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<article language="en">
	<journal>
		<journal_title>Atmospheric Chemistry and Physics Discussions</journal_title>
		<journal_url>www.atmos-chem-phys-discuss.net</journal_url>
		<issn>1680-7367</issn>
		<eissn>1680-7375</eissn>
		<volume_number>9</volume_number>
		<issue_number>5</issue_number>
		<publication_year>2009</publication_year>
	</journal>
	<doi>10.5194/acpd-9-20949-2009</doi>
	<article_url>http://www.atmos-chem-phys-discuss.net/9/20949/2009/</article_url>
	<abstract_html>http://www.atmos-chem-phys-discuss.net/9/20949/2009/acpd-9-20949-2009.html</abstract_html>
	<fulltext_pdf>http://www.atmos-chem-phys-discuss.net/9/20949/2009/acpd-9-20949-2009.pdf</fulltext_pdf>
	<start_page>20949</start_page>
	<end_page>20977</end_page>
	<publication_date>2009-10-05</publication_date>
	<article_title content_type="html">Depositional ice nucleation on solid ammonium sulfate and glutaric  acid particles</article_title>
	<authors>
		<author numeration="1" affiliations="1,2">
			<name>K. J. Baustian</name>
		</author>
		<author numeration="2" affiliations="1,3">
			<name>M. E. Wise</name>
		</author>
		<author numeration="3" affiliations="1,3">
			<name>M. A. Tolbert</name>
			<email>margaret.tolbert@colorado.edu</email>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Cooperative Institute for Research in Environmental Sciences,  University of Colorado, Boulder, CO, USA</affiliation>
		<affiliation numeration="2" content_type="html">Department of Atmospheric and Oceanic Science, University of Colorado,  Boulder, CO, USA</affiliation>
		<affiliation numeration="3" content_type="html">Department of Chemistry and Biochemistry, University of Colorado,  Boulder, CO, USA</affiliation>
	</affiliations>
	<abstract content_type="html">Heterogeneous ice nucleation on solid ammonium sulfate and solid
      amorphous glutaric acid particles was studied using optical microscopy
      and Raman spectroscopy. Optical microscopy was used to detect
      selective nucleation events as water vapor was slowly introduced into
      an environmental sample cell. Particles that nucleated ice were dried
      via sublimation and examined in detail using Raman
      spectroscopy. Depositional ice nucleation occurred preferentially on
      just a few ammonium sulfate and glutaric acid particles in each
      sample. For freezing temperatures between 214 K and
      235 K average ice saturation ratios of &lt;i&gt;S&lt;/i&gt;=1.10&amp;plusmn;0.07 for
      solid ammonium sulfate and &lt;i&gt;S&lt;/i&gt;=1.39&amp;plusmn;0.16 for solid amorphous
      glutaric acid particles were determined. Experiments with externally
      mixed particles further show that ammonium sulfate is a more potent
      ice nucleus that glutaric acid. Our results suggest that heterogeneous
      nucleation on ammonium sulfate may be an important pathway for
      atmospheric ice nucleation and cirrus cloud formation when solid
      aerosol particles are available for ice formation. This pathway for
      ice formation may be particularly significant near the tropopause
      region where sulfates are abundant and other species known to be good
      ice nuclei are depleted.</abstract>
	<references>
		<reference numeration="1" content_type="text"> Abbatt,~J P D., Benz,~S., Cziczo,~D J., Kanji,~Z., Lohmann,~U., and Möhler,~O.: Solid ammonium sulfate aerosols as ice nuclei: A~pathway for cirrus cloud formation, Science, 313, 1770–1773, 2006. </reference>
		<reference numeration="2" content_type="text"> Archuleta,~C M., DeMott,~P J., and Kreidenweis,~S M.: Ice nucleation by surrogates for atmospheric mineral dust and mineral dust$/$sulfate particles at cirrus temperatures, Atmos. Chem. Phys., 5, 2617–2634, 2005. </reference>
		<reference numeration="3" content_type="text"> Buajarern,~J., Mitchem~L., and Reid,~J P.: Charactering the formation of organic layers on the surface of inorganic aerosols by raman spectroscopy, J. Phys. Chem. A, 111, 11852–11859, 2007. </reference>
		<reference numeration="4" content_type="text"> Buck,~A L.: New equations for computing vapor pressure and enhancement factor, J Appl. Meteorol., 20, 1527–1532, 1981. </reference>
		<reference numeration="5" content_type="text"> Cantrell,~W. and Heymsfield,~A.: Production of ice in tropospheric clouds: a~review, B. Am. Meteor. Soc., 6, 795–807, 2005. </reference>
		<reference numeration="6" content_type="text"> Chan,~M N., Lee,~A K Y., and Chan,~C K.: Responses of ammonium sulfate particles coated with glutaric acid to cyclic changes in relative humidity: hygroscopicity and raman characterization, Environ. Sci. Technol., 40, 6983–6989, 2006. </reference>
		<reference numeration="7" content_type="text"> Cziczo,~D J., DeMott,~P J., Brooks,~S D., Prenni,~A J., Thomson,~D S., Baumgardner,~D., Wilson,~J C., Kreidenweis,~S M., and Murphy,~D M.: Observations of organic species and atmospheric ice formation, Geophys. Res. Lett., 31, L12116, doi:10.1029/2004GL019822, 2004. </reference>
		<reference numeration="8" content_type="text"> DeMott,~P J., Cziczo,~D J., Prenni,~A J., Murphy,~D M., Kreidenweis,~S M., Thomson,~D S., Borys,~R., and Rogers,~D C.: Measurements of the concentration and composition of nuclei for cirrus formation, P Natl Am. Sci. USA, 100(25), 14655–14660, 2003a. </reference>
		<reference numeration="9" content_type="text"> DeMott,~P J., Sassen,~K., Poellot,~M R., Baumgardner,~D., Rogers,~D C., Brooks,~S D., Prenni,~A J., and Kreidenweis,~S M.: African dust aerosols as atmospheric ice nuclei, Geophys. Res. Lett., 30(14), 1732, doi:10.1029/2003GL017410, 2003b. </reference>
		<reference numeration="10" content_type="text"> DeMott,~P J., Rogers,~D C., Kreidenweis,~S M., Chen,~Y., Twohy,~C H., Baumgardner,~D., Heymsfield,~A J., and Chan,~K R.: The role of heterogeneous freezing nucleation in upper tropospheric clouds: Inferences from SUCCESS, Geophys. Res. Lett., 25, 1387–1390, 1998. </reference>
		<reference numeration="11" content_type="text"> Eastwood,~M L., Cremel,~S., Wheeler,~M., Murray,~B J., Girard,~E., and Bertram,~A K.: Effects of sulfuric acid and ammonium sulfate coatings on the ice nucleation properties of kaolinite particles, Geophys. Res. Lett., 36, L02811, doi:10.1029/2008GL035997, 2009. </reference>
		<reference numeration="12" content_type="text"> Froyd,~K D., Murphy,~D M., Sanford,~T J., Thomson,~D S., Wilson,~J C., Pfister,~L., and Lait,~L.: Aerosol composition of the tropical upper troposphere, Atmos. Chem. Phys., 9, 4363–4385, 2009. </reference>
		<reference numeration="13" content_type="text"> Gettelman,~A., Randel,~W J., Wu,~F., and Massie,~S T.: Transport of water vapor in the tropical tropopause layer, Geophys. Res. Lett., 29(9), 1–4, 2002. </reference>
		<reference numeration="14" content_type="text"> Hung,~H., Malinowski,~A., and Martin,~S T.: Ice nucleation kinetics of aerosols containing aqueous and solid ammonium sulfate particles, J Phys. Chem. A, 106, 293–306, 2002. </reference>
		<reference numeration="15" content_type="text"> IPCC, 2007: 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., Manning,~M., Chen,~Z., Marquis,~M., Averyt,~K B., Tignor,~M., and Miller,~H L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 996 pp., 2007. </reference>
		<reference numeration="16" content_type="text"> Jensen,~E J., Pfister,~L., Bui,~T V., Lawson,~P., Baker,~B., Mo,~Q., Baumgardner,~D., Weinstock,~E M., Smith,~J B., Moyer,~E J., Hanisco,~T F., Sayres,~D S., St. Clair,~J M., Alexander,~M J., Toon,~O B., and Smith,~J A.: Formation of large ($\sim $100 \unit\mum) ice crystals near the tropical tropopause, Atmos. Chem. Phys., 8, 1621–1633, 2008. </reference>
		<reference numeration="17" content_type="text"> Jensen,~E J., Toon,~O B., Pfister,~L., and Selkirk,~H B.: Dehydration of the upper troposphere and lower stratosphere by subvisible cirrus clouds near the tropical tropopause, Geophys. Res. Lett., 23(8), 825–828, 1996. </reference>
		<reference numeration="18" content_type="text"> Kanji,~Z A., Florea,~O., and Abbatt,~J P D.: Ice formation via deposition nucleation on mineral dust and organics: dependence of onset relative humidity on total particulate surface area, Environ. Res. Lett., 3, 7 pp., 025004, doi:10.1088/1748-9326/3/2/025004, 2008. </reference>
		<reference numeration="19" content_type="text"> Kanji,~Z A. and Abbatt,~J P D.: Laboratory studies of ice formation via deposition mode nucleation onto mineral dust and n-hexane soot samples, J. Geophys. Res., 111, D16204, doi:10.1029/2005JD006766, 2006. </reference>
		<reference numeration="20" content_type="text"> Kärcher,~B. and Lohmann,~U.: A~parameterization of cirrus cloud formation: Heterogeneous freezing, J Geophys. Res., 108, 4402, doi:10.1029/2002JD003220, 2003. </reference>
		<reference numeration="21" content_type="text"> Koop,~T., Luo,~B P., Tsias,~A., and Peter,~T.: Water activity as the determinant for homogeneous ice nucleation in aqueous solutions, Nature, 406, 611–614, 2000. </reference>
		<reference numeration="22" content_type="text"> Koop,~T., Ng,~H P., Molina,~L T., Molina,~M J.: A~new optical technique to study aerosol phase transitions: the nucleation of ice from \chemH_2SO_4 aerosols, J. Phys. Chem. A, 102, 8924–8931, 1998. </reference>
		<reference numeration="23" content_type="text"> Mangold,~A., Wagner,~R., Saathoff,~H., Schurath,~U., Giesemann,~C., Ebert, ~V., Kramer,~M., and Möhler,~O.: Experimental investigation of ice nucleation by different types of aerosols in the aerosol chamber AIDA: implications to microphysics of cirrus clouds, Meteorol Z., 14, 485–497, 2005. </reference>
		<reference numeration="24" content_type="text"> Martin,~S T.: Phase transitions of aqueous atmospheric particles, Chem. Rev., 100, 3403–3453, 2000. </reference>
		<reference numeration="25" content_type="text"> Marti,~J. and Mauersberger,~K.: A~survey and new measurements of ice vapor pressure at temperatures between 170 and 250 \unitK, Geophys. Res. Lett., 20, 363–366, 1993. </reference>
		<reference numeration="26" content_type="text"> Möhler,~O., Benz,~S., Saathoff,~H., Schnaiter,~M., Wagner,~R., Schneider,~J., Walter,~S., Ebert,~V., and Wagner,~S.: The effect of organic coating on the heterogeneous ice nucleation efficiency of mineral dust aerosols, Environ. Res. Lett., 3, 025007, 8 pp., 2008. </reference>
		<reference numeration="27" content_type="text"> Möhler,~O., Field,~P R., Connolly,~P., Benz,~S., Saathoff,~H., Schnaiter,~M., Wagner,~R., Cotton,~R., Kramer,~M., Mangold,~A., and Heymsfield,~A J.: Efficiency of the deposition mode ice nucleation on mineral dust particles, Atmos. Chem. Phys., 6, 3007–3021, 2006. </reference>
		<reference numeration="28" content_type="text"> Möhler,~O., Stetzer,~O., Schaefers,~S., Linke,~C., Schnaiter,~M., Tiede, ~R., Saathoff ,~H., Kramer,~M., Mangold,~A., Budz,~P., Zink,~P., Schreiner,~J., Mauersberger,~K., Haag,~W., Karcher,~B., and Schurath,~U.: Experimental investigation of homogeneous freezing of sulphuric acid particles in the aerosol chamber AIDA, Atmos. Chem. Phys., 3, 211–223, 2003. </reference>
		<reference numeration="29" content_type="text"> Mund,~C. and Zellner,~R.: Freezing nucleation of levitated single sulfuric acid$/$\chemH_2O micro-droplets. A~combined Raman- and Mie spectroscopic study, J Mol. Struct., 661–662, 491–500, 2003. </reference>
		<reference numeration="30" content_type="text"> Onasch,~T B., Siefert,~R L., Brooks,~S D., Prenni,~A J., Murray,~B., Wilson,~M A., and Tolbert,~M A.: Infrared spectroscopic study of the deliquescence and efflorescence of ammonium sulfate aerosol as a~function of temperature, J Geophys. Res., 104(D17), 317–326, 1999. </reference>
		<reference numeration="31" content_type="text"> Parsons,~M T., Mak,~J., Lipetz,~S R., and Bertram,~A K.: Deliquescence of malonic, succinic, glutaric, and adipic acid particles, J Geophys. Res., 109, D06212, doi:10.1029/2003JD004075, 2004. </reference>
		<reference numeration="32" content_type="text"> Pruppacher,~H R. and Klett,~J D.: Microphysics of clouds and precipitation, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1997. </reference>
		<reference numeration="33" content_type="text"> Prenni,~A J., Wise,~M E., Brooks,~S D., and Tolbert,~M A.: Ice nucleation in sulfuric acid and ammonium sulfate particles, J Geophys. Res., 106(D3), 3037–3044, 2001a. </reference>
		<reference numeration="34" content_type="text"> Prenni,~A J., DeMott,~P J., Kreidenweis,~S M., Sherman,~D E., Russell, ~L M., and Ming,~Y.: The effects of low molecular weight dicarboxylic acids on cloud formation, J Phys. Chem. A, 105, 11240–11248, 2001b. </reference>
		<reference numeration="35" content_type="text"> Shilling,~J E., Fortin,~T J., and Tolbert,~M A.: Depositional ice nucleation on crystalline organic and inorganic solids, J Geophys. Res., 111, D12204, doi:10.1029/2005JF006664, 2006. </reference>
		<reference numeration="36" content_type="text"> Targino,~A C., Krejci,~R., Noone,~K J., and Glantz,~P.: Single particle analysis of ice crystal residuals observed in orographic wave clouds over Scandinavia during INTACC experiment, Atmos. Chem. Phys., 6, 1977–1990, 2006. </reference>
		<reference numeration="37" content_type="text"> Twohy,~C H. and Poellot,~M R.: Chemical characteristics of ice residual nuclei in anvil cirrus clouds: evidence for homogeneous and heterogeneous ice formation, Atmos. Chem. Phys., 5, 2289–2297, 2005. </reference>
	</references>
</article>

