<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "http://dtd.nlm.nih.gov/publishing/3.0/journalpublishing3.dtd">
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" article-type="research-article" dtd-version="3.0" xml:lang="en">
<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-10-9943-2010</article-id>
<title-group>
<article-title>Interannual variability in soil nitric oxide emissions over the United States as viewed from space</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hudman</surname>
<given-names>R. 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>Russell</surname>
<given-names>A. R.</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>Valin</surname>
<given-names>L. 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>Cohen</surname>
<given-names>R. C.</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 Chemistry, University of California Berkeley, Berkeley, CA, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>20</day>
<month>10</month>
<year>2010</year>
</pub-date>
<volume>10</volume>
<issue>20</issue>
<fpage>9943</fpage>
<lpage>9952</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>
<self-uri xlink:href="http://www.atmos-chem-phys.net/10/9943/2010/acp-10-9943-2010.html">This article is available from http://www.atmos-chem-phys.net/10/9943/2010/acp-10-9943-2010.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/10/9943/2010/acp-10-9943-2010.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/9943/2010/acp-10-9943-2010.pdf</self-uri>
<abstract>
<p>We examine the interannual variability in the NO&lt;sub&gt;2&lt;/sub&gt; column over North
America measured by the Ozone Monitoring Instrument (OMI) in 2005–2008. By
comparison to a model of soil NO&lt;sub&gt;x&lt;/sub&gt; emissions driven by the North
American Regional Reanalysis precipitation and 0–10 cm soil temperature
fields, we show the source of this observed interannual variability over
much of the central United States in June is fertilizer application. We find
that dry, warm conditions followed by convective precipitation induces pulsed
emissions of NO&lt;sub&gt;x&lt;/sub&gt; over the agricultural Great Plains. In June 2006 we
infer a 50% increase in soil NO&lt;sub&gt;x&lt;/sub&gt; emission and a 30% increase in
the tropospheric NO&lt;sub&gt;2&lt;/sub&gt; column relative to the June 2005–2008 mean. In a
case-study of fertilized corn and soybean fields over SE South Dakota, we
find an associated rain-induced pulsing event reaching
4.6&amp;times;10&lt;sup&gt;15&lt;/sup&gt; molec cm&lt;sup&gt;&amp;minus;2&lt;/sup&gt;, equivalent to a surface concentration of ~2 ppbv. We
calculate that soil NO&lt;sub&gt;x&lt;/sub&gt; emissions resulted in a mean daily maximum 8-h
ozone enhancement over the agricultural Great Plains of 5 ppbv in June 2006
(with predicted events reaching 16 ppbv) compared with a mean enhancement of
3 ppbv for soil NO&lt;sub&gt;x&lt;/sub&gt; in the years 2005–2008.</p>
</abstract>
<counts><page-count count="10"/></counts>
</article-meta>
</front>
<body/>
<back>
<ref-list>
<title>References</title>
<ref id="ref1">
<label>1</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Anderson, I. C. and Levine, J. S.: Simultaneous field measurements of biogenic emissions of nitric oxide and nitrous oxide, J. Geophys. Res., 92, 965–976, 1987. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Bertram, T. H., Heckel, A., Richter, A., Burrows, J. P., and Cohen, R. C.: Satellite measurements of daily variations in soil NO&lt;sub&gt;x&lt;/sub&gt; emissions, Geophys. Res. Lett., 32, L24812, doi:10.1029/2005GL024640, 2005. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Bey, I., Jacob, D. J., Yantosca, R. M., Logan, J. A., Field, B. D., Fiore, A. M., Li, Q., Liu, H. Y., Mickley, L. J., and Schultz, M. G.: Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation, J. Geophys. Res., 106, 23073–23095, 2001. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Boersma, K. F., Bucsela, E. J., Brinksma, E. J., and Gleason, J. F.: NO&lt;sub&gt;2&lt;/sub&gt;, in: OMI Algorithm Theoretical Basis Document, Vol. 4, OMI Trace Gas Algorithms, ATBD-OMI-04 (Version 2), 13–36, 2002. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Boersma, K. F., Eskes, H. J., Veefkind, J. P., Brinksma, E. J., van der A, R. J., Sneep, M., van den Oord, G. H. J., Levelt, P. F., Stammes, P., Gleason, J. F., and Bucsela, E. J.: Near-real time retrieval of tropospheric NO&lt;sub&gt;2&lt;/sub&gt; from OMI, Atmos. Chem. Phys., 7, 2103–2118, doi:10.5194/acp-7-2103-2007, 2007. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Boersma, K. F., Jacob, D. J. , Bucsela, E. J., Perring, A. E, Dirksen, R., van der A, R. J., Yantosca, R. M., Park, R. J., Wenig, M. O., Bertram, T. H., and Cohen, R. C.: Validation of OMI tropospheric NO&lt;sub&gt;2&lt;/sub&gt; observations during INTEX-B and application to constrain NO&lt;sub&gt;x&lt;/sub&gt; emissions over the eastern United States and Mexico, Atmos. Environ., 42, 4480–4497, 2008. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Bucsela, E. J., Celarier, E. A., Wenig, M. O., Gleason, J. F., Veefkind, J. P., Boersma, K. F., and Brinksma, E. J.: Algorithm for NO&lt;sub&gt;2&lt;/sub&gt; vertical column retrieval from the ozone monitoring instrument, IEEE Trans. Geosci. Remote Sens., 44(5), 1245–1258, 2006. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Celarier, E. A., Brinksma, E. J., Gleason, J. F., Veefkind, J. P., Cede, A., Herman, J. R., Ionov, D., Goutail, F., Pommereau, J. P., Lambert, J. C., van Roozendael, M., Pinardi, G., Wittrock, F., Schonhardt, A., Richter, A., Ibrahim, O. W., Wagner, T., Bojkov, B., Mount, G., Spinei, E., Chen, C. M., Pongetti, T. J., Sander, S. P., Bucsela, E. J., Wenig, M. O., Swart, D. P. J., Volten, H., Kroon, M., and Levelt, P. F.: Validation of ozone monitoring instrument nitrogen dioxide columns, J. Geophys. Res., 113, D15S15, doi:10.1029/2007JD008908, 2008. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Conrad, R.: Soil microorganisms as controllers of atmospheric trace gases (H&lt;sub&gt;2&lt;/sub&gt;, CO, CH&lt;sub&gt;4&lt;/sub&gt;, OCS, N&lt;sub&gt;2&lt;/sub&gt;O, and NO), Microbiol. Rev., 60, 609–640, 1996. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Davidson, E. A. and Kingerlee, W.: A global inventory of nitric oxide emissions from soils, Nutr. Cycl. Agroecosys., 48, 37–50, 1997. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Delon C., Serca, D., Boissard, C., Dupont, R., Dutot, A., Laville, P., de Rosnay, P., and Delmas, R.: Soil NO emissions modeling using artificial neural network, Tellus B, 59B, 502–513, 2007. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Emmons, L. K., Walters, S., Hess, P. G., Lamarque, J.-F., Pfister, G. G., Fillmore, D., Granier, C., Guenther, A., Kinnison, D., Laepple, T., Orlando, J., Tie, X., Tyndall, G., Wiedinmyer, C., Baughcum, S. L., and Kloster, S.: Description and evaluation of the Model for Ozone and Related chemical Tracers, version 4 (MOZART-4), Geosci. Model Dev., 3, 43–67, 2010. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Frost, G. J., McKeen, S. A., Trainer, M., et al.: Effects of changing power plant NO&lt;sub&gt;x&lt;/sub&gt; emissions on ozone in the eastern United States: Proof of concept, J. Geophys. Res., 111, D12306, doi:10.1029/2005JD006354, 2006. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Goebes, M. D., Strader, R., and Davidson, C.: An ammonia emission inventory for fertilizer application in the United States, Atmos. Environ., 37, 2539–2550, 2003. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Hudman, R. C., Jacob, D. J., Turquety, S., Leibensperger, E. M., Murray, L. T., Wu, S., Gilliland, A. B., Avery, M., Bertram, T. H., Brune, W., Cohen, R. C., Dibb, J. E., Flocke, F. M., Fried, A., Holloway, J., Neuman, J. A., Orville, R., Perring, A., Ren, X., Sachse, G. W., Singh, H. B., Swanson, A., and Wooldridge, P. J.: Surface and lightning sources of nitrogen oxides over the United States: Magnitudes, chemical evolution, and outflow, J. Geophys. Res., 112, D12S05, doi:10.1029/2006JD007912, 2007. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Hudman, R. C., Murray, L. T., Jacob, D. J., Millet, D. B., Turquety, S., Wu, S., Blake, D. R., Goldstein, A. H., Holloway, J., and Sachse, G. W.: Biogenic versus anthropogenic sources of CO in the United States, Geophys. Res. Lett., 35, L04801, doi:10.1029/2007GL032393, 2008. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Hutchinson, G. L. and Brams, E. A.: NO versus N&lt;sub&gt;2&lt;/sub&gt;O emissions from an NH$_4^+$ -amended Bermuda grass pasture, J. Geophys. Res., 97, 9889–9896, 1992. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Intergovernmental Panel on Climate Change: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., and Manning, M. et al., Cambridge Univ. Press, Cambridge, UK, 2007. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Jaegle, L., Steinberger, L., Martin, R. V., and Chance, K.: Global partitioning of NO&lt;sub&gt;x&lt;/sub&gt; sources using satellite observations: Relative roles of fossil fuel combustion, biomass burning and soil emissions, Faraday Discuss., 130, 407–423, 2005. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Kuhns, H., Knipping, E. M., and Vukovich, J. M.: Development of a United States-Mexico Emissions Inventory for the Big Bend Regional Aerosol and Visibility Observational (BRAVO) Study, JAPCA J. Air Waste M., 55, 677–692, 2005. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Krupa, S., Bowersox, V., Lehmann, C., and Grantz, D.: Uncertainties in the Current Knowledge of Some Atmospheric Trace Gases Associated with U.S. Agriculture, JAPCA J. Air Waste M., 58, 986–993, 2008. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Lamsal, L. N., Martin, R. V., van Donkelaar, A., Celarier, V., Bucsela, E. J., Boersma, K. F., Dirksen, R., Luo, C., and Wang, Y.: Indirect validation of tropospheric nitrogen dioxide retrieved from the OMI satellite instrument: Insight into the seasonal variation of nitrogen oxides at northern midlatitudes, J. Geophys. Res., 115, D05302, doi:10.1029/2009JD013351, 2010. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Ludwig, J., Franz, F. X. , Vogel, B., and Forstner, J. : Soil-air exchange of nitric oxide: An overview of processes, environmental factors, and modelling studies, Biogeochemistry, 52, 225–257, 2001. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Martin, R. E., Scholes, M. C., Nosier, A. R., Ojima, D. S., Holland, E. A., and Parton, W. J.: Controls on annual emissions of nitric oxide from soils of the Colorado shortgrass steppe, Global Biogeochem. Cy., 12, 81–91, 1998. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Martin, R. V., Jacob, D. J., Chance, K., Kurosu, T. P., Palmer, P. I., and Evans, M. J.: Global inventory of nitrogen oxide emissions constrained by space-based observations of NO&lt;sub&gt;2&lt;/sub&gt; columns, J. Geophys. Res., 108(D17), 4537, doi:10.1029/2003JD003453, 2003. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Matson, P. A., Naylor, R. L., and Ortiz Monasterio, I.: Integration of environmental, agronomic, and economic aspects of fertilizer management, Science, 280, 112–115, 1998. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Meixner, F. X. and Yang, W. X.: Biogenic emissions of nitric oxide and nitrous oxide from arid and semi-arid land, in: Dryland Ecohydrology, edited by: D&apos;Odorico, P. and Porporato, A., Dordrecht, Berlin Heidelberg New York, ISBN: 1-4020-4261-2, 233–255, 2006. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Mesinger, F., DiMego, G., Kalnay, E., et al.: North American Regional Reanalysis, B. Am. Meteorol. Soc., 87, 343–360, 2006. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Mijling, B., van der A, R. J., Boersma, K. F., Van Roozendael, M., De Smedt, I., and Kelder, H. M.: Reductions of NO&lt;sub&gt;2&lt;/sub&gt; detected from space during the 2008 Beijing Olympic Games, Geophys. Res. Lett., 36, L13801, doi:10.1029/2009GL038943, 2009. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Millet, D. B., Jacob, D. J., Turquety, S., Hudman, R. C., Wu, S., Fried, A., Walega, J., Heikes, B. G., Blake, D. R., Singh, H. B., Anderson, B. E., and Clarke, A. D.: Formaldehyde distribution over North America: implications for satellite retrievals of formaldehyde columns and isoprene emission, J. Geophys. Res., 111, D24S02, doi:10.1029/2005JD006853, 2006. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Murray, L. T.: Spatiotemporally constraining the lightning flash rate parameterization to satellite observations in a chemical transport model and its impact on tropospheric ozone variability, in preparation, 2010. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Olivier, J. G. J., Berdowski, J. J. M., Peters, J. A. H. W., Bakker, J., Visschedijk, A. J. H., and Bloos, J. P. J.: Applications of EDGAR, Including a description of EDGAR 3.2: reference database with trend data for 1970–1995, RIVM, Bilthoven, RIVM report 773301 001/NRP report 410200 051, 2001. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Park, R. J., Jacob, D. J. , Field, B. D., Yantosca, R. M., and Chin, M.: Natural and transboundary pollution influences on sulfate-nitrate-ammonium aerosols in the United States: Implications for policy, J. Geophys. Res., 109, D15204, doi:10.1029/2003JD004473, 2004. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Parrish, D. D., Williams, E. J., Fahey, D. W., and Fehsenfeld, F. C.: Measurement of nitrogen oxide fluxes from softs: Intercomparison of enclosure and gradient measurement techniques, J. Geophys. Res., 92, 2165–2171, 1987. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Parton, W. J., Holland, E. A., Del Grosso, S. J., Hartman, M. D., Martin, R. E., Mosier, A. R., Ojima, D. S., and Schimel, D. S.: Generalized model for NO&lt;sub&gt;x&lt;/sub&gt; and N2O emissions from soils, J. Geophys. Res., 106, 17403–17419, 2001. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Pickering, K. E., Wang, Y., Tao, W.-K., Price, C., and Muller, J.-F.: Vertical distributions of lightning NO&lt;sub&gt;x&lt;/sub&gt; for use in regional and global chemical transport models, J. Geophys. Res., 103(D23), 31203–31216, 1998. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Potter, C. S., Matson, P. A., Vitousek, P. M., and Davidson, E. A.: Process modeling of controls on nitrogen trace gas emissions from soils worldwide, J. Geophys. Res., 101(D1), 1361–1377, 1996. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Potter, P., Ramankutty, N., Bennett, E., and Donner, S.: Characterizing the Spatial Patterns of Global Fertilizer Application and Manure Production, Earth Interact., in press, 2010. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Price, C. and Rind, D.: A simple lightning parameterization for calculating global lightning distributions, J. Geophys. Res., 97, 9919–9933, 1992. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Randerson, J. T., van der Werf, G. R., Giglio, L., Collatz, G. J., and Kasibhatla, P. S.: Global Fire Emissions Database, Version 2 (GFEDv2.1), Data set, from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A., doi:10.3334/ORNLDAAC/849, available at: http://daac.ornl.gov/, 2007. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Schindlbacher, A., Zechmeister-Boltenstern, S., and Butterbach-Bahl, K.: Effects of soil moisture and temperature on NO, NO&lt;sub&gt;2&lt;/sub&gt;, and N&lt;sub&gt;2&lt;/sub&gt;O emissions from European forest soils, J. Geophys. Res., 109, D17302, doi:10.1029/2004JD004590, 2004. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Stehfest, E. and Bouwman, L.: N&lt;sub&gt;2&lt;/sub&gt;O and NO emission from agricultural fields and soils under natural vegetation: summarizing available measurement data and modeling of global annual emissions, Nutr. Cycl. Agroecosys., 74, 207–228, doi:10.1007/s10705-006-9000-7, 2006. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Steinkamp, J., Ganzeveld, L. N., Wilcke, W., and Lawrence, M. G.: Influence of modelled soil biogenic NO emissions on related trace gases and the atmospheric oxidizing efficiency, Atmos. Chem. Phys., 9, 2663–2677, doi:10.5194/acp-9-2663-2009, 2009. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz U.S. Department of Agriculture: National Agricultural Statistics Service, Research and Development Division, 2009 Cropland Data Layer, available at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm, 2010. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz U.S. Department of Agriculture: 2007 Census of Agriculture (Map available at: http://www.agcensus.usda.gov/Publications/2007/Online_Highlights/Ag_Atlas_Maps/Farms/Land_in_Farms_and_Land_Use/07-M082.asp), 2009. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz van der Werf, G. R., Randerson, J. T., Giglio, L., Collatz, G. J., Kasibhatla, P. S., and Arellano Jr., A. F.: Interannual variability in global biomass burning emissions from 1997 to 2004, Atmos. Chem. Phys., 6, 3423–3441, doi:10.5194/acp-6-3423-2006, 2006. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz van Dijk, S. M., Gut, A. , Kirkman, G. A., Meixner, F. X., Andreae, M. O., and Gomes, B. M.: Biogenic NO emissions from forest and pasture soils: Relating laboratory studies to field measurements, J. Geophys. Res., 107(D20), 8058, doi:10.1029/2001JD000358, 2002. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz van Donkelaar, A., Martin, R. V., Leaitch, W. R., Macdonald, A. M., Walker, T. W., Streets, D. G., Zhang, Q., Dunlea, E. J., Jimenez, J. L., Dibb, J. E., Huey, L. G., Weber, R., and Andreae, M. O.: Analysis of aircraft and satellite measurements from the Intercontinental Chemical Transport Experiment (INTEX-B) to quantify long-range transport of East Asian sulfur to Canada, Atmos. Chem. Phys., 8, 2999–3014, doi:10.5194/acp-8-2999-2008, 2008. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Wang, Y. X., McElroy, M. B., Martin, R. V., Streets, D. G., Zhang, Q., and Fu, T.-M.: Seasonal variability of NO&lt;sub&gt;x&lt;/sub&gt; emissions over east China constrained by satellite observations: Implications for combustion and microbial sources, J. Geophys. Res., 112, D06301, doi:10.1029/2006JD007538, 2007. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Williams, E. J., Parrish, D. D., and Fehsenfeld, F. C.: Determination of nitrogen oxide emissions from soils: Results from a grassland site in Colorado, United States, J. Geophys. Res., 92(D2), 2173–2179, 1987. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Williams, E. J. and Fehsenfeld, F. C.: Measurement of nitrogen oxide emissions at three North American ecosystems, J. Geophys. Res., 96, 1033–1042, 1991. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Williams, E. J., Guenther, A., and Fehsenfeld, F. C.: An inventory of nitric oxide emissions from soils in the United States, J. Geophys. Res., 97, 7511–7519, 1992. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Xiao, Y., Jacob, D. J., and Turquety, S.: Atmospheric acetylene and its relationship with CO as an indicator of air mass age, J. Geophys. Res., 112, D12305, doi:10.1029/2006JD008268, 2007. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Yan, X., Ohara, T., and Akimoto, H.: Statistical modeling of global soil NO&lt;sub&gt;x&lt;/sub&gt; emissions, Global Biogeochem. Cy., 19, GB3019, doi:10.1029/2004GB002276, 2005. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> % vor jede Referenz Yienger, J. J. and Levy II, H.: Empirical model of global soil-biogenic NO$\rm_x$ emissions, J. Geophys. Res., 100, 11447–11464, 1995. </mixed-citation>
</ref>
</ref-list>
</back>
</article>