2012 | B. J. Murray, D. O'Sullivan, J. D. Atkinson and M. E. Webb
Ice nucleation by particles immersed in supercooled cloud droplets is a critical process affecting cloud properties and climate. Despite its importance, our understanding of ice nucleation is limited, making it difficult to assess its impact on climate. This review summarizes the current knowledge of ice nucleation by atmospheric aerosol particles in supercooled water droplets. It focuses on mineral dusts, biological species, carbonaceous combustion products, and volcanic ash. The study introduces various ways to describe ice nucleation and quantifies the efficiency of these materials using a time-independent temperature-dependent parameter. It estimates the potential ice particle concentration produced by these aerosol types under typical atmospheric conditions. The results show that ice nucleation below -15°C is dominated by soot and mineral dusts, while above this temperature, biological materials are the only known ice nucleators. The review highlights the challenges in quantifying ice nucleation and the need for further research to improve our understanding of this process. The study also discusses the implications of ice nucleation on cloud properties, precipitation, and climate, emphasizing the importance of understanding the role of aerosol particles in cloud formation and climate change.Ice nucleation by particles immersed in supercooled cloud droplets is a critical process affecting cloud properties and climate. Despite its importance, our understanding of ice nucleation is limited, making it difficult to assess its impact on climate. This review summarizes the current knowledge of ice nucleation by atmospheric aerosol particles in supercooled water droplets. It focuses on mineral dusts, biological species, carbonaceous combustion products, and volcanic ash. The study introduces various ways to describe ice nucleation and quantifies the efficiency of these materials using a time-independent temperature-dependent parameter. It estimates the potential ice particle concentration produced by these aerosol types under typical atmospheric conditions. The results show that ice nucleation below -15°C is dominated by soot and mineral dusts, while above this temperature, biological materials are the only known ice nucleators. The review highlights the challenges in quantifying ice nucleation and the need for further research to improve our understanding of this process. The study also discusses the implications of ice nucleation on cloud properties, precipitation, and climate, emphasizing the importance of understanding the role of aerosol particles in cloud formation and climate change.