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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ANGEO</journal-id>
<journal-title-group>
<journal-title>Annales Geophysicae</journal-title>
<abbrev-journal-title abbrev-type="publisher">ANGEO</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Ann. Geophys.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1432-0576</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/angeo-27-1213-2009</article-id>
<title-group>
<article-title>Mass analysis of charged aerosol particles in NLC and PMSE during the ECOMA/MASS campaign</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Robertson</surname>
<given-names>S.</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>Horányi</surname>
<given-names>M.</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>Knappmiller</surname>
<given-names>S.</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>Sternovsky</surname>
<given-names>Z.</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>Holzworth</surname>
<given-names>R.</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>Shimogawa</surname>
<given-names>M.</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>Friedrich</surname>
<given-names>M.</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>Torkar</surname>
<given-names>K.</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>Gumbel</surname>
<given-names>J.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Megner</surname>
<given-names>L.</given-names>
</name>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Baumgarten</surname>
<given-names>G.</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Latteck</surname>
<given-names>R.</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Rapp</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hoppe</surname>
<given-names>U.-P.</given-names>
</name>
<xref ref-type="aff" rid="aff7">
<sup>7</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hervig</surname>
<given-names>M. E.</given-names>
</name>
<xref ref-type="aff" rid="aff8">
<sup>8</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Earth and Space Sciences, University of Washington, Seattle, WA 98195 USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Institute of Communication Networks and Satellite Communications, Graz University of Technology, 8010 Graz, Austria</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Space Research Institute, Austrian Academy of Sciences, 8042 Graz, Austria</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Department of Meteorology, Stockholm University, 10691 Stockholm, Sweden</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>Leibniz Institute for Atmospheric Physics, 18225 Kühlungsborn, Germany</addr-line>
</aff>
<aff id="aff7">
<label>7</label>
<addr-line>Norwegian Defence Research Establishment (FFI), 2027 Kjeller, Norway</addr-line>
</aff>
<aff id="aff8">
<label>8</label>
<addr-line>GATS, Inc., Driggs, Idaho, 83422, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>12</day>
<month>03</month>
<year>2009</year>
</pub-date>
<volume>27</volume>
<issue>3</issue>
<fpage>1213</fpage>
<lpage>1232</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2009 S. Robertson et al.</copyright-statement>
<copyright-year>2009</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://angeo.copernicus.org/articles/27/1213/2009/angeo-27-1213-2009.html">This article is available from https://angeo.copernicus.org/articles/27/1213/2009/angeo-27-1213-2009.html</self-uri>
<self-uri xlink:href="https://angeo.copernicus.org/articles/27/1213/2009/angeo-27-1213-2009.pdf">The full text article is available as a PDF file from https://angeo.copernicus.org/articles/27/1213/2009/angeo-27-1213-2009.pdf</self-uri>
<abstract>
<p>MASS (Mesospheric Aerosol Sampling Spectrometer) is a
multichannel mass spectrometer for charged aerosol particles, which was
flown from the Andøya Rocket Range, Norway, through NLC and PMSE on 3
August 2007 and through PMSE on 6 August 2007. The eight-channel analyzers
provided for the first time simultaneous measurements of the charge density
residing on aerosol particles in four mass ranges, corresponding to ice
particles with radii &amp;lt;0.5 nm (including ions), 0.5–1 nm, 1–2 nm,
and &amp;gt;3 nm (approximately). Positive and negative particles were recorded
on separate channels. Faraday rotation measurements provided electron
density and a means of checking charge density measurements made by the
spectrometer. Additional complementary measurements were made by
rocket-borne dust impact detectors, electric field booms, a photometer and
ground-based radar and lidar. The MASS data from the first flight showed
negative charge number densities of 1500–3000 cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt; for particles
with radii &amp;gt;3 nm from 83–88 km approximately coincident with PMSE
observed by the ALWIN radar and NLC observed by the ALOMAR lidar. For
particles in the 1–2 nm range, number densities of positive and negative
charge were similar in magnitude (~2000 cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt;) and for smaller
particles, 0.5–1 nm in radius, positive charge was dominant. The
occurrence of positive charge on the aerosol particles of the smallest size
and predominately negative charge on the particles of largest size suggests
that nucleation occurs on positive condensation nuclei and is followed by
collection of negative charge during subsequent growth to larger size.
Faraday rotation measurements show a bite-out in electron density that
increases the time for positive aerosol particles to be neutralized and
charged negatively. The larger particles (&amp;gt;3 nm) are observed throughout
the NLC region, 83–88 km, and the smaller particles are observed
primarily at the high end of the range, 86–88 km. The second flight into
PMSE alone at 84–88 km, found only small number densities (~500 cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt;)
of particles &amp;gt;3 nm in a narrow altitude range, 86.5–87.5 km. Both positive (~2000 cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt;)
and negative (~4500 cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt;) particles with radii 1–2 nm were detected from 85–87.5 km.</p>
</abstract>
<counts><page-count count="20"/></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"> Amyx, K., Sternovsky, Z., Knappmiller, S., Robertson, S., Horányi, M., and Gumbel, J.: In-situ measurement of smoke particles in the wintertime polar mesosphere between 80 and 85 km altitude, J. Atmos. Sol. Terr. Phys., 70, 61–70, 2008. </mixed-citation>
</ref>
<ref id="ref2">
<label>2</label><mixed-citation publication-type="other" xlink:type="simple"> Andersson, P. U. and Pettersson, J. B. C.: Ionization of water clusters by collision with graphite surfaces, Z. Phys. D, 41, 57–62, 1997. </mixed-citation>
</ref>
<ref id="ref3">
<label>3</label><mixed-citation publication-type="other" xlink:type="simple"> Arnold, F.: Ion-induced nucleation of atmospheric water vapor at the mesosphere, Planet. Space Sci., 28, 1003–1009, 1980. </mixed-citation>
</ref>
<ref id="ref4">
<label>4</label><mixed-citation publication-type="other" xlink:type="simple"> Balsiger, F., Kopp, E., Friedrich, M., Torkar, K. M., Wälchi, U., and Witt, G.: Positive ion depletion in a noctilucent cloud, Geophys. Res. Lett., 23(1), 93–96, 1996. </mixed-citation>
</ref>
<ref id="ref5">
<label>5</label><mixed-citation publication-type="other" xlink:type="simple"> Bardeen, C. G., Toon, O. B., Jensen, E. J., Marsh, D. R., and Harvey, V. L.: Numerical simulations of the three-dimensional distribution of meteoric dust in the mesosphere and upper stratosphere, J. Geophys. Res. 113, D17202, https://doi.org/10.1029/2007JD009515, 2008. </mixed-citation>
</ref>
<ref id="ref6">
<label>6</label><mixed-citation publication-type="other" xlink:type="simple"> Baumgarten, G. and Fiedler, J.: Vertical structure of particle properties and water content in noctilucent clouds, Geophys. Res. Lett., 35, L10811, https://doi.org/10.1029/2007GL033084, 2008. </mixed-citation>
</ref>
<ref id="ref7">
<label>7</label><mixed-citation publication-type="other" xlink:type="simple"> Baumgarten, G., Fiedler, J., Lübken, F.-J., and von Cossart, G.: Particle properties and water content of noctilucent clouds and their interannual variation, J. Geophys. Res., 113, D06203, https://doi.org/10.1029/2007JD008884, 2008. </mixed-citation>
</ref>
<ref id="ref8">
<label>8</label><mixed-citation publication-type="other" xlink:type="simple"> Baumgarten, G., Fiedler, J., Fricke, K. H., Gerding, M., Hervig, M., Hoffmann, P., Müller, N., Pautet, P.-D., Rapp, M., Robert, C., Rusch, D., von Savigny, C., and Singer, W.: The noctilucent cloud (NLC) display during the ECOMA/MASS sounding rocket flights on 3 August 2007: morphology on global to local scales, Ann. Geophys., 27, 953–965, 2009. </mixed-citation>
</ref>
<ref id="ref9">
<label>9</label><mixed-citation publication-type="other" xlink:type="simple"> Bird, G. A.: Molecular Gas Dynamics and the Direct simulation of Gas Flows, Oxford University Press, New York, 1994. </mixed-citation>
</ref>
<ref id="ref10">
<label>10</label><mixed-citation publication-type="other" xlink:type="simple"> Björn, L. G., Kopp, E., Hermann, U., Eberhardt, P., Dickinson, P. H. G., Mackinnon, D. J., Arnold, F., Witt, G., Lundin, A., and Jenkins, D. B.: Heavy ionospheric ions in the formation process of noctilucent clouds, J. Geophys. Res., 90(D5), 7985–798l, 1985. </mixed-citation>
</ref>
<ref id="ref11">
<label>11</label><mixed-citation publication-type="other" xlink:type="simple"> Blix, T. A., Bekkeng, J. K., Latteck, R., Lübken, F.-J., Rapp, M., Schöch, A., Singer, W., Smiley, B., and Strelnikov, B.: Rocket probing of PMSE and NLC – Results from the recent MIDAS/MACWAVE campaign, Adv. Space Res., 31(9), 2061–2067, 2003. </mixed-citation>
</ref>
<ref id="ref12">
<label>12</label><mixed-citation publication-type="other" xlink:type="simple"> Bragin, Yu. A. and Shamakhov, B. F.: Direct studies of heavy positive ions (1–2000 amu) in the upper mesosphere, Kosmicheskie Issledovaniya, 20, 644–645, 1982 (in Russian). </mixed-citation>
</ref>
<ref id="ref13">
<label>13</label><mixed-citation publication-type="other" xlink:type="simple"> Croskey, C. L., Mitchell, J. D., Friedrich, M., Torkar, K. M., Hoppe, U.-P., and Goldberg, R. A.: Electrical structure of PMSE and NLC regions during the DROPPS program, Geophys. Res. Lett., 28, 1427–1430, 2001. </mixed-citation>
</ref>
<ref id="ref14">
<label>14</label><mixed-citation publication-type="other" xlink:type="simple"> Croskey, C. L., Mitchell, J. D., Goldberg, R. A., Blix, T. A., Rapp, M., Latteck, R., Friedrich, M., and Smiley, B.: Coordinated investigation of plasma and neutral density fluctuations and particles during the MacWAVE/MIDAS summer 2002 program, Geophys. Res. Lett., 31, L24S08, https://doi.org/10.1029/2004GL020169, 2004. </mixed-citation>
</ref>
<ref id="ref15">
<label>15</label><mixed-citation publication-type="other" xlink:type="simple"> DeLand, M. T., Shettle, E. P., Thomas, G. E., and Olivero, J. J.: A quarter-century of satellite polar mesospheric cloud observations, J. Atmos. Sol. Terr. Phys., 68, 9–29, 2006. </mixed-citation>
</ref>
<ref id="ref16">
<label>16</label><mixed-citation publication-type="other" xlink:type="simple"> Dushman, S.: Scientific Foundations of Vacuum Technique, Wiley, New York, second edition, 1962. </mixed-citation>
</ref>
<ref id="ref17">
<label>17</label><mixed-citation publication-type="other" xlink:type="simple"> Fiedler, J., Baumgarten, G., and Lubken, F.-J.: NLC observations during one solar cycle above ALOMAR, J. Atmos. Sol. Terr. Phys., https://doi.org/10.1016/j.jastp.2008.11.010, in press, 2009. </mixed-citation>
</ref>
<ref id="ref18">
<label>18</label><mixed-citation publication-type="other" xlink:type="simple"> Feuerbacher, B. and Fitton, B.: Experimental investigation of photoemission from satellite surface materials, J. Appl. Phys., 43, 1563–1572, 1972. </mixed-citation>
</ref>
<ref id="ref19">
<label>19</label><mixed-citation publication-type="other" xlink:type="simple"> Friedrich, M., Torkar, K. M., Goldberg, R. A., Mitchell, J. D., Croskey, C. L., and Lehmacher, G.: Comparison of plasma probes in the lower ionosphere, Proc. 13th ESA Symposium on European Rocket and Balloon Programmes and Related Research, ESA SP-397, 381–386, 1997. </mixed-citation>
</ref>
<ref id="ref20">
<label>20</label><mixed-citation publication-type="other" xlink:type="simple"> Friedrich, M., Torkar, K. M., Singer, W., Strelnikova, I., Rapp, M., and Robertson, S.: Signatures of mesospheric particles in ionospheric data, Ann. Geophys., 27, 823–829, 2009. </mixed-citation>
</ref>
<ref id="ref21">
<label>21</label><mixed-citation publication-type="other" xlink:type="simple"> Gelinas, L. J., Lynch, K. A., Kelley, M. C., Collins, S., Baker, S., Zhou, Q., and Friedman, J. S.: First observation of meteoric charged dust in the tropical mesosphere, Geophys. Res. Lett., 25, 4047–4050, 1998, </mixed-citation>
</ref>
<ref id="ref22">
<label>22</label><mixed-citation publication-type="other" xlink:type="simple"> Goertz, C. K.: Dusty plasmas in the solar system, Rev. Geophys., 27(2), 271–292, 1989. </mixed-citation>
</ref>
<ref id="ref23">
<label>23</label><mixed-citation publication-type="other" xlink:type="simple"> Gordley, L. L., Hervig, M. E., Fish, C., Russell, J. M., Bailey, S., Cook, J., Hansen, S., Shumway, A., Paxton, G., Deaver, L., Marshall, T., Burton, J., Magill, B., Brown, C., Thompson, E., and Kemp, J.: The solar occultation for ice experiment, J. Atmos. Sol. Terr. Phys., https://doi.org/10.1016/j.jastp.2008.07.012, in press, 2008. </mixed-citation>
</ref>
<ref id="ref24">
<label>24</label><mixed-citation publication-type="other" xlink:type="simple"> Gumbel, J.: Aerodynamic influences on atmospheric in situ measurements from sounding rockets, J. Geophys. Res., 106(A6), 10553–10563, 2001. </mixed-citation>
</ref>
<ref id="ref25">
<label>25</label><mixed-citation publication-type="other" xlink:type="simple"> Gumbel, J. and Megner, L.: Charged meteoric smoke as ice nuclei in the mesosphere: Part 1 – A review of basic concepts, J. Atmos. Sol. Terr. Phys., submitted, 2009. </mixed-citation>
</ref>
<ref id="ref26">
<label>26</label><mixed-citation publication-type="other" xlink:type="simple"> Gumbel, J. and Witt, G.: Rocket-borne photometry of NLC particle populations, Adv. Space Res., 28(7), 1053–1058, 2001. </mixed-citation>
</ref>
<ref id="ref27">
<label>27</label><mixed-citation publication-type="other" xlink:type="simple"> Gumbel, J., Stegman, J., Murtagh, D. P., and Witt, G.: Scattering phase functions and particle sizes in noctilucent clouds, Geophys. Res. Lett., 28(8), 1415–1418, 2001. </mixed-citation>
</ref>
<ref id="ref28">
<label>28</label><mixed-citation publication-type="other" xlink:type="simple"> Gumbel, J., Siskind, D. E., Witt, G., Torkar, K. M., and Friedrich, M.: Influences of ice particles on the ion chemistry of the polar summer mesosphere, J. Geophys. Res., 108(D8), 8436, https://doi.org/10.1029/2002JD002413, 2003. </mixed-citation>
</ref>
<ref id="ref29">
<label>29</label><mixed-citation publication-type="other" xlink:type="simple"> Havnes, O. and Næsheim, L. I.: On the secondary charging effects and structure of mesospheric dust particles impacting on rocket probes, Ann. Geophys., 25, 623–637, 2007. </mixed-citation>
</ref>
<ref id="ref30">
<label>30</label><mixed-citation publication-type="other" xlink:type="simple"> Havnes, O., de Angelis, U., Bingham, R., Goertz, C. K., Morfill, G. E., and Tsytovich, V.: On the role of dust in the summer mesopause, J. Atmos. Sol. Terr. Phys., 52, 637–643, 1990. </mixed-citation>
</ref>
<ref id="ref31">
<label>31</label><mixed-citation publication-type="other" xlink:type="simple"> Havnes, O., Trøim, J., Blix, T., Mortensen, W., Næsheim, L. I., Thrane, E., and Tønneson, T.: First detection of charged dust particles in the Earth&apos;s mesosphere, J. Geophys. Res., 101, 10839–10847, 1996. </mixed-citation>
</ref>
<ref id="ref32">
<label>32</label><mixed-citation publication-type="other" xlink:type="simple"> Hedin, J., Gumbel, J., and Rapp, M.: On the efficiency of rocket-borne particle detection in the mesosphere, Atmos. Chem. Phys., 7, 3701–3711, 2007. </mixed-citation>
</ref>
<ref id="ref33">
<label>33</label><mixed-citation publication-type="other" xlink:type="simple"> Hervig, M. E., Gordley, L. L., Stevens, M. H., Russell, J. M., Bailey, S. M., and Baumgarten, G.: Interpretation of SOFIE PMC measurements: Cloud identification and derivation of mass density, particle shape, and particle size, J. Atmos. Sol. Terr. Phys., https://doi.org/10.1016/j.jastp.2008.07.009, in press, 2009. </mixed-citation>
</ref>
<ref id="ref34">
<label>34</label><mixed-citation publication-type="other" xlink:type="simple"> Hesstvedt, E.: Nucleation and growth of noctilucent cloud particles, Space Res., 9, 170–174, 1969. </mixed-citation>
</ref>
<ref id="ref35">
<label>35</label><mixed-citation publication-type="other" xlink:type="simple"> Hoffmann, P., Rapp, M., Serafimovich, A., and Latteck, R.: On the occurrence and formation of multiple layers of polar mesosphere summer echoes, Geophys. Res. Lett., 32, L05812, https://doi.org/10.1029/2004GL021409, 2005. </mixed-citation>
</ref>
<ref id="ref36">
<label>36</label><mixed-citation publication-type="other" xlink:type="simple"> Holzworth, R. H. and Goldberg, R. A.: Electric field measurements in noctilucent clouds, J. Geophys. Res., 109, D16203, https://doi.org/10.1029/2003JD004468, 2004. </mixed-citation>
</ref>
<ref id="ref37">
<label>37</label><mixed-citation publication-type="other" xlink:type="simple"> Hunten, D. M., Turco, R. P., and Toon, O. B.: Smoke and dust particles of meteoric origin in the mesosphere and stratosphere, J. Atmos. Sci., 37, 1342–1357, 1980. </mixed-citation>
</ref>
<ref id="ref38">
<label>38</label><mixed-citation publication-type="other" xlink:type="simple"> Jacobsen, T. A. and Friedrich, M.: Electron density measurements in the lower D-region, J. Atmos. Terr. Phys., 41, 1195–1200, 1979. </mixed-citation>
</ref>
<ref id="ref39">
<label>39</label><mixed-citation publication-type="other" xlink:type="simple"> Jensen, E. and Thomas, G. E.: Charging of mesospheric particles: implications of electron density and particle coagulation, J. Geophys. Res., 96, 18603–18615, 1991. </mixed-citation>
</ref>
<ref id="ref40">
<label>40</label><mixed-citation publication-type="other" xlink:type="simple"> Keesee, R. G.: Nucleation and particle formation in the upper atmosphere, J. Geophys. Res., 94, 14683–14692, 1989 </mixed-citation>
</ref>
<ref id="ref41">
<label>41</label><mixed-citation publication-type="other" xlink:type="simple"> Knappmiller, S., Sternovsky, Z., Robertson, S., and Friedrich, M.: A rocket-borne mass analyzer for charged aerosol particles in the mesosphere, Rev. Sci. Instrum., 79, 104502, https://doi.org/10.1063/1.2999580, 2008. </mixed-citation>
</ref>
<ref id="ref42">
<label>42</label><mixed-citation publication-type="other" xlink:type="simple"> Kopp, E. and Herrmann, U.: Ion composition in the lower ionosphere, Ann. Geophys., 2(1), 83–94, 1984. </mixed-citation>
</ref>
<ref id="ref43">
<label>43</label><mixed-citation publication-type="other" xlink:type="simple"> Kopp, E., Eberhardt, P., Herrmann, U., and Björn, L. G.: Postive ion composition of the high-latitude summer D region with noctilucent clouds, J. Geophys. Res., 90, 13041–13053, 1985. </mixed-citation>
</ref>
<ref id="ref44">
<label>44</label><mixed-citation publication-type="other" xlink:type="simple"> Krankowsky, D., Lämmerzahl, P., Götzelmann, A., Friedrich, M., and Torkar, K. M.: Positive ion composition in the lower ionosphere at high latitudes during MAP/WINE, J. Atmos. Terr. Phys.. 49(7/8), 809–818, 1987. </mixed-citation>
</ref>
<ref id="ref45">
<label>45</label><mixed-citation publication-type="other" xlink:type="simple"> Latteck, R., Singer, W., and Bardey, H.: The ALWIN MST radar – Technical design and performances, in: Proceedings of the 14th ESA Symposium on European Rocket and Ballon Programmes and Related Research, ESA SP-437, 179–184, 1999. </mixed-citation>
</ref>
<ref id="ref46">
<label>46</label><mixed-citation publication-type="other" xlink:type="simple"> Lübken, F.-J.: Thermal structure of the arctic summer mesosphere, J. Geophys. Res., 104, 9135–9149, 1999. </mixed-citation>
</ref>
<ref id="ref47">
<label>47</label><mixed-citation publication-type="other" xlink:type="simple"> Megner, L. and Gumbel, J.: Charged meteoric particles as ice nuclei in the mesosphere: Part 2 – A feasibility study, J. Atmos. Sol. Terr. Phys., submitted, 2009. </mixed-citation>
</ref>
<ref id="ref48">
<label>48</label><mixed-citation publication-type="other" xlink:type="simple"> Megner, L., Khaplanov, M., Baumgarten, G., Gumbel, J., Stegman, J., Strelnikov, B., and Robertson, S.: Large mesospheric ice particles at exceptionally high altitudes, Ann. Geophys., 27, 943–951, 2009. </mixed-citation>
</ref>
<ref id="ref49">
<label>49</label><mixed-citation publication-type="other" xlink:type="simple"> Megner, L., Rapp, M., and Gumbel, J.: Distribution of meteoric smoke – sensitivity to microphysical properties and atmospheric conditions, Atmos. Chem. Phys., 6, 4415–4426, 2006. </mixed-citation>
</ref>
<ref id="ref50">
<label>50</label><mixed-citation publication-type="other" xlink:type="simple"> Megner, L., Gumbel, J., Rapp, M., and Siskind, D. E.: Reduced meteoric smoke particle density at the summer pole – Implications for mesospheric ice particle nucleation, Adv. Space Res., 41, 41–49, 2008. </mixed-citation>
</ref>
<ref id="ref51">
<label>51</label><mixed-citation publication-type="other" xlink:type="simple"> Natanson, G. L.: On the theory of charging of a microscopic aerosol particles as a result of capture of gas ions, Zh. Tekh. Fiz., 30(5), 573–588, 1960 (English Translation: Sov. Phys. Tech. Phys. 5, 538–551, 1960). </mixed-citation>
</ref>
<ref id="ref52">
<label>52</label><mixed-citation publication-type="other" xlink:type="simple"> Pedersen, A., Tröim, J., and Kane, J. A.: Rocket measurements showing removal of electrons above the mesopause in summer at high latitude, Planet. Space Sci., 18, 945–947, 1970. </mixed-citation>
</ref>
<ref id="ref53">
<label>53</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M. and Lübken, F.-J.: Modelling of positively charged aerosols in the polar summer mesopause region, Earth Planets Space, 51, 799–807, 1999. </mixed-citation>
</ref>
<ref id="ref54">
<label>54</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M. and Lübken, F.-J.: Modelling of particle charging in the polar summer mesosphere: Part 1 – General results, J. Atmos. Sol. Terr. Phys., 63, 759–770, 2001. </mixed-citation>
</ref>
<ref id="ref55">
<label>55</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M. and Lübken, F.-J.: Polar mesosphere summer echoes (PMSE): Review of observations and current understanding, Atmos. Chem. Phys., 4, 2601–2633, 2004. </mixed-citation>
</ref>
<ref id="ref56">
<label>56</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M. and Strelnikova, I.: Measurements of meteor smoke particles during the ECOMA-2006 campaign: 1. Particle detection by active photoionization, J. Atmos. Sol. Terr. Phys., https://doi.org/10.1016/j.jastp.2008.06.002, in press, 2008. </mixed-citation>
</ref>
<ref id="ref57">
<label>57</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M., Hedin, J., Strelnikova, I., Friedrich, M., Gumbel, J., and Lübken, F.-J.: Observations of positively charged nanoparticles in the nighttime polar mesosphere, Geophys. Res. Lett., 32, L23821, https://doi.org/10.1029/2005GL024676, 2005. </mixed-citation>
</ref>
<ref id="ref58">
<label>58</label><mixed-citation publication-type="other" xlink:type="simple"> Rapp, M., Strelnikova, I., Strelnikov, B., Latteck, R., Baumgarten, G., Li, Q., Megner, L., Gumbel, J., Friedrich, M., Hoppe, U.-P., and Robertson, S.: First in situ measurement of the vertical distribution of ice volume in a mesospheric ice cloud during the ECOMA/MASS rocket-campaign, Ann. Geophys., 27, 755–766, 2009. </mixed-citation>
</ref>
<ref id="ref59">
<label>59</label><mixed-citation publication-type="other" xlink:type="simple"> Robertson, S. and Sternovsky, Z.: Effect of the induced-dipole force on the charging of aerosol particles, Phys. Plasmas, 15, 040702, https://doi.org/10.1063/1.2907162, 2008. </mixed-citation>
</ref>
<ref id="ref60">
<label>60</label><mixed-citation publication-type="other" xlink:type="simple"> Robertson, S., Smiley, B., Horányi, M., Sternovsky, Z., Gumbel, J., and Stegman, J.: Rocket-borne probes for charged ionospheric aerosol particles, IEEE Trans. Plasma Sci., 32, 716–723, 2004. </mixed-citation>
</ref>
<ref id="ref61">
<label>61</label><mixed-citation publication-type="other" xlink:type="simple"> Russell III, J. M., Bailey, S. M., Horányi, M., Gordley, L. L., Rusch, D. W., Hervig, M. E., Thomas, G. E., Randall, C. E., Siskind, D. E., Stevens, M. H., Summers, M. E., Taylor, M. I., Englert, C. R., Espy, P. J., McClintock, W. E., and Merkel, A. W.: Aeronomy of Ice in the Mesosphere (AIM): Overview and early science results, J. Atmos. Sol. Terr. Phys., in press, 2008. </mixed-citation>
</ref>
<ref id="ref62">
<label>62</label><mixed-citation publication-type="other" xlink:type="simple"> Schmidt-Ott, A., Schurtenberger, P., and Siegman, H. C.: Enormous yield of photoelectron emission from small particles, Phys. Rev. Lett., 45, 1284–1287, 1980. </mixed-citation>
</ref>
<ref id="ref63">
<label>63</label><mixed-citation publication-type="other" xlink:type="simple"> Schulte, P. and Arnold, F.: Detection of upper atmospheric negatively charged microclusters by a rocket-borne mass spectrometer, Geophys. Res. Lett., 19(23), 2297–2300, 1992. </mixed-citation>
</ref>
<ref id="ref64">
<label>64</label><mixed-citation publication-type="other" xlink:type="simple"> Smiley, B., Robertson, S., Horányi, M., Blix, T., Rapp, M., Latteck, R., and Gumbel, J.: Measurement of positively and negatively charged particles inside PMSEs during MIDAS/SOLSTICE 2001, J. Geophys. Res. 108(D8) 8444, https://doi.org/10.1029/2002JD002425, 2003. </mixed-citation>
</ref>
<ref id="ref65">
<label>65</label><mixed-citation publication-type="other" xlink:type="simple"> Sternovsky, Z., Horányi, M., and Robertson, S.: Collision cross sections of small water clusters, Phys. Rev. A, 64, 023203, https://doi.org/10.1103/PhysRevA.64.023203, 2001. </mixed-citation>
</ref>
<ref id="ref66">
<label>66</label><mixed-citation publication-type="other" xlink:type="simple"> Strelnikova, I., Rapp, M., Strelnikov, B., Baumgarten, G., Brattli, A., Svenes, K., Hoppe, U.-P., Friedrich, M., Gumbel, J., and Williams, B. P.: Measurements of meteor smoke particles during the ECOMA-2006 campaign: 2. results, J. Atmos. Sol. Terr. Phys., https://doi.org/10.1016/j.jastp.2008.07.011, in press, 2009. </mixed-citation>
</ref>
<ref id="ref67">
<label>67</label><mixed-citation publication-type="other" xlink:type="simple"> Sugiyama, T.: Ion recombination and growth of ice particles in noctilucent clouds, J. Geophys. Res. 99(A3), 3915–3929, 1994. </mixed-citation>
</ref>
<ref id="ref68">
<label>68</label><mixed-citation publication-type="other" xlink:type="simple"> Sugiyama, T.: Ionic nucleation of ice particles in noctilucent clouds, in: The Upper Mesosphere and Lower Thermosphere: A Review of Experiment and Theory, Geophysical Monograph, 87, American Geophysical Union, Washington, D.C., 209–214, 1995. </mixed-citation>
</ref>
<ref id="ref69">
<label>69</label><mixed-citation publication-type="other" xlink:type="simple"> Thomas, L. and Bowman, M. R.: Model studies of the D-region negative-ion composition during day-time and night-time, J. Atmos. Sol. Terr. Phys., 47, 547–556, 1985. </mixed-citation>
</ref>
<ref id="ref70">
<label>70</label><mixed-citation publication-type="other" xlink:type="simple"> Tsang, T., Srinivasan-Rao, T., and Fischer, J.: Surface-plasmon field-enhanced multiphoton photoelectric emission from metal films, Phys. Rev. B, 43(11), 8870–8878, 1991. </mixed-citation>
</ref>
<ref id="ref71">
<label>71</label><mixed-citation publication-type="other" xlink:type="simple"> Turco, R. P., Toon, O. B., Whitten, R. C., Keesee, R. G., and Hollenbach, D.: Noctilucent clouds: Simulation studies of their genesis properties and global influences, Planet. Space Sci., 30(11), 1147–1181, 1982. </mixed-citation>
</ref>
<ref id="ref72">
<label>72</label><mixed-citation publication-type="other" xlink:type="simple"> Ulwick, J. C., Baker, K. D., Kelley, M. C., Balsley, B. B., and Ecklund, W. L.: Comparison of simultaneous MST radar and electron density probe measurements during STATE, J. Geophys. Res., 93(D6), 6989–7000, 1988. </mixed-citation>
</ref>
<ref id="ref73">
<label>73</label><mixed-citation publication-type="other" xlink:type="simple"> Viehland, L. A. and Mason, E. A.: Transport Properties of gaseous ions over a wide energy range: IV, Atomic Data and Nuclear Data Tables, 60, 37–95, 1995. </mixed-citation>
</ref>
<ref id="ref74">
<label>74</label><mixed-citation publication-type="other" xlink:type="simple"> von Cossart, G., Fiedler, J., and von Zahn, U.: Size distributions of NLC particles as determined from 3-color observations of NLC by ground-based lidar, Geophys. Res. Lett., 26(11), 1513–1516, 1999. </mixed-citation>
</ref>
<ref id="ref75">
<label>75</label><mixed-citation publication-type="other" xlink:type="simple"> von Zahn, U., von Cossart, G., Fiedler, J., Fricke, K. H., Nelke, G., Baumgarten, G., Rees, D., Hauchecorne, A., and Adolfsen, K.: The ALOMAR Rayleigh/Mie/Raman lidar: objectives, configuration, and performance, Ann. Geophys., 18, 815–833, 2000. </mixed-citation>
</ref>
<ref id="ref76">
<label>76</label><mixed-citation publication-type="other" xlink:type="simple"> Vondrak, T., Plane, J. M. C., and Meech, S. R.: Photoemission from sodium on ice: A mechanism for positive and negative charge coexistence in the mesosphere, J. Phys. Chem. B, 110, 3860–3863, 2006a. </mixed-citation>
</ref>
<ref id="ref77">
<label>77</label><mixed-citation publication-type="other" xlink:type="simple"> Vondrak, T., Plane, J. M. C., and Meech, S. R.: Influence of submonolayer sodium adsorption on the photoemission of the Cu(111)/water ice surface, J. Chem. Phys., 125, 224702, https://doi.org/10.1063/1.2397675, 2006b. </mixed-citation>
</ref>
<ref id="ref78">
<label>78</label><mixed-citation publication-type="other" xlink:type="simple"> Vostrikov, A. A., Dubov, D. Yu., and Predtechenskiy, M. R.: Ionization of water clusters by surface collision, Chem. Phys. Lett. 139, 124–128, 1987. </mixed-citation>
</ref>
<ref id="ref79">
<label>79</label><mixed-citation publication-type="other" xlink:type="simple"> Vostrikov, A. A., Dubov, D. Yu., and Predtechenskii, M. R.: Formation of charged particles in collisions of water clusters with a surface, Sov. Phys. Tech. Phys. 33, 1153–1158, 1988. </mixed-citation>
</ref>
<ref id="ref80">
<label>80</label><mixed-citation publication-type="other" xlink:type="simple"> Vostrikov, A. A., Zadorozhny, A. M., Dubov, D. Yu., Witt, G., Kazakova, I. V., Bragin, O. A., Kazakov, V. G., Kikhtenko, V. N., Tyutin, A. A.: Ionization of water clusters by collision with surface, Z. Phys. D, 40, 542–545, 1997. </mixed-citation>
</ref>
<ref id="ref81">
<label>81</label><mixed-citation publication-type="other" xlink:type="simple"> Winkler, P. M., Steiner, G., Vrtala, A., Vehkamäki, H., Noppel, M., Lehtinen, K. E. J., Reischl, G. P., Wagner, P. E., and Kulmala, M.: Heterogeneous nucleation experiments bridging the scale from molecular ion clusters to nanoparticles, Science, 319, 1374–1377, 2008. </mixed-citation>
</ref>
<ref id="ref82">
<label>82</label><mixed-citation publication-type="other" xlink:type="simple"> Witt, G.: The nature of noctilucent clouds, Space Res. IX, 157–169, 1969. </mixed-citation>
</ref>
</ref-list>
</back>
</article>