News Center

Surface Meteorological Data Overhaul Completed
Aug 28, 2015 [ Data Announcements ]       
In an effort to provide data product consistency, the task of reprocessing historical surface meteorology data was recently completed. As the ARM Climate Research Facility grew both in size and scope, it became important to create homogenous data sets to ease navigation for users, while providing a straightforward approach for ARM infrastructure staff to maintain [...]

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Doppler Lidar Profile VAPs Now Available
Aug 27, 2015 [ Data Announcements ]       
The ARM Facility currently operates several scanning coherent Doppler lidar systems at various sites around the globe. These instruments operate in the near infrared and provide measurements of radial velocity, attenuated aerosol backscatter, and signal-to-noise ratio. Previously shared with the ARM user community as an evaluation product, these data are now in production and available [...]

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Large-Scale Forcing Data Collected During DYNAMO/AMIE Now Available for Evaluation
Aug 25, 2015 [ Data Announcements ]       
Constrained variational analysis of forcing data taken from the northern sounding array are now available for the Dynamics of the Madden-Julian Oscillation (DYNAMO) and the ARM Madden-Julian Oscillation [MJO] Investigation Experiment [AMIE] on Gan Island as an ARM evaluation data product as part of the Single Column Model (SCM)-Forcing Data, Cloud Microphysical Properties and Radiative [...]

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Partnerships Put the “Go” in the GoAmazon 2014/15 Campaign
Aug 24, 2015 [ Feature Stories and Releases ]       
Combining U.S. and Brazilian agencies and institutions and other international collaborators, the GoAmazon 2014/15 campaign will yield an unprecedented data set climate scientists can use to understand how aerosol and cloud life cycles in an unspoiled area are influenced by pollution emanating from a large tropical city.

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UPDATE: ARM Best Estimate Data Sets From MC3E Now in Production
Aug 21, 2015 [ Data Announcements ]       
EDITOR'S NOTE: The ARM Best Estimate Data Sets have been moved from evaluation to production at the ARM Data Archive. To view the new data, visit the ARMBE2DGRID and ARMBESTNS VAP pages. Data sets for the ARM Best Estimate 2-Dimensional Grid (ARMBE2DGRID) and Station-based Surface (ARMBESTNS) are now available for the Midlatitude Continental Convective Clouds [...]

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Early Career Funding Opportunity
Aug 21, 2015 [ Facility News ]       
U.S. Department of Energy (DOE) national laboratory researchers and university tenure-track professors are invited to submit applications for the Early Career Research Program, sponsored by the DOE Office of Science. Applicants must have received their doctorates no earlier than 2005. For the fiscal year 2016 call, proposals to the Office of Biological and Environmental Research (BER) [...]

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Students Explore the Skies at ARM Summer Training
Aug 21, 2015 [ Events, Facility News ]       
Their heads were in the clouds, but the students at the first ARM Summer Training and Science Applications event weren't daydreaming. As the next generation of atmospheric researchers, they cut their teeth on ARM data at the National Weather Center in Norman, Oklahoma, from July 15 to 24. Their experience included visiting ARM's Southern Great [...]

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New ASR Program Manager Selected
Aug 19, 2015 [ Facility News ]       
Dr. Shaima Nasiri has been selected as the Atmospheric System Research (ASR) Program Manager, effective August 10, 2015. She shares ASR programmatic responsibilities with Ashley Williamson. "I'm honored to have the opportunity to manage such a well-respected and scientifically significant program as ASR," says Nasiri. "I think this is an exciting time for the program and [...]

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ARM Data Developers Prepare for Next Generation of ARM
Aug 18, 2015 [ Facility News ]       
About 40 ARM staff members gathered at the National Weather Center in Norman, Oklahoma, from July 14 to 16 for the ARM Climate Research Facility’s Annual Developers Meeting to discuss current activities and help facilitate a reconfiguration to better streamline ARM operations and enhance its scientific impact. Participants included representatives from ARM’s External Data Center, [...]

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Conference to Address Clouds and Precipitation in Climate Models
Aug 11, 2015 [ Events ]       
A conference focused on understanding clouds and precipitation through highly resolved process modeling and observations is being held in Berlin from February 15 to 19. Abstracts will be accepted through mid-September and will be reviewed in early October. The conference, hosted by the German Project on High Definition Clouds and Precipitation for Advancing Climate [...]

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Simulating the MJO: Everybody Into the (Cold) Pool!
Aug 11, 2015 [ Research Highlights ]       
Most general circulation models (GCMs) continue to have difficulty simulating the Madden-Julian Oscillation (MJO), the most important source of tropical precipitation variability on time scales shorter than seasons. In recent years, evidence has grown for viewing the MJO as a “moisture mode.” Moisture modes differ from other equatorial waves in that they depend explicitly on [...]

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Observed Relations Between Snowfall Microphysics and Triple-Frequency Radar Observations
Aug 05, 2015 [ Research Highlights ]       
Recent theoretical and observational studies indicated that triple-frequency measurements (e.g., combining Ku, Ka, and W band) bear the potential to derive important snowfall microphysical parameters like median mass diameter, fractal dimension, or particle habit. These observations further revealed that naturally occurring snowflakes exhibit scattering signatures that are in some cases consistent with spheroidal particle models [...]

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First Use of ARM’s New FAA-Approved Arctic Airspace
Aug 03, 2015 [ Feature Stories and Releases ]       
New area offers opportunity to test manned and unmanned aerial systems in the Arctic After gaining Federal Aviation Administration (FAA) approval, new special-use arctic airspace will be available as a tool to conduct climate and atmospheric research and address scientific questions by gathering additional data under conditions unique to the area. Called Warning Area W-220 by the [...]

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Remote Region Promotes Remote-Control Science
Aug 03, 2015 [ Feature Stories and Releases ]       
With ice and snow in the Arctic decreasing, improving understanding of atmospheric processes at high latitudes becomes an increasingly critical task for climate scientists. Researchers are using remote-controlled unmanned aerial systems in Oliktok Point, Alaska, this summer to collect hard-to-gather data with the ultimate aim of improving climate models.

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Measuring Clouds with MAGIC
Jul 31, 2015 [ Facility News ]       
The MAGIC field campaign, which was a unique effort to provide long-term data looking at clouds over the high seas, was featured in the July 1 edition of EOS Earth & Space Science News. The article highlighted the data on ocean clouds collected through MAGIC, which was a deployment of the ARM Climate Research Facility. MAGIC put [...]

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ARM Science Board Meeting
Jul 30, 2015 [ Events ]       
The ARM Science Board will be convening for their annual meeting, August 26-27 in Washington DC. They will review 17 proposals for new campaigns using the ARM Climate Research Facility. Award announcements will be made in late October 2015. The ARM Science Board is an independent body made up of eleven scientists from the climate research community. [...]

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37th Conference on Radar Meteorology
Jul 30, 2015 [ Events ]       
Interested in learning more about open source radar software or cm- and mm-wavelength radar applications? Radar scientists from the Atmospheric Radiation Measurement (ARM) Climate Research Facility will be leading workshops on those topics at the 37th Conference on Radar Meteorology. The conference will be held 14-18 September 2015 in Norman, Oklahoma, and is being sponsored by [...]

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GoAmazon2014/15 Call for Papers for Special Issue
Jul 23, 2015 [ GOAMAZON, Publications ]       
The GoAmazon2014/15 campaign will be the focus of a combined special issue, scheduled in four journals. Campaign scientists can submit their contributions using the online registration form on the journal of their choice’s website until May 31, 2018. Special issues of journals contain collections of papers on a specific topic or theme. The GoAmazon2014/15 special issue [...]

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Mission Ready
Jul 21, 2015 [ Blog, Field Notes, PECAN ]       
The past few weeks have been adventurous for the PECAN-CLAMPS team, with a burst of meteorological conditions favorable for nocturnal convection. As of June 27, there had been 14 intensive observational periods which means about 1 out of every 2 days has been devoted to a mission. That was a lot of missions considering the [...]

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Liquid Water the Key to Arctic Cloud Radiative Closure
Jul 21, 2015 [ Research Highlights ]       
Consistent with our growing understanding of Arctic liquid water clouds, it is not surprising that proper identification and characterization of cloud liquid water is important for accurately representing Arctic radiative fluxes. This conclusion is one of the primary findings resulting from the development and evaluation of a comprehensive cloud retrieval suite, called ShupeTurner, which is [...]

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A Lidar View of Clouds in Southeastern China
Jul 15, 2015 [ Research Highlights ]       
From May 2008 to December 2009, a suite of instruments, including a micropulse lidar, were installed at a site along Lake Taihu, China, located in the center of the Yangtze Delta region. This was part of an effort to characterize aerosols, clouds, and their interactions in heavily polluted southeastern China. The seasonal patterns and diurnal [...]

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ARM/ASR Joint Meeting Breakout Reports Now Available
Jul 14, 2015 [ Events, Facility News ]       
This spring, users and staff from the ARM Climate Research Facility joined with principal investigators from the Atmospheric System Research (ASR) program for the first Joint User Facility and Principal Investigators' Meeting. For those who were unable to make it, as well as attendees who want to learn more, the breakout session reports, abstracts and posters, [...]

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ARM Data Used to Evaluate Reanalysis Results
Jul 06, 2015 [ Research Highlights ]       
Atmospheric reanalysis data sets have been used for a variety of applications, such as providing forcing data for single-column and cloud resolving models (Xie et al. 2004; Kennedy et al. 2011), investigating extreme weather and climatic events (Dong et al. 2011 and 2014), and examining forecast skill. These reanalysis data sets also provide an essential [...]

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DCS Ice Cloud Microphysical Properties Derived from Aircraft Data During MC3E
Jul 06, 2015 [ Research Highlights ]       
Particle size distributions (PSDs) play an important role in the study of ice clouds because most of bulk ice cloud microphysical properties, including ice water contents (IWC), bulk density, median mass diameter (Dm), etc., are determined from the PSD measurements. Furthermore, the PSD should have a strong relationship to ice formation and growth processes, including [...]

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MBL Cloud and CCN Properties Under Coupled and Decoupled Conditions
Jul 06, 2015 [ Research Highlights ]       
Marine boundary layer (MBL) stratocumuli are turbulently mixed from the top-downward due to negative buoyancy through a combination of longwave (LW) radiative cooling and evaporative cooling at the cloud top (Wood 2012; Shin and Ha 2009). The vertical and horizontal structures of stratocumulus are strongly tied to the vertical structure of the boundary layer. The [...]

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Up, Up, and Away!
Jul 06, 2015 [ Feature Stories and Releases ]       
This summer, researchers are launching an unprecedented number of weather balloons in rural Oklahoma to collect data to help improve how weather and climate models predict the diurnal cycle of rainfall and cloud development.

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Students to Attend ARM Summer Training Event
Jul 06, 2015 [ Facility News ]       
Twenty-six students from around the world were chosen to attend the upcoming ARM Summer Training and Science Applications event. From July 15-24 at the National Weather Center in Norman, Oklahoma, the graduate and postdoctoral students gained practical and theoretical knowledge about observing and modeling aerosols, clouds, and precipitation processes. The training was sponsored by the [...]

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Call for Abstracts for AGU Fall Meeting and AMS Annual Meeting
Jul 02, 2015 [ Events ]       
The abstract submission deadlines are 5 August for the American Geophysical Union (AGU) Fall Meeting and early August for the American Meteorological Society (AMS) Annual Meeting. AGU Sessions The largest meeting in the world for Earth and space science is open for abstract submissions. The AGU Fall Meeting takes place in San Francisco, California, on 14-18 [...]

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Clearer Skies for Cloud Modeling
Jul 01, 2015 [ Facility News ]       
This May, Cyril Morcrette was awarded the L F Richardson Prize by the Royal Meteorological Society for his work in evaluating cloud forecasts. Although weather and climate models often rely on different metrics to make accurate forecasts, Morcrette created a unified methodology that can be used to evaluate cloud predictions at both scales. Data provided [...]

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Stereo Photogrammetry Reveals Substantial Drag on Cloud Thermals
Jun 25, 2015 [ Research Highlights ]       
Fast updrafts within clouds can generate hail, lightning, and tornadoes at the surface, as well as clear-air turbulence that pose hazards for aircraft aloft. Despite these important impacts of fast updrafts, there is surprisingly large uncertainty about the forces that generate these updraft speeds. For example, do these cloud updrafts experience drag? If so, what [...]

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Sticky Thermals: Evidence for a Dominant Balance Between Buoyancy and Drag in Cloud Updrafts
Jun 25, 2015 [ Research Highlights ]       
Quickly rising clouds are associated with many important phenomena, including hail, turbulence, and lightning. But, what sets the speeds of these rising clouds? In other words, what is the balance of forces giving rise to the observed cloud updraft speeds? Here, we answer this question by studying thousands of cloud thermals in a high-resolution large-eddy [...]

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Regime Analysis to Identify the Contribution of Clouds to Surface Temperature Errors in GCMs
Jun 16, 2015 [ Research Highlights ]       
Many Global Circulation Models (GCMs) exhibit a persistent bias in the 2m-temperature (T2m) over the midlatitude continents, present in weather forecasts and climate simulations. A number of hypotheses have been proposed, from deficiencies in the soil-vegetation-atmosphere energy exchange, to poorly resolved boundary-layer clouds to misrepresentations of deep convection. This paper presents a new method to [...]

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