Ice Nucleation Propensity of Biological Particles
EMSL Project ID
49298
Abstract
The proposed study will investigate the ice nucleation propensity of atmospheric biological particles using a novel experimental platform developed in EMSL by our group. We will determine physicochemical properties of particles and their ice nucleating components at microscopic level and other controlling factors. A physical based multi-component parameterization of ice nucleation efficiency of biological particles will be derived from the experimental data. The results will be of critical importance to elucidate fundamental processes of aerosol-ice cloud interactions -- one of the most challenging problems for predictive understanding of Earth's climate change. We will utilize the newly developed capability based on an environmental scanning electron microscope (ESEM) to allow observation of ice nucleation over individual complex particles (ice nuclei, IN) relevant to biogenic emissions at temperatures and relative humidity with respect to ice (RHice) typical for ice-containing cloud formation. Using the IN-ESEM platform, the resulting nano-scale visualization of ice nucleation and quantitative characterization and ice nucleation efficiency of nucleating particles will be used to improve ice nucleation parameterizations for cloud and climate models.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2016-10-01
End Date
2019-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Co-Investigator(s)
Team Members
Related Publications
Creamean J., R.M. Kirpes, K.A. Pratt, N.J. Spada, M. Maahn, G. de Boer, and R.C. Schnell, et al. 2018. "Marine and terrestrial influences on ice nucleating particles during continuous springtime measurements in an Arctic oilfield location." Atmospheric Chemistry and Physics Discussions 18, no. 24:18023-18042. PNNL-SA-135739. doi:10.5194/acp-18-18023-2018
Mazzoleni C., and S. China. 2018. "Preface: Morphology and Internal Mixing of Atmospheric Particles." PNNL-SA-135996. Richland, WA: Pacific Northwest National Laboratory.