Overview of Ice Nucleating Particles

Abstract Ice particle formation in tropospheric clouds significantly changes cloud radiative and microphysical properties. Ice nucleation in the troposphere via homogeneous freezing occurs at temperatures lower than −38°C and relative humidity with respect to ice above 140%. In the absence of these conditions, ice formation can proceed via heterogeneous nucleation aided by aerosol particles known as ice nucleating particles (INPs). In this chapter, new developments in identifying the heterogeneous freezing mechanisms, atmospheric relevance, uncertainties, and unknowns about INPs are described. The change in conventional wisdom regarding the requirements of INPs as new studies discover physical and chemical…

• NS
  National Science Foundation

  Awards: 1723548, FP7/2007-2013
• NA
  National Aeronautics and Space Administration
• EC
  European Commission

  Awards: FP7/2007-2013, 2007-2013, FP7/2007, 603445
• DF
  Deutsche Forschungsgemeinschaft

  Awards: FOR 1525, WE 4722/1-2, FP7/2007-2013, FOR 1525 INUIT
• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

  Awards: FP7/2007-2013, 200020_150169, 150169/1
• ET
  Eidgenössische Technische Hochschule Zürich

  Award: ETH-17 12-1
• FJ
  Forschungszentrum Jülich
• EA
  Environment and Climate Change Canada
• UO
  University of Illinois at Urbana-Champaign
• NS
  Natural Sciences and Engineering Research Council of Canada

  Award: FP7/2007-2013
• L
  Leibniz-Gemeinschaft
• SF
  Seventh Framework Programme

  Award: 603445
• LF
  Leibniz-Institut für Troposphärenforschung