News Center

Call for Abstracts for AGU Fall Meeting and AMS Annual Meeting
Jun 29, 2016 [ AGU, Events ]       
Sessions for this year’s Fall Meeting of the American Geophysical Union and Annual Meeting of the American Meteorological Society are being announced. If you will be leading a session, please let us know. We are collecting this information to be shared on the ARM and ASR websites as they are provided, with a follow up [...]

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Smoke is in the Air
Jun 27, 2016 [ ARM Mobile Facility 1, Blog, LASIC ]       
We have the first evidence of smoke being present in the Ascension Island boundary layer from the LASIC [Layered Atlantic Smoke Interactions with Clouds] measurements from June 13 to 15. This indicates the surface-based measurements are picking up the signal of smoke present in the free troposphere and confirms the island is a good place [...]

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Prepping an Aerosol Observing System for Delivery
Jun 24, 2016 [ Blog, Field Notes, SGP ]       
This afternoon, June 21, Brookhaven National Laboratory (BNL) took delivery of the enclosure for the new Southern Great Plains (SGP) aerosol observing system (AOS). This photo shows the SeaTainer sitting in its temporary home at BNL. Over the coming months, BNL will install instruments, the inlet mast, electronics, plumbing, signal wiring and other infrastructure components. [...]

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Caring for CARES: A California Air Study Keeps Spinning a Web of Research
Jun 20, 2016 [ Feature Stories and Releases ]       
During June of 2010, a lot of people cared about the Carbonaceous Aerosols and Radiative Effects Study (CARES), a 26-day investigation of the composition, evolution, and fate of aerosols in an air transport region where both natural and urban emissions mix.

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BAMS Article Reports on a Data-Rich ARM/NASA Storm Clouds Campaign
Jun 20, 2016 [ Feature Stories and Releases ]       
Midlatitude Continental Convective Clouds Experiment to be published in upcoming edition Convective clouds distribute water, heat, and momentum throughout the lowest layer of the Earth’s atmosphere, where weather happens. They get their name from the convective motion prompted when the surface of the Earth heats up, causing air to become buoyant and rise into the atmosphere. With [...]

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Small ARM Campaigns Do Big Science, and You Could Too
Jun 20, 2016 [ Facility News ]       
Next round of deadlines for small campaigns coming up; five recently approved campaigns span from Ascension Island to Mount Bachelor Not every science campaign requires a full deployment of ARM Climate Research Facility equipment; important work can be done with just an instrument or two, or in conjunction with a larger operation. These projects fall under [...]

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Urban Emissions Significantly Enhance SOA Production at a Rural Site in the NE US
Jun 12, 2016 [ Research Highlights ]       
During our study, we observed that aerosol concentration and composition at a rural site in the Northeastern U.S. were influenced strongly by upwind urban emissions. A possible reason is that anthropogenic pollutants advected from urban areas interacted with biogenic emissions in the rural region and led to a substantial enhancement of secondary organic aerosol production.

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Chamber Studies Uncover New Pathways for Atmospheric Aerosol Growth
May 31, 2016 [ Research Highlights ]       
The first few hours following the formation of a new atmospheric aerosol particle are a competition between the growth of the particle due to the condensation of low volatility “sticky” gases and the loss of the particle by collisions with other aerosol particles. New observations from the Cosmics Leaving Outdoor Droplets (CLOUD) chamber at CERN [...]

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Spiraling Through a Storm
May 26, 2016 [ Research Highlights ]       
A multi-sensor effort that blends observations from UND Citation aircraft spirals and ground-based ARM scanning precipitation and cloud radars to investigate the signatures associated with riming and aggregation processes.

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On the Impacts of Different Definitions of Maximum Dimension for Nonspherical Cloud Particles
May 25, 2016 [ Research Highlights ]       
Knowledge of ice crystal particle size distributions (PSDs) is critical for development of microphysical parameterization schemes for numerical models and remote-sensing retrieval algorithms. Two-dimensional in situ images captured by cloud-imaging probes on aircraft are widely used to derive PSDs in term of maximum particle dimension (Dmax). However, inconsistencies in the definition of Dmax used in [...]

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Isoprene Photochemistry over the Amazon Rainforest
May 24, 2016 [ Research Highlights ]       
Isoprene is a biogenic volatile organic compound that, when oxidized by sunlight, heavily influences atmospheric chemistry over forested areas. Using field measurements from the ground and the air, this paper tracked the fate of isoprene over the central Amazon for eight weeks during the wet season. The main research site, 70 kilometers downwind of the [...]

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Regime Dependence of Cloud Water Variability Observed at the ARM Sites
May 11, 2016 [ Research Highlights ]       
Observations from ARM sites across the world have improved our understanding of how the amount of water in clouds varies at small scales. Based on these observations, a new way of describing how cloud water varies with cloud regime has been developed for use in global weather and climate models.

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Microphysical Piggybacking: Understanding the Coupling Between Cloud Dynamics and Microphysics
May 08, 2016 [ Research Highlights ]       
A novel modeling approach was developed to clearly document the impact of cloud microphysics (i.e., the model representation of growth and fallout of cloud and precipitation particles) on cloud simulations. A traditional approach is to perform parallel simulations with different microphysics schemes or scheme parameters. In such parallel simulations, clearly separating physical impacts from merely [...]

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