News Center

Allison Aiken Receives ‘Most Influential Scientific Minds’ Award
Sep 11, 2014 [ Facility News ]       
This summer, ARM Mobile Aerosol Observing System (MAOS) operations lead Allison Aiken was named to Thomson Reuters 2014 list of "The World’s Most Influential Scientific Minds." Aiken is currently supporting the MAOS for the mobile facility deployment in Brazil.

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Brookhaven National Laboratory Inviting Applicants for Scientific Associate
Sep 05, 2014 [ Employment Opportunities ]       
The Environmental and Climate Sciences Department of Brookhaven National Laboratory is seeking a full-time scientific associate to conduct and assist in field and laboratory measurements of atmospheric aerosols using condensation particle counters (CPCs) and scanning mobility particles spectrometers (SMPSs). This position will be responsible for the routine maintenance, repair, and calibration of aerosol instrumentation, processing [...]

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Postdoctoral Position Available at LLNL
Aug 29, 2014 [ Employment Opportunities ]       
The Cloud Processes Research Group at Lawrence Livermore National Laboratory (LLNL) invites applications for a postdoctoral position. The successful candidate will work with a team of scientists to conduct observational studies with the Atmospheric Radiation Measurement (ARM) Climate Research Facility and other major field campaign data. Possible research activities include: Evaluating and improving state-of-the-art objective analysis [...]

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LANL Seeking Radar Engineer for ARM Facility
Aug 27, 2014 [ Employment Opportunities ]       
Los Alamos National Laboratory (LANL) is currently seeking a radar engineer (Engineering Technologist 2) for the Atmospheric Radiation Measurement (ARM) Climate Research Facility. ARM sites include a broad array of instrumentation, including radars, lidars, radiometers, and meteorological sensors. The radar engineer will play an integral role developing a Field Instrument Deployments and Operations (FIDO) Radar Operations [...]

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Heartfelt Goodbye to Manus Island
Aug 27, 2014 [ Facility News, Feature Stories and Releases ]       
After 18 years, the U.S. Department of Energy’s ARM observation site at Manus Island is closed, but the data results will live on and remain available for use in the ARM Data Archive.

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Predicting Atmospheric Particle Population's Weight Gain
Aug 22, 2014 [ Research Highlights ]       
Like people, particles in the atmosphere can gain weight, and it is not easy to predict how much and how quickly they do. The culprit is newly formed carbon-containing compounds in the atmosphere, also referred to as secondary organic aerosols (SOAs), which pile on pre-existing particles, resulting in a gain in mass. It is even [...]

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Checking Up on Tropical Sunlight
Aug 22, 2014 [ Research Highlights ]       
Science is not settled on a bet or a hunch. Measurements and data support conclusions and provide clarity. Scientists at Pacific Northwest National Laboratory (PNNL) found that about 10 percent of the time two ground-based stations on a tropical island, though less than five miles apart, collect different incoming sunlight measurements based on which way [...]

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Radar Engineer for ARM Facility at PNNL
Aug 19, 2014 [ Employment Opportunities ]       
Pacific Northwest National Laboratory is currently seeking a radar engineer for the Atmospheric Radiation Measurement (ARM) Climate Research Facility. ARM sites include a broad array of instrumentation, including radars, lidars, radiometers, and meteorological sensors. The radar engineer will be responsible for performing analysis of radar data to assess the operational status of radars in the [...]

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Parameterization of Vertical Velocity in Shallow Convections
Aug 17, 2014 [ Research Highlights ]       
The parameterization of air vertical velocity within cumulus clouds in large-scale models has been a subject of active research. The mean vertical velocity in convective clouds is desired for several reasons. For example, it is needed to determine the cloud-top height. Traditionally, the neutral buoyancy level (NBL) is defined as the cloud top in most [...]

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Phase State and Physical Properties of Ambient and Lab Generated Aerosols: X-ray Microscopy
Aug 14, 2014 [ Research Highlights ]       
Models of secondary organic aerosol (SOA) formation assume that the organic fraction is a liquid with condensed phase-diffusion rates fast enough to maintain equilibrium with the gas phase. However, numerous recent studies looking at particle bounce behavior, evaporation, thermal desorption, diffusion, physical manipulation, etc., have all shown that organic matter in aerosols can have higher [...]

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Location Matters: Origin of Ice Formation Influences Mixed-phase Stratiform Clouds
Aug 13, 2014 [ Research Highlights ]       
Mixed-phase stratiform clouds are common features in the Arctic and midlatitude atmosphere. These thin clouds contain a mix of ice crystals and "supercooled" water droplets that, despite the freezing temperatures, remain in liquid form. Scientists aren't sure why these clouds can persist for long periods of time, even while steadily losing ice particles through precipitation. [...]

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Research Masters the Misunderstood Mixed-Phase Cloud
Aug 12, 2014 [ Research Highlights ]       
They are ice, they are rain—and sometimes in-between. Mixed-phase clouds, ubiquitous in the Arctic, are an enigma for scientists trying to understand their role in affecting the climate. In a study led by Dr. Mikhail Ovchinnikov at Pacific Northwest National Laboratory, scientists found that unrealistic assumptions in previous modeling studies have misled predictions about key [...]

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First MAGIC Workshop Discusses Future of Marine Clouds
Aug 12, 2014 [ Facility News ]       
Following the wrap up of the Marine ARM GPCI Investigation of Clouds (MAGIC) field campaign, a workshop was held to provide an overview of existing and planned data analysis from the campaign. In May, the First MAGIC Science Workshop, held at Brookhaven National Laboratory, was attended by 40 scientific experts. Their objectives were to discuss [...]

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Fiscal Year 2015 ASR Funding Opportunity Announced
Aug 11, 2014 [ Facility News ]       
The U.S. Department of Energy’s Office of Science is now accepting applications for Office of Biological and Environmental Research (BER) grants for under-represented research within the Atmospheric System Research (ASR) program. Priority will be given to observational, data analysis, and/or modeling studies that use data from the Atmospheric Radiation Measurement Climate Research Facility (ARM), ASR, [...]

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First MAGIC Science Workshop a Wrap
Aug 06, 2014 [ Blog, MAGIC ]       
It’s hard to believe it's been over a year since I was on the Spirit launching weather balloons, but it has. It has also been some time since the last MAGIC update, so I'll try to catch everyone up on developments and current activities. In May I organized the First MAGIC Science Workshop, which was held [...]

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Seeking Lead Mentor for the ARM Soil Water and Temperature System (SWATS)
Aug 05, 2014 [ Employment Opportunities ]       
The ARM Climate Research Facility is seeking an ARM Instrument Lead Mentor for the Soil Water and Temperature Systems (SWATS), which provides hourly soil temperature, soil-water potential and volumetric water content measurements at the Southern Great Plains site. The descriptions of the technique and variables measured are given in the SWATS Instrument Handbook. The ARM [...]

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Scientists Uncover Combustion Mechanism to Better Predict Warming by Wildfires
Aug 04, 2014 [ Research Highlights ]       
Atmospheric particulate matter (PM) plays an important role in the Earth’s radiative balance by interacting directly with solar radiation, or indirectly by acting as cloud condensation or ice nuclei. PM can exhibit negative climate forcing by enhancing scattering of solar radiation. However, over the past two decades, it has been established that a portion of [...]

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Lecturer/Associate Professor in Clouds available at the University of Reading
Aug 03, 2014 [ Employment Opportunities ]       
The University of Reading is seeking a scientist to provide research and develop leadership in the science areas associated with clouds. This position will work within the Department of Meteorology to enhance existing activity in remote sensing of clouds, cloud physics, earth observations, and radar. This position will contribute to the University of Reading’s teaching [...]

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The Anatomy and Physics of ZDR Columns
Jul 27, 2014 [ Research Highlights ]       
Observations of deep convective storms using dual-polarization radars frequently reveal columnar regions of enhanced differential reflectivity (ZDR). These so-called "ZDR columns" often extend from low levels to several kilometers above the environmental 0 °C level and represent the lofting of supercooled liquid water by the storm's updraft. Despite several decades of remote sensing observations of [...]

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Aerosol-mediated Changes in Deep Convective Cloud Radiative Forcing over the SGP
Jul 24, 2014 [ Research Highlights ]       
Studies have shown that aerosols can fuel cloud vertical development and lift cloud-top heights. Cloud anvils can also expand under the influence of aerosols. Such aerosol-mediated changes in cloud parameters can alter the cloud radiative forcing (CRF), which is often referred to as aerosol indirect forcing or the aerosol indirect effect. Among the aerosol-induced changes [...]

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Gas-Phase Dry Deposition as a Major Removal Mechanism for Secondary Organic Aerosols (SOA)
Jul 23, 2014 [ Research Highlights ]       
Removal of secondary organic aerosols (SOA) from the atmosphere has been studied far less that its equal, production. In current regional and global chemistry models, rainout of SOA particles are their dominant loss. Here, we show the importance of a less direct pathway, in which large-scale evaporation of SOA particles occurs as a re-adjustment to [...]

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Ice Concentration Retrieval in Stratiform Mixed-Phase Clouds Using Cloud Radar Measurements
Jul 21, 2014 [ Research Highlights ]       
The production of ice particles in clouds has significant impacts on their precipitation efficiency, lifetime, and radiative properties. Recent observations reveal that mixed-phase clouds, which contain both liquid droplets and ice particles, have a large global coverage and are the dominant cloud type over polar regions. The ice number concentrations (Ni) in these clouds are [...]

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