Research Highlights

 

Highlights will be written for high-level accomplishments and published journal articles of ASR research. Each ASR principal investigator (PI) is expected to submit at least one highlight per fiscal year.

Recent Highlights

Chemical imaging of atmospheric particles

11 December 2019

Laskin, Alexander; Moffet, Ryan

Supported by: ARM ASR

Research area: Aerosol Properties

This invited review paper presents a synopsis of modern advances in chemical imaging of atmospheric particles collected on substrates during field and laboratory experiments. Discussed chemical imaging approaches provide unique experimental insights on the nature and sources of particles, understanding their physical properties, atmospheric reactivity, and transformations.

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LASIC data indicate how enhanced decoupling within a smoky MBL alters the low-cloud diurnal cycle

11 December 2019

Zhang, Jianhao; Zuidema, Paquita

Supported by: ARM ASR

Research area: Cloud-Aerosol-Precipitation Interactions

Surface-based measurements collected at Ascension Island (8° S, 15° W) during August as part of the U.S. Department of Energy Layered Atlantic Smoke Interactions with Clouds (LASIC) campaign indicate the boundary layer remains decoupled throughout the night, building up moisture near the surface. The moisture is ventilated upwards after [...]

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Molecular explanation of new particle growth rates

4 December 2019

Thornton, Joel

Supported by: ARM ASR

Research area: Aerosol Processes

The formation and growth of cloud condensation nuclei in the atmosphere (as opposed to direct emission) is estimated to account for up to half of global cloud condensation nuclei that influence cloud optical properties and thus climate. The process requires gas-to-particle conversion of organic vapors, the identity of which has [...]

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Characteristics of ice nucleating particles in and around California winter storms

27 November 2019

DeMott, Paul J.; Kreidenweis, Sonia

Supported by: ARM ASR

Research area: Cloud-Aerosol-Precipitation Interactions

Using a suite of ground-, ship- and aircraft-based measurements collected in DOE campaigns, this study characterized the spatiotemporal abundance and composition of ice nucleating particles (INPs), the vital seeds for ice crystal and precipitation formation in winter storms in California. Ocean-sourced INPs were diagnosed to dominate periods of study, with [...]

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A method to estimate in-cloud supersaturation fluctuations via ground-based remote sensing

24 November 2019

Yang, Fan; Vogelmann, Andrew M.

Supported by: ARM ASR

Research area: Cloud Processes

The supersaturation of water vapor in atmospheric clouds, which is crucial for the formation and growth of cloud droplets and drizzle, is poorly known and rarely measured. We develop a new approach that can estimate profiles of supersaturation fluctuations in stratocumulus cloud using ground-based remote-sensing measurements.

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