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

Diffusion in large organic aerosols influences growth of ultrafine atmospheric particles

18 May 2020

Fast, Jerome D

Supported by: ASR

Research area: Aerosol Processes

The dynamics of how aerosol particles grow and their size evolves, along with how they affect Earth’s climate, are poorly understood. New research on secondary organic aerosols formed from oxidation of isoprene—a volatile organic compound released from many plants and trees—provided quantitative insights into how slow diffusion inside viscous organic particles [...]

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Bridging the model-data divide for shallow convection

15 May 2020

Gustafson, William I.; Vogelmann, Andrew M.

Supported by: ARM ASR

Research area: Cloud Distributions/Characterizations

Combining large-scale atmospheric models and observations presents a long-standing challenge for scientists because of the inherent mismatch between different space and time scales. For example, shallow convective clouds—low, puffy clouds that reflect sunlight back to space—are so small that typical atmospheric models cannot resolve them. The U.S. Department of Energy’s [...]

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Afternoon convection favored over drier or wetter land surface depending on atmospheric state

14 May 2020

Williams, Ian N.

Supported by: ARM ASR

Research area: General Circulation and Single Column Models/Parameterizations

A strong negative feedback of dry soil on convective initiation was found in atmospheric states supporting deep boundary layers. Convection and precipitation show positive relationships to surface evapotranspiration only in more humid, thermally stratified atmospheres.

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Modeling spatial heterogeneity in surface turbulent heat flux in the US Southern Great Plains

14 May 2020

Williams, Ian N.

Supported by: ARM ASR

Research area: General Circulation and Single Column Models/Parameterizations

Advances in modeling cloud dynamics call for improved land model prediction at convective storm scales. In this study, satellite and ground-based vegetation remote-sensing data were combined with land-model experiments to more accurately characterize land-surface spatial heterogeneity.

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ARM zenith radar provides insight into marine low clouds for shaping future spaceborne missions

14 May 2020

Lamer, Katia; Battaglia, Alessandro

Supported by: ARM ASR

Research area: Cloud Distributions/Characterizations

Because of their ubiquitous nature and the way they interact with solar and longwave radiation, warm marine boundary-layer (WMBL) clouds play a crucial role in the global energy budget. Unfortunately, numerical models still struggle to properly represent their properties, which ultimately affects our confidence in future climate projections. WMBL clouds cover [...]

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