Kanji, Zamin Hussein Abdulali, Dr.

Dr.  Zamin Hussein Abdulali Kanji

Dr. Zamin Hussein Abdulali Kanji

Institut für Atmosphäre und Klima 

CHN  O 16.3 

Universitätstrasse 16

8092 Zürich

Switzerland

  • phone (Sec.) +41 44 633 61 61 
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Additional information

Research area

Current Research Interests (link to experimental-group page)

Heterogeneous Ice Nucleation in the Atmosphere and Cloud Microphysics Measurements

 

    • Investigations to identify ice formation conditions such as relative humidity and temperature for the nucleation of the ice phase onto natural aerosol particles in addition to lab studies where I utilise proxies such a mineral dust and soot to represent natural and anthropogenic aerosol. Heterogeneous ice nucleation experiments are done for deposition nucleation, condensation and immersion freezing pathways using a combination of Continuous Flow Thermal Gradient Diffusion Chamber (CFDC) techniques and drop freezing assays.

 

    • Influence of surface modification and chemical composition of aerosols on ice formation properties:
      A) Aerosol exposure to trace gases
      B) Aerosol processing with organic particulate and ozone (to represent oxidative processes)
      C) How surface functionalization (hydrophobic or hydrophilic) on synthetic silica particles influences heterogeneous ice nucleation of such particles.

 

    • Effects of aerosol size and surface structure on ice formation conditions:
      Identifying the size and temperature at which certain ice formation mechanisms become active. Investigating the relevance of deposition mode and how surface structure (pores) may influence the formation of ice onto substrates. Using selectively functionalism pores and surfaces on synthetic silica particles to identify the roles of pores (if any) in the deposition nucleation or condensation freezing process

 

  • Understanding the microstructure of mixed-phase clouds and the production if ice crystals in clouds. Understanding the role of secondary ice production processes with the goal of achieving closure between ice crystal number concentrations (ICNC) and ice nucleating particle (INP) concentrations with the goal of being able to predict the formation rate of IC from knowing INP concentrations for ice nucleation rates

Additional information

Publications 

*Indicates Corresponding Author

  1. Lohmann, U., Henneberger, J., Henneberg, O., Fugal, J. P., Bühl, J. and Z. A. Kanji. Persistence of orographic mixed-phase clouds (2016), Geophysical Research Letters, 43, DOI: 10.1002/2016GL071036
  2. Boose, Y., Sierau, B., García, M. I., Rodríguez, S., Alastuey, A., Linke, C., Schnaiter, M., Kupiszewski, P., Kanji, Z. A*., and U. Lohmann. Ice nucleating particles in the Saharan Air Layer (2016), Atmospheric Chemistry and Physics, 16, 9067-9087, DOI:10.5194/acp-16-9067-2016.
  3. Kohn, M., Welti, A., Lohmann, U. and Z. A. Kanji*. Immersion mode ice nucleation measurements with the new Portable Immersion Mode Cooling chAmber (PIMCA) (2016), Journal of Geophysical Research - Atmospheres,121, 4713-4733, DOI: 10.1002/2016JD024761.
  4. Boose, Y., Kanji, Z. A*., Kohn, M., Sierau, B., Zipori, A., Crawford, I., Lloyd, G., Bukowiecki, N., Herrmann, E. and P. Kupiszewski. Ice nucleating particle measurements at 241 K during winter months at 3580 m a.s.l. in the Swiss Alps (2016), Journal of Atmospheric SciencesDOI: http://dx.doi.org/10.1175/JAS-D-15-0236.1 
  5. Hiranuma, N., Augustin-Bauditz, S., Bingemer, H., Budke, C., Curtius, J., Danielczok, A., Diehl, K., Dreischmeier, K., Ebert, M., Frank, F., Hoffmann, N., Kandler, K., Kiselev, A., Koop, T., Leisner, T., Möhler, O., Nillius, B., Peckhaus, A., Rose, D., Weinbruch, S., Wex, H., Boose, Y., DeMott, P. J., Hader, J. D., Hill, T. C. J., Kanji, Z. A., Kulkarni, G., Levin, E. J. T., McCluskey, C. S., Murakami, M., Murray, B. J., Niedermeier, D., Petters, M. D., O'Sullivan, D., Saito, A., Schill, G. P., Tajiri, T., Tolbert, M. A., Welti, A., Whale, T. F., Wright, T. P., and K. Yamashita. A comprehensive laboratory study on the immersion freezing behavior of illite NX particles: a comparison of seventeen ice nucleation measurement techniques (2015), Atmospheric Chemistry and Physics, 15, 2489 - 2518, DOI: 10.5194/acp-15-2489-2015
  6. Wex, H., S. Augustin-Bauditz, Y. Boose, C. Budke, J. Curtius, K. Diehl, A. Dreyer, F. Frank, S. Hartmann, N. Hiranuma, E. Jantsch, Z. A. Kanji, A. Kiselev, T. Koop, O. Möhler, D. Niedermeier, B. Nillius, M. Rösch, D. Rose, C. Schmidt, I. Steinke, and F. Stratmann. Intercomparing different devices for the investigation of ice nucleating particles using Snomax® as test substance (2015), Atmospheric Chemistry and Physics, 15, 1463-1485, DOI:10.5194/acp-15-1463-2015.
  7. Welti, A., Z. A. Kanji., F. Lüönd, O. Stetzer and U. Lohmann. Exploring the Mechanisms of Ice Nucleation on Kaolinite: From Deposition Nucleation to Condensation Freezing (2014), Journal of the Atmospheric Sciences, 71, 16 – 36, DOI: 10.1175/JAS-D-12-0252.1.
  8. *Kanji, Z. A., A. Welti, C. Chou, O. Stetzer and U. Lohmann. Laboratory studies of immersion and deposition mode ice nucleation of ozone aged mineral dust particles (2013). Atmospheric Chemistry and Physics, 13, 9097 – 9118, DOI: 10.5194/acp-13-9097-2013.
  9. Chou, C., Kanji, Z. A., Stetzer, O., Tritscher, T., Chirico, R., Heringa, M. F., Weingartner, E., Prévôt, A. S. H., Baltensperger, U., and U. Lohmann. Effect of photochemical ageing on the ice nucleation properties of diesel and wood burning particles (2013). Atmospheric Chemistry and Physics , 13, 761-772, DOI:10.5194/acp-13-761-2013
  10. Welti, A., Lüönd, F., Kanji, Z. A., Stetzer, O., and Lohmann, U. Time dependence of immersion freezing: an experimental study on size selected kaolinite particles (2012). Atmospheric Chemistry and Physics 12, 9893-9907, DOI:10.5194/acp-12-9893-2012
  11. *Kanji, Z. A., P.J. DeMott, O. Möhler and J. P. D. Abbatt. Results from the University of Toronto Continuous Flow Diffusion Chamber at ICIS 2007: Instrument intercomparison and ice onsets for different aerosol types, (2011). Atmospheric Chemistry and Physics, 11(1), 31-41, DOI: 10.5194/acp-11-31-2011.
  12. DeMott, P.J., Möhler, O., Stetzer, O., Vali, G., Levin, Z., Petters, M. D., Murakami, M., Leisner, T., Bundke, U., Klein, H., Kanji, Z. A., Cotton, R., Jones, H., Benz, S., Brinkmann, M., Rzesanke, D., Saathoff, H., Nicolet, M., Saito, A., Nillius, B., Bingemer, H., Abbatt, J. P. D., Ardon, K., Ganor, E., Georgakopoulos, D. G., Saunders, C. Resurgence in Ice Nuclei Measurement Research (2011). Bulletin of American Meteorological Society, 92, 1623-1635, DOI:10.1175/2011BAMS3119.1
  13. Chou, C., Stetzer, O., Weingartner, E., Juranyi, Z., Kanji, Z. A. and Lohmann, U. Ice Nuclei Properties within a Saharan dust event at the Jungfraujoch in the Swiss Alps (2011). Atmospheric Chemistry and Physics, 11(10), 4725-4738, DOI:10.5194/acp-11-4725-2011
  14. *Kanji, Z. A. and J. P. D. Abbatt. Ice Nucleation onto Arizona Test Dust at Cirrus Temperatures: Effect of Temperature and Aerosol Size on Onset Relative Humidity (2010). Journal of Physical Chemistry A, 114(2), 935-941. DOI: 10.1021/jp908661m
  15. Kanji, Z. A. and J. P. D. Abbatt. The University of Toronto Continuous Flow Diffusion Chamber (UT-CFDC): A Simple Design for Ice Nucleation Studies (2009). Aerosol Science and Technology, 43: 730-738. DOI: 10.1080/02786820902889861
  16. *Kanji, Z. A., O. Florea and J. P. D. Abbatt. Ice formation via deposition nucleation on mineral dust and organics: dependence of onset relative humidity on total particulate surface area (2008). Environmental Research Letters 3(2). DOI: 10.1088/1748-9326/3/2/025004
  17. Abbatt, J. P. D., Benz, S., Cziczo, D. J., Kanji, Z., Lohmann, U., and Mohler O. Solid ammonium sulfate aerosols as ice nuclei: A pathway for cirrus cloud formation (2006). Science, 303, 1770-1773. DOI: 10.1126/science.1129726
  18. *Kanji, Z. A. and J. P. D. Abbatt. Laboratory studies of ice formation via deposition mode nucleation onto mineral dust and n-hexane soot samples (2006). Journal of Geophysical Research – Atmospheres. DOI: 10.1029/2005JD006766.
  19. Wang, Bin; Abdulali-Kanji, Zamin; Dodwell, Emily; Horton, J. Hugh; Oleschuk, Richard D. Surface characterization using chemical force microscopy and the flow performance of modified polydimethylsiloxane for microfluidic device applications. Electrophoresis (2003), 24(9), 1442-1450
  20. Wang, Bin; Chen, Lu; Abdulali-Kanji, Zamin; Horton, J. Hugh; Oleschuk, Richard D. Aging Effects on oxidized and amine-modified polydimethylsiloxane surfaces studied with chemical force titrations: Effects on electroosmotic flow rate in microfluidic channels. Langmuir (2003), 19(23), 9792-9798

Course Catalogue

Number Unit
701-1235-00L Cloud Microphysics 
 
 
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