News Center

New and Improved Ceilometer Datastream Available
Jan 26, 2015 [ Data Announcements ]       
Recently, the datastream for the ceilometer instrument for all sites were reprocessed. This end-to-end reprocessing task corrected a couple of problems in the formatting of CEIL data and resulted in a new datastream name. First, the “V” in VCEIL was dropped because it represented the name of the vendor. New data standards for ARM require that [...]

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Chasing Aerosols and Atmospheric Rivers
Jan 23, 2015 [ Feature Stories and Releases ]       
Over the next six weeks during the ARM Cloud Aerosol Precipitation Experiment, DOE's second ARM mobile facility and ARM Aerial Facility will be collecting data to improve computer models that predict extreme events in a changing climate. Researchers are hoping to find more answers to atmospheric rivers—a phenomenon only identified by scientists in the last 15 years—and aerosol-precipitation interactions.

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New MICROARSCL Evaluation Data Released for Barrow, Alaska
Jan 23, 2015 [ Data Announcements ]       
A new evaluation release of 18 months of data from Barrow, Alaska, provides the first KAZR-based Micro-Active Remote Sensing of Clouds (MICROARSCL) data from this North Slope of Alaska (NSA) site. The addition of the KAZR data to the NSA site adds additional temporal and spatial resolution relative to the retired Millimeter Wavelength Cloud Radar [...]

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An Update of WACR-ARSCL: Evaluation VAP Data Available
Jan 23, 2015 [ Data Announcements ]       
New data sets from the 95 GHz W-band ARM Cloud Radar-Active Remote Sensing of Clouds (WACR-ARSCL) are now available for download as an evaluation value-added product (VAP) for the ARM Mobile Facility (AMF) deployments in Hyytiälä, Finland, from February through September 2014, and Manacapuru, Brazil, from January through December 2014. Evaluation data have been previously [...]

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Survey Says! User Executive Committee Selected
Jan 20, 2015 [ Facility News ]       
Your votes have been processed and the new ARM User Executive Committee (UEC) selected. Members were selected to represent a set of science thematic areas. This committee will be an independent body charged with providing objective, timely feedback to the leadership of the ARM Facility with respect to the user experience. Reporting directly to the [...]

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Studying the Amazon Basin’s Climate by Air and by Land
Jan 15, 2015 [ Facility News, Feature Stories and Releases ]       
Scientists have now completed the first half of the interagency Green Ocean Amazon (GOAMAZON) campaign, a two-year study to determine how Mother Nature interacts with pollution from a city of 2 million people and the impact that interaction has on the pristine and delicate climate of Brazil’s Amazon Basin.

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Seeing the Silver Lining: Challenges and Champions of Arctic Cloud Studies on Alaska’s North Slope
Jan 12, 2015 [ Facility News ]       
Unmanned Aircraft at Oliktok Point Welcome to the North Slope of Alaska, home to polar bears, caribou, arctic foxes, petroleum-rich wilderness, and four nautical miles of restricted air space. At Oliktok Point, along the Beaufort Sea, the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Climate Research Facility deployed its third ARM Mobile Facility (AMF3) giving [...]

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Sensitivity of Arctic Mixed-Phase Stratocumulus to Surface-Layer and Cloud-Top Moisture Sources
Jan 09, 2015 [ Research Highlights ]       
Arctic mixed-phase stratocumulus cloud systems (AMPS) play an important role in determining the structure of the Arctic atmospheric boundary layer and magnitudes of surface energy budget terms, due to the presence of radiatively important supercooled cloud liquid water. AMPS occur in significantly different environments than subtropical stratocumuli. For example, AMPS are observed above both stable [...]

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Seeing the Forest Through the Trees—And to the Aerosols
Jan 09, 2015 [ Facility News, Feature Stories and Releases ]       
Nine months in the icy, cold forests of Finland was not what the second ARM Mobile Facility (AMF2) was primarily created for, but because of its adaptability and reputation for stability in various climates and weather conditions, the AMF2 was essential for the Biogenic Aerosols - Effects on Clouds and Climate Campaign.

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Eastern North Atlantic Site Expands Data Capabilities
Jan 06, 2015 [ Facility News, Feature Stories and Releases ]       
The now one-year-old climate research site has filled with instruments that will lead to cutting-edge research data.

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A Comprehensive Parameterization of Heterogeneous Ice Nucleation of Dust Surrogate
Dec 30, 2014 [ Research Highlights ]       
Reducing uncertainty in predicting climate change requires understanding ice clouds. At supercooled temperatures, many kinds of airborne aerosol particles can promote ice nucleation. In this paper, researchers, including scientists at DOE’s Pacific Northwest National Laboratory, developed and tested a new heterogeneous ice nucleation parameterization that covers a wide temperature range.

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Postdoctoral Researcher Position Available at the University of Reading
Dec 27, 2014 [ Employment Opportunities ]       
The University of Reading invites applications for a postdoctoral researcher in the department of meteorology. This research scientist position will contribute to a multi-institute European Union 7th Framework Programme project, "Dynamics-aerosol-chemistry-cloud interactions in West Africa" (DACCIWA), which will quantify the influence of anthropogenic and natural emissions on the atmospheric composition over South West Africa and [...]

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Cow Pastures and Oil Rigs
Dec 23, 2014 [ Blog, Field Notes, SGP ]       
It is four-thirty on a Sunday morning when my cellphone chirps, rousing me from my deep sleep. As I transition from a horizontal to vertical state, and amidst the muddled fog of dream fragments, I am struck with a thought. One that will float through my mind many times throughout the next three days: I’m going [...]

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New 3D Tour Brings Users to the Southern Great Plains Site…Virtually
Dec 23, 2014 [ Facility News ]       
A virtual tour of the Southern Great Plains Central Facility site is now available. The SGP tour is the first in a series of virtual tours for the ARM Facility and will be followed by tours featuring the North Slope of Alaska and Eastern North Atlantic.

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ARM Facility Insights at the 2014 AGU Fall Meeting
Dec 13, 2014 [ Facility News ]       
On Monday, December 15, ARM Facility leadership held the ARM Next Generation Town Hall at the 47th annual AGU Fall Meeting. Their presentation is being made available for those who are interested as well as a comprehensive list of the DOE research using ARM data at AGU. On Thursday, December 18, a press workshop will be held for the upcoming CalWater2 and ARM Cloud Aerosol Precipitation Experiment (ACAPEX), an interagency, interdisciplinary, field campaign starting in January.

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Water Vapor Turbulence Statistics in the Convective Boundary Layer
Dec 09, 2014 [ Research Highlights ]       
Turbulence is a process that redistributes water vapor and other atmospheric gases, sensible heat, and momentum in the atmosphere. It is a stochastic process, and is best represented by statistics of various moments. It has been shown that the Atmospheric Radiation Measurement (ARM) Raman lidar has the accuracy and noise level to measure the second- [...]

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Validating Water Vapor Turbulence Measurements from Lidar
Dec 08, 2014 [ Research Highlights ]       
Turbulence in the convective boundary layer is important for redistributing water vapor and other atmospheric gases, sensible heat, and momentum. Turbulent mixing works over a wide range of scales from kilometers down to millimeters. The horizontal and vertical resolutions of most atmospheric models, such as general circulation and cloud resolving models, are too coarse to [...]

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Hail Generation and Melting in Deep Convective Clouds from the Perspective of Dual-polarization
Dec 02, 2014 [ Research Highlights ]       
Large hail is generated in vigorous convective updrafts which are commonly associated with columnar regions of enhanced differential reflectivity (ZDR columns) often capped with the depression of the cross-correlation coefficient ρhv measured by dual-polarization radars. After hailstones fall below the freezing level, they melt and produce large raindrops making a hail/rain mixture, which is characterized [...]

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ARM Educational Outreach Puts Fun Twist on Science Night
Dec 02, 2014 [ Education, Facility News ]       
Community STEM Event Draws Big Crowds In November, ARM communications staff and scientists participated in the 6th annual Chief Joseph Middle School Science Night in Richland, Washington. Hundreds of students, parents, and educators turned out for the popular community event, which is free and open to the public. This year’s theme was: “How we use science, [...]

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On the Right Track for Tropical Clouds
Nov 27, 2014 [ Research Highlights ]       
Researchers at Pacific Northwest National Laboratory and collaborators are hot on the trail of a large and lumbering atmospheric wave. Originating in the tropics, the intra-seasonal force wields influence on weather patterns around the world. Using high-resolution regional modeling along with field data, the scientists found that the frequency of the wave’s shallow-to-deep convective cloud [...]

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Double Bonus: Win-Win for Atmospheric Particles
Nov 18, 2014 [ Research Highlights ]       
It’s a slam dunk for scientists measuring atmospheric particle properties. Typically calculated from their chemical composition and size distribution data, the larger particles often escape characterization. Scientists at Pacific Northwest National Laboratory and the University of Colorado developed a new method that simultaneously connects two critical properties: real refractive index, a measure of how much [...]

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Observing Warm Clouds in 3D Using ARM Scanning Cloud Radars and a Novel Ensemble Method
Nov 05, 2014 [ Research Highlights ]       
Boundary-layer clouds make a significant contribution to the planetary albedo and thus are fundamentally important to the Earth’s radiation budget. Due to their complex turbulent structures, coupled with a strong susceptibility to aerosol, they remain a key source of uncertainty in climate projections. While Atmospheric Radiation Measurement Climate Research Facility (ARM)’s long-term observations from vertically [...]

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