Research Highlights

Members of ARM's science team are major contributors to radiation and cloud research. ARM investigators publish about 150 refereed journal articles per year, and ARM data are used in many studies published by other scientific organizations. These documented research efforts represent tangible evidence of ARM's contribution to advances in almost all areas of atmospheric radiation and cloud research. Below is a selection of summaries highlighting recently-published ARM research. The entire collection of ARM Research Highlights can be accessed using the sorting buttons at right.

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Observations Show That Smaller/Faster Falling Convective Ice Particles Improve GCM Simulations

Nov 27, 2016 Funded By: ARM ASR

Aircraft observations from multiple ARM field campaigns show that ice particles detrained from deep convective clouds are smaller and fall faster than previously assumed. We have used this new knowledge to improve the representation of convective ice in the NASA GISS global climate model (GCM), and as a result, our GCM simulation of ice [...]

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Efficient Formation of Organic Particles from Isoprene Oxidation by a New Pathway

Nov 22, 2016 Funded By: ASR

New research showed that photooxidation of isoprene, copiously emitted from many plants, forms organic aerosol more efficiently than previously believed. The study identified new compounds with real-time mass spectrometry (MS) techniques and proposed a new chemical mechanism to explain the compounds’ formation.

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Exploiting Mie Scattering in KAZR Radial Velocities to Retrieve Air Motion and DSDs

Nov 18, 2016 Funded By: ARM ASR

In order to improve our modeling of raindrop breakup and coalescence processes, we need innovative retrieval techniques that convert ARM radar observations into vertical columns of air motion and raindrop size distributions (DSDs). A new retrieval technique (Williams et al. 2016) exploits the Mie scattering signatures in KAZR (Ka-band ARM Zenith Radar) to estimate air [...]

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Potential of Higher-order Radar Moments and Slopes for Observing Arctic Ice Clouds

Nov 15, 2016 Funded By: ARM

Classical radar observations of clouds are partially ambiguous for deriving micro-physical ice cloud characteristics such as water content and particle size. Here, we investigate whether additional information contained in the higher moments (Spectrum Width, Skewness, Kurtosis) and the slopes (left and right) of the radar Doppler spectrum (that can be easily derived from modern zenith-pointing [...]

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Deep Convective Vertical Velocity Insights from ARM Profilers in the Amazon

Nov 14, 2016 Funded By: ARM ASR

Profilers have been underutilized for their unique insights into deep convective storm vertical velocity and precipitation distributions. ARM Radar Wind Profilers (RWP) in the Amazon are used to inform Global Climate Model (GCM) deep convection parameterizations. This is accomplished by characterizing the relationship between storm environment and intensity in terms of vertical velocity, convective area [...]

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