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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>9</volume_number>
		<issue_number>5</issue_number>
		<publication_year>2009</publication_year>
	</journal>
	<doi>10.5194/acpd-9-19599-2009</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/9/19599/2009/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/9/19599/2009/acpd-9-19599-2009.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/9/19599/2009/acpd-9-19599-2009.pdf</fulltext_pdf>
	<start_page>19599</start_page>
	<end_page>19640</end_page>
	<publication_date>2009-09-22</publication_date>
	<article_title content_type="html">Estimates of biomass burning emissions in tropical Asia based on satellite-derived data</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>D. Chang</name>
		</author>
		<author numeration="2" affiliations="1">
			<name>Y. Song</name>
			<email>songyu@pku.edu.cn</email>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Department of Environmental Sciences, Peking University, Beijing 100871, China</affiliation>
	</affiliations>
	<abstract content_type="html">Biomass burning in tropical Asia emits large amounts of trace gases and particulate matters
      into the atmosphere, which has significant implications for atmospheric chemistry and
      climatic change. In this study, emissions from open biomass burning over tropical Asia were
      evaluated during seven fire years from 2000–2006 (1 April 2000–31 March 2007). Burned
      areas were estimated from newly published 1-km L3JRC and 500-m MODIS burned area products
      (MCD45A1). Available fuel loads and emission factors were assigned for each vegetation type
      in a GlobCover characterisation map, and fuel moisture content was taken into account when
      calculating combustion factors. Over the whole period, both burned areas and fire emissions
      clearly showed spatial and seasonal variations. The L3JRC burned areas ranged from
      31 165 km&lt;sup&gt;2&lt;/sup&gt; in fire year 2005 to 57 313 km&lt;sup&gt;2&lt;/sup&gt; in 2000, while the
      MCD45A1 burned areas ranged from 54 260 km&lt;sup&gt;2&lt;/sup&gt; in fire year 2001 to
      127 068 km&lt;sup&gt;2&lt;/sup&gt; in 2004. Comparisons of L3JRC and MCD45A1 burned areas with
      ground-based measurements and other satellite information were constructed in several major
      burning regions, and results suggested that MCD45A1 performed better in most areas than
      L3JRC did although with a certain degree of underestimation of burned forest areas. The
      average annual L3JRC-based emissions were 125, 12, 0.98, 1.91, 0.11, 0.89, 0.044, 0.022,
      0.42, 3.40, and 3.68 Tg yr&lt;sup&amp;minus;1&lt;/sup&gt; for CO&lt;sub&gt;2&lt;/sub&gt;, CO, CH&lt;sub&gt;4&lt;/sub&gt;,
      NMHC&lt;sub&gt;s&lt;/sub&gt;, NO&lt;sub&gt;x&lt;/sub&gt;, NH&lt;sub&gt;3&lt;/sub&gt;, SO&lt;sub&gt;2&lt;/sub&gt;, BC, OC, PM&lt;sub&gt;2.5&lt;/sub&gt;,
      and PM&lt;sub&gt;10&lt;/sub&gt;, respectively, while MCD45A1-based emissions were 130, 9.79, 0.65, 1.14,
      0.12, 0.56, 0.046, 0.036, 0.42, 3.21, and 3.49 Tg yr&lt;sup&gt;&amp;minus;1&lt;/sup&gt;. Forest burning was
      determined as the major source of the fire emissions due to the high carbon
      density. Although agricultural burning was the second important contributor, a great deal of
      crop residue combustion could probably be missed by satellite observations when compared to
      previously published data, which may be because of its small burning size. Fire emissions
      were mainly concentrated in Indonesia, India, Myanmar, and Cambodia. Furthermore, the peak
      in burned area was generally found in the early fire season, while the maximum fire
      emissions often occurred in the late fire season.</abstract>
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