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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>
<abbrev-journal-title abbrev-type="nlm-ta">Atmos. Chem. Phys.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</issn>
<publisher><publisher-name>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-13-10907-2013</article-id>
<title-group>
<article-title>A critical assessment of high-resolution aerosol optical depth retrievals for fine particulate matter predictions</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Chudnovsky</surname>
<given-names>A.</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>Tang</surname>
<given-names>C.</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>Lyapustin</surname>
<given-names>A.</given-names>
<ext-link>https://orcid.org/0000-0003-1105-5739</ext-link>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Wang</surname>
<given-names>Y.</given-names>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Schwartz</surname>
<given-names>J.</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>Koutrakis</surname>
<given-names>P.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Department of Geography and Human Environment, Tel Aviv University, Tel Aviv, Israel</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>NASA Goddard Space Flight Center, Greenbelt, MD, USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD 21228, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>07</day>
<month>11</month>
<year>2013</year>
</pub-date>
<volume>13</volume>
<issue>21</issue>
<fpage>10907</fpage>
<lpage>10917</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2013 A. Chudnovsky et al.</copyright-statement>
<copyright-year>2013</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://acp.copernicus.org/articles/13/10907/2013/acp-13-10907-2013.html">This article is available from https://acp.copernicus.org/articles/13/10907/2013/acp-13-10907-2013.html</self-uri>
<self-uri xlink:href="https://acp.copernicus.org/articles/13/10907/2013/acp-13-10907-2013.pdf">The full text article is available as a PDF file from https://acp.copernicus.org/articles/13/10907/2013/acp-13-10907-2013.pdf</self-uri>
<abstract>
<p>Recently, a new Multi-Angle Implementation of Atmospheric Correction (MAIAC)
algorithm was developed for the MODerate Resolution Imaging
Spectroradiometer (MODIS), which provides aerosol optical depth (AOD) at 1 km
resolution. The relationship between MAIAC AOD and PM&lt;sub&gt;2.5&lt;/sub&gt; as measured by
84 EPA ground monitoring stations in the entire New England and the Harvard
super site during 2002–2008 was investigated and also compared to the
AOD–PM&lt;sub&gt;2.5&lt;/sub&gt; relationship using conventional MODIS 10 km AOD retrieval
from Aqua platform (MYD04) for the same days and locations. The correlations
for MYD04 and for MAIAC are &lt;i&gt;r&lt;/i&gt; = 0.62 and 0.65, respectively, suggesting that
AOD is a reasonable proxy for PM&lt;sub&gt;2.5&lt;/sub&gt; ground concentrations. The slightly
higher correlation coefficient (&lt;i&gt;r&lt;/i&gt;) for MAIAC can be related to its finer
resolution resulting in better correspondence between AOD and EPA monitoring
sites. Regardless of resolution, AOD–PM&lt;sub&gt;2.5&lt;/sub&gt; relationship varies daily,
and under certain conditions it can be negative (due to several factors such
as an EPA site location (proximity to road) and the lack of information
about the aerosol vertical profile). By investigating MAIAC AOD data, we
found a substantial increase, by 50–70% in the number of collocated
AOD–PM&lt;sub&gt;2.5&lt;/sub&gt; pairs, as compared to MYD04, suggesting that MAIAC AOD data
are more capable in capturing spatial patterns of PM&lt;sub&gt;2.5&lt;/sub&gt;. Importantly,
the performance of MAIAC AOD retrievals is slightly degraded but remains
reliable under partly cloudy conditions when MYD04 data are not available,
and it can be used to increase significantly the number of days for
PM&lt;sub&gt;2.5&lt;/sub&gt; spatial pattern prediction based on satellite observations.</p>
</abstract>
<counts><page-count count="11"/></counts>
</article-meta>
</front>
<body/>
<back>
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