Abstract. A small fraction of freezing cloud droplets probably initiates much the precipitation above continents. Only a minute aerosol particles, so-called ice-nucleating particles (INPs), can trigger initial ice formation at ?15 ?C, which cloud-top temperatures are frequently associated with snowfall. At mountaintop site in Swiss Alps, we found that concentrations INPs active ?C be parameteri...

It has been known for several decades that some bioaerosols, such as ice-nucleation-active (INA) bacteria, especially Pseudomonas syringae strains, may play a critical potential role in the formation of clouds and precipitation. We investigated bacterial and fungal ice nuclei (IN) in rainwater samples collected from the Hulunber temperate grasslands in North China. The median freezing temperatu...

Silver iodide (AgI) is an efficient ice-nucleating material. This has been related to the close lattice match hexagonal ice, which helps nucleate ice crystals on its surface under supersaturated conditions. In turn, structure of water molecules adsorbed surface, embodied in coordination hydrogen bonds, not addressed so far. We suspected that AgI may induce ice-like among already subsaturated X-...

[1] We present a global modeling study of mixed‐phase clouds and have performed sensitivity simulations to explore the ways in which aerosol particles can affect this type of cloud. This study extends previous similar studies in that it takes into account not only the so‐called aerosol lifetime effects on mixed‐phase clouds but also aerosol effects on their albedo. Our findings generally agree ...

Certain natural organisms use micro-patterned surface chemistry, or icenucleating species, to control water condensation and ice nucleation for survival under extreme conditions. As an analogy to these biological approaches, it is shown that functionalized, hydrophilic polymers and particles deposited on the tips of superhydrophobic posts induce precise topographical control over water condensa...

Arctic amplification (AA) is simulated by all global climate models, however the spread in degree of projected warming large and underlying mechanisms driving it are poorly understood. The impact temperature dependence immersion freezing on cloud feedbacks AA studied using NASA's GEOS-5 model. Parameterizations that exhibit low ice-nucleating particle (INP) concentrations high during summer fou...