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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-12-5677-2012</article-id>
<title-group>
<article-title>Effect of bacterial ice nuclei on the frequency and intensity of lightning activity inferred by the BRAMS model</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Gonçalves</surname>
<given-names>F. L. T.</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>Martins</surname>
<given-names>J. A.</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>Albrecht</surname>
<given-names>R. I.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Morales</surname>
<given-names>C. A.</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>Silva Dias</surname>
<given-names>M. A.</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>Morris</surname>
<given-names>C. E.</given-names>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Dept. of Atmospheric Sciences, IAG/USP/Brazil, Rua do Matão 1226, 05508090, São Paulo, SP, Brazil</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Universidade Tecnológica Federal do Paraná, 86036-370, Londrina, PR, Brazil</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>DSA/CPTEC, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, SP, Brazil</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>INRA, UR407 Pathologie Végétale, 84140 Montfavet, France</addr-line>
</aff>
<pub-date pub-type="epub">
<day>02</day>
<month>07</month>
<year>2012</year>
</pub-date>
<volume>12</volume>
<issue>13</issue>
<fpage>5677</fpage>
<lpage>5689</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/12/5677/2012/acp-12-5677-2012.html">This article is available from http://www.atmos-chem-phys.net/12/5677/2012/acp-12-5677-2012.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/12/5677/2012/acp-12-5677-2012.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/12/5677/2012/acp-12-5677-2012.pdf</self-uri>
<abstract>
<p>Many studies from the last decades have shown that airborne microorganisms
can be intrinsically linked to atmospheric processes. Certain bacteria may
constitute the most active ice nuclei found in the atmosphere and might have
some influence on the formation of ice crystals in clouds. This study deals
with the ice nucleation activity of &lt;i&gt;Pseudomonas syringae&lt;/i&gt; inside of thunderstorms through
numerical simulations using BRAMS (&lt;i&gt;Brazilian Regional Atmospheric Model System&lt;/i&gt;). The numerical simulations were
developed in order to investigate the effect on the total amount of
rainwater as a function of ice nuclei (IN) &lt;i&gt;P. syringae&lt;/i&gt; concentrations with different
scenarios (classified as S2 to S4 scenarios) corresponding to a maximum of
10&lt;sup&gt;2&lt;/sup&gt; to 10&lt;sup&gt;4&lt;/sup&gt; IN bacteria per liter of cloud water plus the BRAMS
default (classified as S5 scenario). Additionally, two other scenarios were
included without any IN (S1) and the sum of RAMS default and S4 scenario
(classified as S6). The chosen radiosonde data is for 3 March 2003,
typical summertime in São Paulo City which presents a strong convective
cell. The objective of the simulations was to analyze the effect of the IN
concentrations on the BRAMS modeled cloud properties and precipitation. The
simulated electrification of the cloud permitted analysis of the total
flashes estimated from precipitable and non-precipitable ice mass fluxes in
two different lightning frequencies. Among all scenarios, only S4 and S6
presented a tendency to decrease the total cloud water, and all bacteria
scenarios presented a tendency to decrease the total amount of rain
(−8%), corroborating other reports in the literature. All bacteria
scenarios also present higher precipitable ice concentrations compared to S5
scenario, the RAMS default. The main results present the total flash number
per simulation as well. From the results, the total flash numbers, from both
lightning frequencies, in S4 and S6 scenarios, are from 3.1 to 3.7 higher
than the BRAMS default. Even the lower bacterial concentrations (scenarios
S2 and S3) produced 3 time higher number of flashes, compared to S5
scenario. This result is a function of the hydrometeors in each simulation.
In conclusion, IN bacteria could affect directly the thunderstorm structure
and lightning formation with many other microphysical implications.</p>
</abstract>
<counts><page-count count="13"/></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"> Albrecht, R. I.: Electrification of precipitating systems over the Amazon: Physical and dynamical processes of thunderstorm development, Ph.D. Dissertation, University of Sao Paulo, Sao Paulo, Brazil, 2008 (in Portuguese). </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Albrecht, R. I., Morales, C. A., and Silva Dias, M. A. F.: One dimension cloud model with electrification scheme: The dependence of the CCNS on the development of the electrical charge center, Proc. 15th International Conference on Clouds and Precipitation, Cancun, Mexico, 2008. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Altaratz, O., Reisin, T., and Levin, Z.: Simulation of the electrification of winter thunderclouds using the three-dimensional Regional Atmospheric Modeling System (RAMS) model: Single cloud simulations, J. Geophys. Res., 110, D20205, http://dx.doi.org/10.1029/2004JD005616doi:10.1029/2004JD005616, 2005. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Amato, P., Menager, M., Sancelme, M., Laj, P., Mailhot, G., and Delort, A.-M.: Microbial population in cloud water at the Puy de Dôme, Implications for the chemistry of clouds, Atmos. Environ., 39, 4143–4153, 2005. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Amato, P., Parazols, M., Sancelme, M., Laj, P., Mailhot, G., and Delort, A.-M.: Microorganisms isolated from the water phase of tropospheric clouds at the Puy de Dôme: major groups and growth abilities at low temperatures, FEMS-Microbiol. Ecol., 49, 242–254, 2007. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> Ariya, P. A. and Amyot, M.: New directions: The role of bioaerosols in atmospheric chemistry and physics, Atmos. Environ., 38, 1231–1232, 2004. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> Barthe, C. and Pinty, J.-P.: Simulation of electrified storms with comparison of the charge structure and lightning efficiency, J. Geophys. Res., 112, D19204, http://dx.doi.org/10.1029/2006JD008241doi:10.1029/2006JD008241, 2007. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> Barthe, C., Deierling, W., and Barth, M. C.: Estimation of total lightning from various storm parameters: A cloud-resolving model study, J. Geophys. Res., 115, D24202, http://dx.doi.org/10.1029/2010JD014405doi:10.1029/2010JD014405, 2010. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Bauer, H., Giebl, H., Hitzenberger, R., Kasper-Giebl, A., Reischl, G., Zibuschka, F., and Puxbaum, H.: Airborne bacteria as cloud condensation nuclei, J. Geophys. Res., 108, AAC2/1–AAC2/5, 2003. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Blyth, A. M., Christian, H. J., Driscoll, K., Gadian, A. M., and Latham, J.: Determination of ice precipitation rates and thunderstorm anvil ice contents from satellite observations of lightning, Atmos. Res., 59–60, 217–229, 2001. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> Boccippio, D. J., Koshak, W. J., and Blakeslee, R. J.: Performance assessment of the Optical Transient Detector and Lightning Imaging Sensor. Part I: Predicted diurnal variability, J. Atmos. Ocean. Tech., 19, 1318–1332, 2002. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Christner, B. C., Morris, C. E., Foreman, C. M., Cai, R., and Sands, D. C.: Ubiquity of biological ice nucleators in snowfall, Science, 319, 1214, http://dx.doi.org/10.1126/science.1149757doi:10.1126/science.1149757, 2008. </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Cotton, W. R., Tripoli, G. J., Rauber, R. M., and Mulvihill, E. A.: Numerical simulation of the effects of varying ice crystal nucleation rates and aggregation processes on orographic snowfall, J. Clim. Appl. Meteorol., 25, 1668–1680, 1986. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Deierling, W., Petersen, W. A., Latham, J., Ellis, S., and Christian, H. J.: The relationship between lightning activity and ice fluxes in thunderstorms, J. Geophys. Res., 113, D15210, http://dx.doi.org/10.1029/2007JD009700doi:10.1029/2007JD009700, 2008. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> Deguillaume, L., Leriche, M., Amato, P., Ariya, P. A., Delort, A.-M., Pöschl, U., Chaumerliac, N., Bauer, H., Flossmann, A. I., and Morris, C. E.: Microbiology and atmospheric processes: chemical interactions of primary biological aerosols, Biogeosciences, 5, 1073–1084, http://dx.doi.org/10.5194/bg-5-1073-2008doi:10.5194/bg-5-1073-2008, 2008. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> DeMott, P. J., Meyers, M. P., and Cotton, W. R.: Parameterization and impact of ice initiation 755 processes relevant to numerical model simulations of cirrus clouds, J. Atmos. Sci., 51, 77–90, 1994. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Diehl, K. and Wurzler, S.: Air parcel model simulations of a convective cloud: Bacteria acting as immersion ice nuclei, Atmos. Environ., 44, 4622–4628, 2010. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Diehl, K., Matthias-Maser, S., Mitra, S. K., and Jaenicke, R.: Laboratory studies on the ice nucleating ability of biological aerosol particles in condensation freezing, immersion freezing and contact freezing modes, J. Aerosol Sci., 31, S70–S71, 2000. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Dye, J. E., Jones, J. J., and Winn, W. P.: Observations within two regions of charge during initial thunderstorm electrification, Q. J. Roy. Meteor. Soc., 114, 1271–1290, 1989. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Elbert, W., Taylor, P. E., Andreae, M. O., and Pöschl, U.: Contribution of fungi to primary biogenic aerosols in the atmosphere: wet and dry discharged spores, carbohydrates, and inorganic ions, Atmos. Chem. Phys., 7, 4569–4588, http://dx.doi.org/10.5194/acp-7-4569-2007doi:10.5194/acp-7-4569-2007, 2007. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Freitas, S. R., Longo, K. M., Silva Dias, M. A. F., Chatfield, R., Silva Dias, P., Artaxo, P., Andreae, M. O., Grell, G., Rodrigues, L. F., Fazenda, A., and Panetta, J.: The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) – Part 1: Model description and evaluation, Atmos. Chem. Phys., 9, 2843–2861, http://dx.doi.org/10.5194/acp-9-2843-2009doi:10.5194/acp-9-2843-2009, 2009. </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Gonçalves, F. L. T., Martins, J. A., and Silva Dias, M. A. F.: Shape parameter analysis using cloud spectra and gamma functions in the numerical modeling RAMS during LBA Project at Amazonian region, Brazil, Atmos. Res., 89, 1–11, 2008. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Hallett, J. and Mossop, S. C.: Production of secondary ice particles during riming process, Nature, 249, 26–28, 1974. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Hamilton, W. D., Lenton, T. M., Spora and Gaia: How microbes fly with their clouds, Ethol. Ecol. Evol., 10, 1–16, 1998. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Helsdon Jr., J. H., Wojcik, W. A., and Farley, R. D.: An examination of thunderstorm-charging mechanisms using a two-dimensional storm electrification model, J. Geophys. Res., 106, 1165–1192, http://dx.doi.org/10.1029/2000JD900532doi:10.1029/2000JD900532, 2001. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Hoose, C., Kristjánsson, J. E., and Burrows, S. M.: How important is biological ice nucleation in clouds on a global scale?, Environ. Res. Lett., 5, 1–7, http://dx.doi.org/10.1088/1748-9326/5/2/024009doi:10.1088/1748-9326/5/2/024009, 2010. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Jaenicke, R.: Abundance of cellular material and proteins in the atmosphere. Science, 308, 5718, http://dx.doi.org/10.1126/science.1106335doi:10.1126/science.1106335, 2005. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Latham, J., Blyth, A. M., Christian, H. J., Deierling, W., and Gadian, A. M.: Determination of precipitation rates and yields from lightning measurements, J. Hydrol., 288, 13–19, 2004. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Latham, J., Petersen, W. A., Deierling, W., and Christian, H. J.: Field identification of a unique globally dominant mechanism of thunderstorm electrification, Q. J. R. Meteor. Soc., 133, 1453–1457, 2007. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Levin, Z., Teller, A., Ganor, E., and Yin, Y.: On the interactions of mineral dust, sea-salt particles, and clouds: A measurement and modeling study from the Mediterranean Israel Dust Experiment campaign, J. Geophys. Res., 110, D20202, http://dx.doi.org/10.1029/2005JD005810doi:10.1029/2005JD005810, 2005. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Mansell, E., MacGorman, D. R., Ziegler, C. L., and Straka, J. M.: Charge structureand lightning sensitivity in a simulated multicell thunderstorm, J. Geophys. Res., 110, D12101, http://dx.doi.org/10.1029/2004JD005287doi:10.1029/2004JD005287, 2005. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> Martins, J. A. and Silva Dias, M. A. F.: The impact of smoke from forest fires on the spectral dispersion of cloud droplet size distributions in the Amazonian region, Environ. Res. Lett., 4, 015002, http://dx.doi.org/10.1088/1748-9326/4/1/015002doi:10.1088/1748-9326/4/1/015002, 2009. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Martins, J. A., Silva Dias, M. A. F., and Gonçalves, F. L. T.: Impact of biomass burning aerosols on precipitation in the Amazon: A modeling case study, J. Geophys. Res., 114, 1–68, 2009. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> MacGorman, D. R. and Rust, W. D.: The electrical nature of storms, Oxford University Press, New York, 422 pp., 1998. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Meyers, M. P., Walko, R. L., Harrington, J. Y., and Cotton, W. R.: New RAMS cloud microphysics parameterization. Part II: The two-moment scheme, Atmos. Res., 45, 3–39, 1997. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Michaud, A. B., Sands, D. C., Dore, J. E., Leslie, D., Lyons, W. B., and Priscu, J. C.: The Role of Ice Nucleating Bacteria in Hailstone Formation, 11th General Meeting of the American Society for Microbiology, New Orleans, 2011. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Möhler, O., DeMott, P. J., Vali, G., and Levin, Z.: Microbiology and atmospheric processes: the role of biological particles in cloud physics, Biogeosciences, 4, 1059–1071, http://dx.doi.org/10.5194/bg-4-1059-2007doi:10.5194/bg-4-1059-2007, 2007. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> Möhler, O., Georgakopoulos, D. G., Morris, C. E., Benz, S., Ebert, V., Hunsmann, S., Saathoff, H., Schnaiter, M., and Wagner, R.: Heterogeneous ice nucleation activity of bacteria: new laboratory experiments at simulated cloud conditions, Biogeosciences, 5, 1425–1435, http://dx.doi.org/10.5194/bg-5-1425-2008doi:10.5194/bg-5-1425-2008, 2008. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> Morris, C. E., Georgakapoulos, D., and Sands, D. C.: Ice nucleation active bacteria and their potential role in precipitation, J. Phys. IV, 121, 87–103, 2004. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> Morris, C. E., Sands, D. C., Vinatzer, B. A., Glaux, C., Guilbaud, C., Buffière, A., Yan, S., Dominguez, H., and Thompson, B. M.: The life history of the plant pathogen \textitPseudomonas syringae is linked to the water cycle, ISME J., 2, 321–334, 2008. </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Morris, C. E., Sands, D. C., Vanneste, J. L., Montarry, J., Oakley, B., Guilbaud, C., and Glaux, C.: Inferring the evolutionary history of the plant pathogen \textitPseudomonas syringae from its biogeography in headwaters of rivers in North America, Europe and New Zealand, mBio, 1, e00107-10–e00107-20, 2010. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Morris, C. E., Sands, D. C., Bardin, M., Jaenicke, R., Vogel, B., Leyronas, C., Ariya, P. A., and Psenner, R.: Microbiology and atmospheric processes: research challenges concerning the impact of airborne micro-organisms on the atmosphere and climate, Biogeosciences, 8, 17–25, http://dx.doi.org/10.5194/bg-8-17-2011doi:10.5194/bg-8-17-2011, 2011. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Orser, C., Staskawicz, B. J., Panopoulos, N. J., Dahlbeck, D., and Lindow, S. E.: Cloning and expression of bacterial ice nucleation genes in \textitEscherichia coli, J. Bacteriol., 184, 359–366, 1985. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Pereyra, R. G., Avila, E. E., Castellano, N. E., and Saunders, C.: A laboratory study of graupel charging, J. Geophys. Res., 105, 20803–20812, 2000. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Petersen, W. A., Christian, H. J., and Rutledge, S. A.: TRMM observations of the global relationship between ice water content and lightning, Geophys. Res. Lett., 32, L14819, http://dx.doi.org/10.1029/2005GL023236doi:10.1029/2005GL023236, 2005. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Phillips, V. T. J., Andronache, C., Christner, B., Morris, C. E., Sands, D. C., Bansemer, A., Lauer, A., McNaughton, C., and Seman, C.: Potential impacts from biological aerosols on ensembles of continental clouds simulated numerically, Biogeosciences, 6, 987–1014, http://dx.doi.org/10.5194/bg-6-987-2009doi:10.5194/bg-6-987-2009, 2009. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Pöschl, U., Martin, S. T., Sinha, B., Chen, Q., Gunthe, S. S., Huffman, J. A., Borrmann, S., Farmer, D. K., Garland, R. M., Helas, G., Jimenez, J. L., King, S. M., Manzi, A., Mikhailov, E., Pauliquevis, T., Petters, M. D., Prenni, A. J., Roldin, P., Rose, D., Schneider, J., Su, H., Zorn, S. R., Artaxo, P., and Andreae, M. O.: Rainforest Aerosols as Biogenic Nuclei of Clouds and Precipitation in the Amazon, Science, 17, 1513–1516, 2010. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> Price, C. and Rind, D.: A Simple Lightning Parameterization for Calculating Global Lightning Distributions, J. Geophys. Res., 97, 9919–9933, http://dx.doi.org/10.1029/92JD00719doi:10.1029/92JD00719, 1992. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Pruppacher, H. R. and Klett, J. D.: Microphysics of clouds and precipitation, Atmospheric and oceanographic sciences library; 18, Kluwer, Dordrecht, 2. Rev. and Enl. Edn., 1997. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Pouleur, S., Richard, C., Martin, J. G., and Antoun, H.: Ice Nucleation Activity in \textitFusarium acuminatum and \textitFusarium avenaceum, Appl. Environ. Microbiol., 58, 2960–2964, 1992. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Rakov, V. A. and Uman, M. A.: Lightning: Physics and Effects, Cambridge: Cambridge University Press, 687 pp., 2003. </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Reynolds, S. E., Brooks, M., and Gourley, M. F.: Thunderstorm charge separation, J. Meteorol., 14, 163–178, 1957. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> Rutledge, S. A., Williams, E. R., and Keenan, T. D.: The down under Doppler and electricity experiment (DUNDEE): Overview and preliminary results, B. Am. Meteorol. Soc., 73, 3–16, 1992. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Sands, D. C., Langhans, V. E., Scharen, A. L., and de Smet, G.: The association between bacteria and rain and possible resultant meteorological implications, J. Hungarian Meteorol. Serv., 86, 148–152, 1982. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Saunders, C. P. R., Keith, W. D., and Mitzeva, R. P.: The effect of liquid water on thunderstorm charging, J. Geophys. Res., 96, 11007–11017, 1991. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Saunders, C. P. R., Bax-Norman, H., Emersic, C., Avila, E. E., and Castellano, N. E.: Laboratory studies of the effect of cloud conditions on graupel/crystal charge transfer in thunderstorm electrification, Q. J. Roy. Meteorol. Soc., 132, 2653–2673, doi:10/1256/qj.05.218, 2006. \hack </mixed-citation>
</ref>
<ref id="ref57">
<label>57</label><mixed-citation publication-type="other" xlink:type="simple"> Sattler, B., Puxbaum, H., and Psenner, R.: Bacterial growth in supercooled cloud droplets, Geophys. Res. Lett., 28, 239–242, 2001. </mixed-citation>
</ref>
<ref id="ref58">
<label>58</label><mixed-citation publication-type="other" xlink:type="simple"> Schumann, U. and Huntrieser, H.: The global lightning-induced nitrogen oxides source, Atmos. Chem. Phys., 7, 3823–3907, doi:10.5194/acp-7-3823-2007, 2007. Szyrmer, W. and Zawadzki, I.: Biogenic and anthropogenic sources of ice-forming nuclei: A review, B. Am. Meteorol. Soc., 78, 209–228, 1997. </mixed-citation>
</ref>
<ref id="ref59">
<label>59</label><mixed-citation publication-type="other" xlink:type="simple"> Takahashi, T.: Riming electrification as a charge generation mechanism in thunderstorms, J. Atmos. Sci., 35, 1536–1548, 1978. </mixed-citation>
</ref>
<ref id="ref60">
<label>60</label><mixed-citation publication-type="other" xlink:type="simple"> Takahashi, T. and Miyawaki, K.: Reexamination of riming electrification in a wind tunnel, J. Atmos. Sci., 59, 1018–1025, 2002. </mixed-citation>
</ref>
<ref id="ref61">
<label>61</label><mixed-citation publication-type="other" xlink:type="simple"> Tripoli, G. J. and Cotton, W. R.: The Colorado State University three-dimensional cloud mesoscale model, Part I: General theoretical framework and sensitivity experiments, J. Rech. Atmos., 16, 185–220, 1982. </mixed-citation>
</ref>
<ref id="ref62">
<label>62</label><mixed-citation publication-type="other" xlink:type="simple"> Vonnegut, B.: Some facts and speculations concerning the origin and role of thunderstorm electricity, Meteorol. Monogr., 5, 224–241, 1963. </mixed-citation>
</ref>
<ref id="ref63">
<label>63</label><mixed-citation publication-type="other" xlink:type="simple"> Walko, R., Cotton, W. R., Meyers, M. P., and Harrington, J. Y.: New RAMS cloud microphysics parameterization. Part I: The single-moment scheme, Atmos. Res., 38, 29–62, 1995. </mixed-citation>
</ref>
<ref id="ref64">
<label>64</label><mixed-citation publication-type="other" xlink:type="simple"> Williams, E. R.: Large-Scale Charge Separation in Thunderclouds, J. Geophys. Res., 90, 6013–6025, http://dx.doi.org/10.1029/JD090iD04p06013doi:10.1029/JD090iD04p06013, 1985. </mixed-citation>
</ref>
<ref id="ref65">
<label>65</label><mixed-citation publication-type="other" xlink:type="simple"> Williams, E. R. and Lhermitte, R. M.: Radar tests of the precipitation hypothesis for thunderstorm electrification, J. Geophys. Res., 88, 10984–10992, 1983. </mixed-citation>
</ref>
<ref id="ref66">
<label>66</label><mixed-citation publication-type="other" xlink:type="simple"> Yoshida, S., Morimoto, T., Ushio, T., and Kawasaki, Z.: A fifth-power relationship for lightning activity from Tropical Rainfall Measuring Mission satellite observations, J. Geophys. Res., 114, D09104, http://dx.doi.org/10.1029/2008JD010370doi:10.1029/2008JD010370, 2009. </mixed-citation>
</ref>
</ref-list>
</back>
</article>