Research Highlights

Highlights will be written for high-level accomplishments and published journal articles of ASR research. Each PI should submit one highlight per fiscal year. To send in a research highlight, please use the submittal form.

Entrainment Rate Diurnal Cycle in Marine Stratiform Clouds
Oct 16, 2017       
Cloud entrainment, the mixing of non-turbulent cloud-free air at the edges of the cloud layer, is a central mechanism governing cloud lifecycles within the cloud-topped marine boundary layer. Cloud-top entrainment across the inversion base regulates the boundary-layer turbulence and growth, as well as the cloud cover and microphysical evolution in climatically important marine boundary-layer regimes. [...]

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A Clearer View of Mixed-Phase Conditions in Clouds
Oct 10, 2017       
Observing mixed-phase (liquid and ice) conditions in clouds is a significant challenge. Cloud phase identification from lidar is one of the most trusted methods of identifying supercooled liquid. However, the lidar beam cannot see through optically thick clouds, so researchers get an incomplete picture of clouds. Scientists at the U.S. Department of Energy led a [...]

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Finding Surface Reflectivity in a Coastal Area
Oct 10, 2017       
Accurate measurements of surface albedo—or surface reflectivity—in coastal regions with complex mixtures of distinctive surface types (land and ocean) present a great challenge for conventional approaches based on data from tower-mounted instruments and satellites. Frequently, these data are limited or unavailable. Researchers from the U.S. Department of Energy (DOE) helped demonstrate feasibility of a new [...]

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Wildfire Particles Travel a Long Way from Home
Oct 10, 2017       
Impurities in surface snow reduce the snow’s surface reflectivity (albedo), which leads to heating of the snow. The magnitude of this effect depends on the concentration and season of deposition. Scientists at the U.S. Department of Energy (DOE) participated in a study that examined the processes contributing to the transport of air impurities to [...]

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ARM Cloud Radar Simulator: a New Tool for Bridging Field Data and Climate Models
Oct 10, 2017       
Significant differences exist between how a climate model represents clouds and what instruments observe, both in terms of spatial scale and the properties of the hydrometeors that are either modeled or observed. To address these issues and minimize impacts of instrument limitations, this study developed an ARM radar simulator that converts model variables to what [...]

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