ARM User Facility

?? Reminder: Abbreviated Proposals Due Tomorrow! ?? Planning to propose for the ARM ArcticShark uncrewed aerial system (UAS) deployment in FY2025? The deadline for abbreviated proposals is tomorrow, March 21! Don’t miss this opportunity to advance atmospheric research at Bankhead National Forest with ArcticShark’s cutting-edge capabilities! ?? Learn more & submit: https://bit.ly/4kcH5zm ?? Photo by Jason Tomlinson, Pacific Northwest National Laboratory

Ever wondered how tiny airborne particles respond to changes in humidity? The humidified tandem differential mobility analyzer (HTDMA)—an instrument in ARM's Aerosol Observing System—helps scientists understand just that! The HTDMA uses two differential mobility analyzers (DMAs) and a humidification system to make its measurements. ?? How it works: ?? The first DMA selects dry aerosol particles of a specific size. ?? These particles are then exposed to high relative humidity in the humidification system. ?? The second (humidified) DMA measures how much the particles grow (if at all) due to humidity. ?? A condensation particle counter tracks the number of these humidified particles of varying sizes, from which a size distribution is derived. Hear from HTDMA lead instrument mentor Janek Uin of Brookhaven National Laboratory, and learn more on our website: https://bit.ly/3DPk5pM

??New Data Available!?? An enhanced version of ARM’s Quality-Controlled Eddy Correlation Flux Measurement (QCECOR) value-added product has been developed, offering both new and reprocessed data. QCECOR is designed to improve the surface turbulence fluxes from eddy correlation flux measurement systems (ECORs, like the one pictured here) by applying eddy correlation corrections, determining quality-controlled energy fluxes from the corrected ECOR fluxes, and performing stringent quality control checks. ?? Access these #ARMData and details now at https://bit.ly/43RR6vY ??: An eddy correlation flux measurement system is pictured as part of the Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Gothic, Colorado. Photo by Nathan Bilow.

Happy Pi Day! ?? Let's celebrate not only this amazing number (3.14159...) and delicious dessert ??, but also pi's crucial role in atmospheric research. Hear from members of the ARM community on how pi is helping advance our understanding of the atmosphere. ???? #PiDay

We’ve given ARM.gov a fresh new look! ?? Explore our updated website to easily find information on how you can become an ARM user and access all available #ARMData. Check it out now ?? ARM.gov and let us know what you think!

Meet Argonne National Laboratory's Evan Keeler, lead instrument mentor for ARM’s meteorological automatic weather station (MAWS)! The MAWS provides critical surface meteorological data for radiosonde launches. It also serves as a second source of basic surface meteorological (MET) data in conjunction with the MET system. The MAWS delivers precise, 1-minute averages of humidity, temperature, pressure, and wind speed and direction. Visit our website to learn more about the MAWS: https://bit.ly/40gE5sB #ARMData

New data from the Tethered Balloon System (TBS) Merged value-added product (TBSMERGED VAP) are available from flights at the ARM User Facility's Southern Great Plains (#ARMSGP) Central Facility near Lamont, Oklahoma. This product combines TBS instrument data and ground-based ceilometer measurements to facilitate the examination of cloud-base and boundary-layer heights while making it easier to access and use measurements from ARM TBS missions. ?? Access the data and details now at: https://bit.ly/43FFSdY ?? ARM's TBS is pictured during a flight at the Southern Great Plains atmospheric observatory. Photo by Brent Peterson, Sandia National Laboratories

???? New Career Opportunities Available in Atmospheric Science! ???? The University of Colorado Boulder's Department of Atmospheric and Oceanic Sciences has two open positions for postdoctoral researchers. Successful candidates will work on a project to better understand the sensitivity and coupling of the Arctic's cryosphere to clouds and aerosols in the region. Learn how to apply for these positions, and view other current job openings on ARM's Careers page: https://bit.ly/41TldBP

With support from the U.S. Forest Service, which is hosting the Bankhead National Forest (#ARMBNF) atmospheric observatory in northern Alabama, ARM has erected a 140-foot (42.7-meter) tower near the observatory’s main site. Instruments on the tower will sample a variety of properties below, within, and above the forest ????canopy. Several instruments are now up on the tower, including multi-level meteorological instrumentation, infrared thermometers, and photosynthetically active radiation sensors. Learn more about the tower and other scientific activities happening at #ARMBNF at https://bit.ly/3XwTnJc ??: Josh Howie, Pacific Northwest National Laboratory

As we turn the page on another chapter of ARM’s history, we say a heartfelt thank you to Dr. Jennifer (Jen) Delamere (left) for her dedication as the ARM User Executive Committee (UEC) Chair. From navigating the ever-evolving landscape of atmospheric research, to championing the voices of ARM users, Jen’s leadership has been invaluable. Her passion for science has left a lasting mark. As she passes the torch to Dr. Michael (Mike) Jensen (right), we know ARM’s UEC future is in great hands. Read Delamere's departure message on our website: https://bit.ly/4hcCXMR Image Caption: Incoming UEC Chair Dr. Michael Jensen (right) and outgoing UEC Chair Dr. Jennifer Delamere catch up at the ARM booth at the 2024 American Geophysical Union (AGU) Annual Meeting in Washington, D.C. ARM photo.