News Center

Insights to ARM Facility Activities at 2016 AGU Fall Meeting
Dec 08, 2016 [ Facility News ]       
Join us next week at the 2016 Fall Meeting of the American Geophysical Union in San Francisco. With 24,000 scientists from around the world gathering to share their latest research results in all areas of Earth science, be sure to find out how researchers are using ARM data from the U.S. Department of Energy’s ARM Facility in these 100 talks and posters.

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Observations Show That Smaller/Faster Falling Convective Ice Particles Improve GCM Simulations
Nov 27, 2016 [ Research Highlights ]       
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 [ Research Highlights ]       
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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Request for Preproposals for Use of the U.S. Department of Energy’s ARM Climate Research Facility
Nov 21, 2016 [ Facility News ]       
Proposals are now being accepted to deploy the first ARM Mobile Facility or for campaigns augmenting operations at one of the fixed or mobile atmospheric observatories.

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From a Convective Clouds Campaign, a BAMS Cover and Scads of Rich Data
Nov 21, 2016 [ Facility News ]       
Sometimes the math in climate science is pretty easy: MC3E, plus 24 authors, equals one gorgeous cover story for the September issue of the Bulletin of the American Meteorological Society (BAMS). MC3E is the Midlatitude Continental Convective Clouds Experiment, a field campaign designed to gather data on the life cycles of severe-storm cloud systems. The experiment [...]

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Capturing Clouds for LASSO Leads to New Radar Techniques
Nov 21, 2016 [ Feature Stories and Releases ]       
Modelers and measurers work together to improve cloud measurements The ARM Climate Research Facility has some of the best instruments in the world for measuring atmospheric properties, but achieving the highest-quality results requires knowing the optimal way to use them. In a recent paper, a research team used ARM data to optimize radar measurements and accompanying [...]

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Data Storage Upgrades Future-Proof ARM Field Sites—For Now
Nov 21, 2016 [ Facility News ]       
Planning makes perfect for successful upgrades to the site data systems Throughout 2016, Cory Stuart, ARM’s Site Data System (SDS) and Cyber Security Manager, and his team at Argonne National Laboratory have been methodically visiting all ARM sites to upgrade the data systems, especially storage capacity. By their last installation—completed at the Eastern North Atlantic (ENA) [...]

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ARM Pilot Featured in Trade Magazine
Nov 21, 2016 [ Facility News ]       
Clayton Eveland is one of Airport Business Magazine’s “40 under 40” From Hawaii to Alaska, Clayton Eveland is making splashes in the aviation industry. Currently a pilot for the U.S. Department of Energy (DOE) supported Gulfstream-159 aircraft, a cornerstone of the Atmospheric Radiation Measurement (ARM) Climate Research Facility, Eveland was chosen by Airport Business magazine as [...]

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ARM/ASR Veteran Researchers Win American Geophysical Union Ascent Awards
Nov 21, 2016 [ Facility News ]       
U.S. Department of Energy-funded researchers recognized at AGU Fall Meeting Susan van den Heever and Christian Jakob, two veteran Atmospheric Radiation Measurement (ARM) Climate Research Facility and Atmospheric System Research (ASR)-affiliated atmospheric scientists, have had their achievements recognized with Ascent Awards, which will be presented at the American Geophysical Union (AGU) Honors Tribute, to be held [...]

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Update on ARM User Executive Committee
Nov 21, 2016 [ Facility News ]       
During nearly two years of virtual monthly meetings and two ‘live’ get-togethers since its formation in December 2014, ARM’s User Executive Committee (UEC) has steadily gone about its business of discussing and making recommendations on issues of concern to ARM Climate Research Facility users. Throughout, the UEC has remained true to its chartered function of [...]

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Exploiting Mie Scattering in KAZR Radial Velocities to Retrieve Air Motion and DSDs
Nov 18, 2016 [ Research Highlights ]       
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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KAZR-ARSCL and KAZRCOR Products Now Available for 2011-2014 Data
Nov 16, 2016 [ Data Announcements ]       
The Active Remote Sensing of Clouds product using Ka-band ARM Zenith Radars (KAZR-ARSCL) value-added product (VAP) and KAZR Corrected Data (KAZRCOR) VAP together are successors to the retired ARSCL VAP. The ARSCL VAP was based on the Millimeter Wavelength Cloud Radar (MMCR), ARM’s original vertically-pointing cloud radar. ARSCL processing optimized MMCR reflectivities and mean Doppler [...]

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New WACR Radar Data Available for AWARE Campaign
Nov 16, 2016 [ Data Announcements ]       
The W-band ARM Cloud Radar-Active Remotely-Sensed Cloud Locations (WACR-ARSCL) provides cloud boundaries and best-estimate time-height fields of radar moments. WACR observations are corrected for velocity aliasing, and then significant detection masks are produced. The corrected WACR measurements are combined with observations from the micropulse lidar, ceilometer, soundings, rain gauge, and microwave radiometer, low-level clutter is [...]

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New Scanning ARM Cloud Radar – Advanced – Velocity Azimuth Display (SACR-ADV-VAD) Product Released to Evaluation
Nov 16, 2016 [ Data Announcements ]       
The Scanning ARM Cloud Radar-Advanced-Velocity Azimuth Display (SACR-ADV-VAD) value-added product (VAP) provides profiles of horizontal wind estimates at cloud level, using observations from the Hemispherical Sky Range Height Indicator (HS-RHI) scan strategy of the Ka-Band Scanning ARM Cloud Radar (KASACR). The VAD technique was historically used to retrieve wind field properties using weather radars. SACR-ADV-VAD employs [...]

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Potential of Higher-order Radar Moments and Slopes for Observing Arctic Ice Clouds
Nov 15, 2016 [ Research Highlights ]       
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 [ Research Highlights ]       
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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Impacts of the Manaus Pollution Plume on the Microphysical Properties of Amazonian Warm-Phase C
Nov 07, 2016 [ Research Highlights ]       
We compare cloud properties in regions affected or not by the pollution from Manaus city, in the Amazon. Cloud formed under the pollution effect present different microphysical properties, with more numerous and smaller droplets.

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A Radiation Closure Study at Both Surface and TOA Using RTM
Oct 26, 2016 [ Research Highlights ]       
Cloud macrophysical and microphysical properties have a significant impact on the radiative energy budgets at both the surface and top of atmosphere (TOA). The cloud-radiative interactions in the Arctic are even more complex due to large solar zenith angles, highly reflective snow and ice surfaces, and multiple reflections of solar radiation between the cloud [...]

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New DSD Parameterization and SR QPE from Aircraft and Surface Distrometer
Oct 26, 2016 [ Research Highlights ]       
The characteristics of stratiform rainfall in Deep Convective Systems (DCSs) have been intensively investigated through a variety of platforms, including satellite, ground-based radar, surface rain gauge network, and airborne remote measurements. Because aircraft in situ measurements have better collocations with radar observations and larger sample volumes than surface disdrometer measurements, aircraft can provide more [...]

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4D (Space-time) Ice Cloud Microphysical Properties of DCSs Retrieved from NEXRAD
Oct 26, 2016 [ Research Highlights ]       
Obtaining an accurate representation of convective processes in numerical models is a challenge for improving current and future simulations of the Earth’s climate system. A primary unresolved issue is the lack of understanding of the detailed cloud microphysical properties of deep convective systems (DCSs). Although these properties can be measured by research aircraft, such [...]

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Sub-micrometre Particulate Matter Is Primarily in Liquid Form over Amazon Rainforest
Oct 25, 2016 [ Research Highlights ]       
The rebound of submicrometer PM was studied in central Amazonia during the wet and dry seasons using a particle-impaction apparatus equipped with RH adjustment. Rebound can indicate whether a particle is liquid or non-liquid. Physical state can affect particle growth and reactivity and hence particle number, size, and composition, with important tie-ins to the connections [...]

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Estimation of Cloud Fraction Profile in Shallow Convection Using a Scanning Cloud Radar
Oct 13, 2016 [ Research Highlights ]       
Shallow convection plays a critical role in the heat and moisture transfer between the boundary layer and free atmosphere above about 2 km. However, with an average spatial scale of 0.5–1.5 km, shallow cumuli are not resolved in weather forecast and climate models, and their broken cloud coverage results in uncertainties in estimations of domain-averaged [...]

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New Method Tracks Diverse Cloud Characteristics and Evolution
Oct 04, 2016 [ Research Highlights ]       
Cloud fields composed of clouds in a wide range of sizes and at different stages of their lifetimes are difficult to compare. A new method that combines tracking individual clouds and projecting cloud populations onto the space of the cloud center of gravity altitude versus cloud mass (CvM) offers a new way to characterize the [...]

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New Instrument to Study Ice Crystal Residuals
Oct 04, 2016 [ Research Highlights ]       
A new instrument that allows separation of cloud elements to examine the physical and chemical properties of ice crystals is necessary to further our understanding of aerosol-cloud interactions.

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Unraveling the Layers of Aerosols in the Atmosphere
Oct 04, 2016 [ Research Highlights ]       
Previous studies have shown that there are large errors in the characteristics of simulated aerosol particle layers in global models that subsequently contribute to uncertainties in radiative forcing calculations. Understanding the processes that contribute to the vertical distribution of aerosols is the necessary first step to better represent the relevant atmospheric processes in climate models.

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