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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>8</volume_number>
		<issue_number>4</issue_number>
		<publication_year>2008</publication_year>
	</journal>
	<doi>10.5194/acpd-8-14497-2008</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/8/14497/2008/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/8/14497/2008/acpd-8-14497-2008.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/8/14497/2008/acpd-8-14497-2008.pdf</fulltext_pdf>
	<start_page>14497</start_page>
	<end_page>14517</end_page>
	<publication_date>2008-07-30</publication_date>
	<article_title content_type="html">Thermodynamics of homogeneous nucleation of ice particles in the polar summer mesosphere</article_title>
	<authors>
		<author numeration="1" affiliations="1">
			<name>A. Y. Zasetsky</name>
		</author>
		<author numeration="2" affiliations="2,3">
			<name>S. V. Petelina</name>
			<email>s.petelina@latrobe.edu.au</email>
		</author>
		<author numeration="3" affiliations="1">
			<name>I. M. Svishchev</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Trent University, Peterborough, Ontario, Canada</affiliation>
		<affiliation numeration="2" content_type="html">La Trobe University, Victoria, Australia</affiliation>
		<affiliation numeration="3" content_type="html">formerly at: the University of Saskatchewan, Saskatoon, Canada</affiliation>
	</affiliations>
	<abstract content_type="html">We present the hypothesis of homogeneous nucleation of ice nano-particles in
the polar summer mesosphere. The nucleation of condensed phase is traced
back to the first step on the formation pathway, which is assumed to be the
transition of water vapor to amorphous cluster. Amorphous clusters then
freeze into water ice, likely metastable cubic ice, when they reach the
critical size. The estimates based on the equilibrium thermodynamics give
the critical size (radius) of amorphous water clusters as about 1.0 nm. The
same estimates for the final transition step, that is the transformation of
cubic to hexagonal ice, give the critical size of about 15 nm at typical
upper mesospheric conditions during the polar summer (temperature &lt;i&gt;T&lt;/i&gt;=150 K,
water vapor density &amp;rho;&lt;sub&gt;vapor&lt;/sub&gt;=10&lt;sup&gt;9&lt;/sup&gt; cm&lt;sup&gt;&amp;minus;3&lt;/sup&gt;).</abstract>
	<references>
		<reference numeration="1" content_type="text"> Adams, G. W., Schmitt, J. L., and Zalabsky, R. A.: The Homogeneous nucleation of nonane, J. Chem. Phys., 81, 5074–5078, 1984. </reference>
		<reference numeration="2" content_type="text"> Allen, M. P. and Tildesley, D. J. : Computer Simulation of Liquids, Clarendon Press, Oxford, 385 pp., 1987. </reference>
		<reference numeration="3" content_type="text"> Bernath, P. F., McElroy, C. T., Abrams, M. C., Boone, C. D., Butler, M., Camy-Peyret, C., Carleer, M., Clerbaux, C., Coheur, P. F., Colin, R., DeCola, P., Bernath, P. F., McElroy, C. T., Abrams, M. C., Boone, C. D., Butler, M., Camy-Peyret, C., Carleer, M., Clerbaux, C., Coheur, P. F., Colin, R., DeCola, P., DeMaziere, M., Drummond,J. R., Dufour, D., Evans, W. F. J., Fast, H., Fussen, D., Gilbert, K., Jennings, D. E., Llewellyn, E. J., Lowe, R. P., Mahieu, E., McConnell, J. C., McHugh, M., Mcleod, S. D., Michaud, R., Midwinter, C., Nassar, R., Nichitiu, F., Nowlan, C., Rinsland, C. P., Rochon, Y. J., Rowlands, N., Semeniuk, K., Simon, P., Skelton, R., Sloan, J. J., Soucy, M. A., Strong, K., Tremblay, P., Turnbull, D., Walker, K. A., Walkty, I., Wardle, D. A., Wehrle, V., Zander, R., and Zou, J.: Atmospheric Chemistry Experiment (ACE): Mission overview, Geophys. Res. Lett., 32, L15S01, doi:10.1029/2005GL022386, 2005. </reference>
		<reference numeration="4" content_type="text"> Berendsen, H. J. C., Grigera, J. R., and Straatsma, T. P. J.: The missing term in effective pair potential, Phys. Chem., 91, 6269–6271, 1987. </reference>
		<reference numeration="5" content_type="text"> Boone, C. D., Nassar, R., Walker, K. A., Rochon, Y., Mcleod, S. D., Rinsland, C. P., and Bernath, P. F.: Retrievals for the atmospheric chemistry experiment Fourier-transform spectrometer, Appl. Optics, 44, 7218–7231, 8445, doi:10.1029/2002JD002398, 2005. </reference>
		<reference numeration="6" content_type="text"> Carleer,~M R., Boone,~C D., Walker,~K A., Bernath,~P F., Strong,~K., Sica,~R J., Randall,~C E., Vömel,~H., Kar,~J., Höpfner,~M., Milz,~M., von~Clarmann,~T., Kivi,~R., Valverde-Canossa,~J., Sioris,~C E., Izawa,~M R M., Dupuy,~E., McElroy,~C T., Drummond,~J R., Nowlan,~C R., Zou,~J., Nichitiu,~F., Lossow,~S., Urban,~J., Murtagh,~D., and Dufour,~D G.: Validation of water vapour profiles from the Atmospheric Chemistry Experiment (ACE), Atmos. Chem. Phys. Discuss., 8, 4499–4559, 2008. </reference>
		<reference numeration="7" content_type="text"> Deland, M. T., Shettle, E. P., Thomas, G. E., and Olivero, J. J.: Solar backscattered ultraviolet (SBUV) observations of polar mesospheric clouds (PMCs) over two solar cycles, J. Geophys. Res., 108(D8), 8445, doi:10.1029/2002JD002398, 2003. </reference>
		<reference numeration="8" content_type="text"> Devlin, J. P. and Buch, V.: Vibrational spectroscopy and modeling of the surface and subsurface of ice and of ice-adsorbate interactions, J. Phys. Chem., B, 101, 6095–6098, 1997. </reference>
		<reference numeration="9" content_type="text"> Devlin, J. P., Joyce, C., and Buch, V.: Infrared spectra and structures of large water clusters, J. Phys. Chem. A, 104, 1974–1977, 2000. </reference>
		<reference numeration="10" content_type="text"> Djikaev, Y. S., Tabazadeh, A., Hamill, P., and Reiss, H. J.: Thermodynamic conditions for the surface-stimulated crystallization of atmospheric droplets, J. Phys. Chem. A, 106, 10247, doi:10.1029/jp021044s, 2002. </reference>
		<reference numeration="11" content_type="text"> Eremenko, M. N., Petelina, S. V., Zasetsky, A. Y., Karlsson, B., Rinsland, C. P., Llewellyn, E. J., and Sloan, J. J.: Shape and composition of PMC particles derived from satellite remote sensing measurements, Geophys. Res. Lett., 32, L16S06, doi:10.1029/2005GL023013, 2005. </reference>
		<reference numeration="12" content_type="text"> Hale, B. N. and Plummer, P. L. M. : Molecular model for ice clusters in a supersaturated vapor, J. Chem. Phys., 61, 4012–4019, 1974. </reference>
		<reference numeration="13" content_type="text"> Hallbrucker, A., Mayer, E., and Johari, G. P.: Glass-liquid transition and the enthalpy of devitrification of annealed vapor-deposited amorphous solid water - a comparison with hyperquenched glassy water, J. Phys. Chem., 93, 4986–4990, 1989. </reference>
		<reference numeration="14" content_type="text"> Henson, B. F., Voss, L. F., Wilson, K. R., and Robinson, J. M.: Thermodynamic model of quasiliquid formation on H&lt;sub&gt;2&lt;/sub&gt;O ice: Comparison with experiment, J. Chem. Phys., 123, 144707, doi:10.1063/1.2056541, 2005. </reference>
		<reference numeration="15" content_type="text"> Hruby, J. and Holten, V.: A two-structure model of thermodynamic properties and surface tension of supercooled water, 14th Conference on Properties of Water and Steam, Kyoto, 241–246, 2004. </reference>
		<reference numeration="16" content_type="text"> Johari, G. P.: Water&apos;s size-dependent freezing to cubic ice, J. Chem. Phys., 122, 194504, doi:10.1063/1.1900723, 2005. </reference>
		<reference numeration="17" content_type="text"> Laaksonen, A. and McGraw, R.: Thermodynamics, gas-liquid nucleation, and size-dependent surface tension, Europhys. Lett., 35, 367–372, 1996. </reference>
		<reference numeration="18" content_type="text"> Lide, R.: CRC Handbook of chemistry and physics, 80th Ed., CRC Press, Boca Raton, 2504 pp., 1999. </reference>
		<reference numeration="19" content_type="text"> Lübken, F.-J.: Thermal structure of the Arctic summer mesosphere, J. Geophys. Res., 104, 9135–9149, 1999. </reference>
		<reference numeration="20" content_type="text"> McGraw, R. and A. Laaksonen: Interfacial curvature free energy, the Kelvin relation, and vapor-liquid nucleation rate, J. Chem. Phys., 106, 5284–5287, 1997. </reference>
		<reference numeration="21" content_type="text"> Murphy, D. M. and T. Koop: Review of the vapour pressures of ice and supercooled water for atmospheric applications, Q. J. Roy.Meteorol. Soc., 131, 1539–1565, 2005. </reference>
		<reference numeration="22" content_type="text"> Nose, S.: A molecular dynamics method for simulations in the canonical ensemble, Mol. Phys., 52, 255–268, 1984. </reference>
		<reference numeration="23" content_type="text"> Ostwald, W.: Studien über die Bileding und Umwandlung fester Körper, Z. Phys. Chem., 22, 289, 1897. </reference>
		<reference numeration="24" content_type="text"> Petelina, S. V., Degenstein, D. A., Llewellyn, E. J., Lloyd, N. D., Mertens, C. J., Mlynczak, M. G., and Russell, J. M. : Thermal conditions for PMC existence derived from Odin/OSIRIS and TIMED/SABER data, Geophys. Res. Lett., 32, L17813, doi:10.1029/2005GL023099, 2005. </reference>
		<reference numeration="25" content_type="text"> Petelina, S. V., Llewellyn, E. J., and Degenstein, D. A.: Properties of polar mesospheric clouds measured by Odin/OSIRIS in the Northern Hemisphere in 2002–2005, Can. J. Phys., 85, 11, 1143–1158, 2007. </reference>
		<reference numeration="26" content_type="text"> Plane, J. M. C.: Atmospheric chemistry of meteoric metals, Chem. Rev., 103, 4963-4984, 2003. </reference>
		<reference numeration="27" content_type="text"> Plane, J. M. C., Murray, B. J., Chu, X. Z., and Gardner, C. S.: Removal of meteoric iron on polar mesospheric clouds, Science, 304, 426–428, 2004. </reference>
		<reference numeration="28" content_type="text"> Rapp, M. and Thomas, G. E.: Modeling the microphysics of mesospheric ice particles: Assessment of current capabilities and basic sensitivities, J. Atmos. Sol.-Terr. Phy., 68, 7, 715–744, 2006. </reference>
		<reference numeration="29" content_type="text"> Romero-Rochin, V. and Percus, J. K.: Stress tensor of liquid-vapor states of inhomogeneous fluids, Phys. Rev. E., 53, 5130–5136, 1996. </reference>
		<reference numeration="30" content_type="text"> Sica, R J., Izawa, M R M., Walker, K A., Boone, C., Petelina, S V., Argall, P S., Bernath, P., Burns, G B., Catoire, V., Collins, R L., Daffer, W H., De~Clercq, C., Fan, Z Y., Firanski, B J., French, W J R., Gerard, P., Gerding, M., Granville, J., Innis,J L., Keckhut, P., Kerzenmacher, T., Klekociuk, A R., Kyrö, E., Lambert, J C., Llewellyn, E J., Manney, G L., McDermid, I S., Mizutani, K., Murayama, Y., Piccolo, C., Raspollini, P., Ridolfi, M., Robert, C., Steinbrecht, W., Strawbridge, K B., Strong, K., Stübi, R., and Thurairajah, B.: Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements, Atmos. Chem. Phys., 8, 35–62, 2008. </reference>
		<reference numeration="31" content_type="text"> Speedy, R. J., Debenedetti, P. G., Smith, R. S., Huang, C., and Kay, B. D.: The evaporation rate, free energy, and entropy of amorphous water at 150 K, J. Chem. Phys., 105, 240–244, 1996. </reference>
		<reference numeration="32" content_type="text"> ten Wolde, P. R. and Frenkel, D.: Homogeneous nucleation and the Ostwald step rule, Phys. Chem. Chem. Phys., 1, 2191–2196, 1999. </reference>
		<reference numeration="33" content_type="text"> Thomas, G. E.: Mesospheric Clouds and the Physics of the Mesopause Region, Rev. Geophys., 29, 553–575, 1991. </reference>
		<reference numeration="34" content_type="text"> Viisanen, Y., Strey, R., and Reiss, H.: Homogeneous nucleation rates for water, J. Chem. Phys., 99, 4680–4692, 1993. </reference>
	</references>
</article>

