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<article language="en">
	<journal>
		<journal_title>Atmospheric Chemistry and Physics Discussions</journal_title>
		<journal_url>www.atmos-chem-phys-discuss.net</journal_url>
		<issn>1680-7367</issn>
		<eissn>1680-7375</eissn>
		<volume_number>7</volume_number>
		<issue_number>6</issue_number>
		<publication_year>2007</publication_year>
	</journal>
	<doi>10.5194/acpd-7-17625-2007</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/7/17625/2007/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/7/17625/2007/acpd-7-17625-2007.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/7/17625/2007/acpd-7-17625-2007.pdf</fulltext_pdf>
	<start_page>17625</start_page>
	<end_page>17662</end_page>
	<publication_date>2007-12-05</publication_date>
	<article_title content_type="html">Inversion analysis of carbon monoxide emissions using data from the TES and MOPITT satellite instruments</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>D. B. A. Jones</name>
			<email>dbj@atmosp.physics.utoronto.ca</email>
		</author>
		<author numeration="2" affiliations="2">
			<name>K. W. Bowman</name>
		</author>
		<author numeration="3" affiliations="3">
			<name>J. A. Logan</name>
		</author>
		<author numeration="4" affiliations="4">
			<name>C. L. Heald</name>
		</author>
		<author numeration="5" affiliations="1">
			<name>J. Liu</name>
		</author>
		<author numeration="6" affiliations="2">
			<name>M. Luo</name>
		</author>
		<author numeration="7" affiliations="2">
			<name>J. Worden</name>
		</author>
		<author numeration="8" affiliations="1">
			<name>J. Drummond</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Department of Physics, University of Toronto, Toronto, Ontario, Canada</affiliation>
		<affiliation numeration="2" content_type="html">Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA</affiliation>
		<affiliation numeration="3" content_type="html">School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA</affiliation>
		<affiliation numeration="4" content_type="html">Center for Atmospheric Sciences, University of California, Berkeley, California, USA</affiliation>
	</affiliations>
	<abstract content_type="html">We conduct an inverse modeling analysis of measurements of atmospheric CO
from the TES and MOPITT satellite instruments using the GEOS-Chem global
chemical transport model. This is the first quantitative analysis of the
consistency of the information provided by these two instruments on surface
emissions of CO in an inverse modeling context. We focus on observations of
CO for November 2004, when the climatological emission inventory in the
GEOS-Chem model significantly underestimated the atmospheric abundance of CO
as observed by TES and MOPITT. We find that both datasets suggest
significantly greater emissions of CO from sub-equatorial Africa and the
Indonesian/Australian region. The a posteriori emissions from sub-equatorial
Africa based on TES and MOPITT data were 173 Tg CO/yr and 184 Tg CO/yr,
respectively, compared to the a priori of 95 Tg CO/yr. In the
Indonesian/Australian region, the a posteriori emissions inferred from TES
and MOPITT data were 155 Tg CO/yr and 185 Tg CO/yr, respectively, whereas
the a priori was 69 Tg CO/yr. The differences between the a posteriori
emission estimates obtained from the two datasets are generally less than
20%, and are likely due to the different spatio-temporal sampling of the
measurements. The a posteriori emissions significantly improve the simulated
distribution of CO, however, large regional residuals remain, reflecting
systematic errors in the analysis. For example, the a posteriori emissions
obtained from both datasets do not completely reduce the underestimate in
the model of CO column abundances over the southern tropical Atlantic,
southern Africa, and over the Indian Ocean, where biases of 3&amp;ndash;7% remain.
Over eastern Asia the a posteriori emissions overestimate the CO column
abundances by about 3&amp;ndash;6%. These residuals reflect the sensitivity of the
top-down source estimates to systematic errors in the analysis. Our results
indicate that improving the accuracy of top-down emission estimates will
require further characterization of model biases (chemical and transport)
and the use of spatial-temporal inversion resolutions consistent with the
information content of the observations.</abstract>
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	</references>
</article>

