;/sup&gt;)
at 40–44° N and subtropical regions (10–20° N) together with
averaged satellite chlorophyll-&lt;i&gt;a&lt;/i&gt; data and 5-day back trajectories suggest a
significant influence of marine biological activities on aerosols in these
regions. ON exhibited increased concentrations up to 260 ngN m&lt;sup&gt;−3&lt;/sup&gt; in
these marine biologically influenced aerosols. Water-insoluble organic
nitrogen (WION) was found to be the most abundant nitrogen in the aerosols,
accounting for 55 &amp;plusmn; 16% of total aerosol nitrogen. In particular, the
average WION/ON ratio was as high as 0.93 &amp;plusmn; 0.07 at 40–44° N. These
results suggest that marine biological sources significantly contributed to
ON, a majority of which is composed of water-insoluble fractions in the
study region. Analysis of the stable carbon isotopic ratios (&amp;delta;&lt;sup&gt;13&lt;/sup&gt;C) indicated that, on average, marine-derived carbon accounted for
~88 &amp;plusmn; 12% of total carbon in the aerosols. In addition, the
&amp;delta;&lt;sup&gt;13&lt;/sup&gt;C showed higher values (from −22 to −20&amp;permil;) when ON/OC
ratios increased from 0.15 to 0.35 in marine biologically influenced
aerosols. These results clearly show that organic nitrogen is enriched in
organic aerosols originated from an oceanic region with high biological
productivity, indicating a preferential transfer of nitrogen-containing
organic compounds from the sea surface to the marine atmosphere. Both WION
concentrations and WION/water-insoluble organic carbon (WIOC) ratios tended
to increase with increasing local wind speeds, indicating that sea-to-air
emissions of ON via sea spray contribute significantly to the marine organic
aerosols over the study region.</p>
</abstract>
<counts><page-count count="13"/></counts>
</article-meta>
</front>
<body/>
<back>
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