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.

Looking at Clouds from Both Sides Now
Jan 25, 2017       
The impact of clouds on the reflection of sunlight to space depends on two key properties: cloud optical depth and droplet effective radius. Satellites provide nearly global coverage of these cloud properties, but the accuracy of the retrievals has not been evaluated. This study used ground-based retrievals to evaluate the satellite retrievals, and found good [...]

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To Evaporate or Not to Evaporate: the Question of Secondary Organic Particulate Matter Lability
Jan 07, 2017       
New research highlights a nonlabile-to-labile transition for material representative of anthropogenic secondary organic particulate matter at a threshold humidity range. This behavior differs markedly from materials representing biogenic aerosol sources, which lack such a transition.

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Less Is More: Low Aerosol Concentrations Produce High Variability in Cloud Droplet Sizes
Jan 07, 2017       
Clouds form when water vapor in the atmosphere condenses around airborne particles, or aerosols, but the exact details of the process remain relatively unknown. Researchers used large-eddy simulations (LES) to model cloud droplets that formed in Michigan Technological University’s cloud chamber by injecting various amounts of aerosols. They found that high concentrations of aerosols decreased [...]

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Daily Cycle of Cloudiness over Maritime Continent Disrupt the Madden-Julian Oscillation
Jan 06, 2017       
Every month or two, a large complex of clouds forms over the Indian Ocean and moves eastward, a pattern known as the Madden-Julian Oscillation (MJO). The MJO exhibits hard-to-predict behaviors, often weakening, as it moves across the Maritime Continent (MC; Indonesia-Malaysia and New Guinea)—so-called because of its combination of shallow seas and scattered land masses. [...]

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Reconciling Aerosol Optical Thickness and Surface Particle Mass Through Aerosol Liquid Water
Dec 27, 2016       
Scientists have long debated the cause of an anomalous pattern over the Southeast United States, where the satellite-measured summertime aerosol optical depth is greatly enhanced over its wintertime values. Ground-based measurements of aerosol mass and chemical composition, however, are inconsistent with these space-based observations.

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