ARM

Category: Data Announcements

  • First Routine Ice-Nucleating Particle Data Available From ARM Sites in Alaska, Oklahoma

    The ice nucleation spectrometer, seen here at ARM’s Southern Great Plains atmospheric observatory, measures the number concentration of ice-nucleating particles. Photo is by Chris Martin, ARM. The Atmospheric Radiation Measurement (ARM) user facility now provides routine data sets on ice-nucleating particles (INPs) from the third ARM Mobile Facility (AMF3) at Oliktok Point, Alaska, and from…

  • Access New Ice-Nucleating Particle Data From Eastern North Atlantic Campaign

    The Portable Ice Nucleation Experiment (PINE) chamber operated from October 2020 to March 2021 as part of a field campaign at ARM’s Eastern North Atlantic (ENA) atmospheric observatory. Photo is by Larissa Lacher, Karlsruhe Institute of Technology. Only a subset of atmospheric particles, known as ice-nucleating particles (INPs), can initiate ice formation in the atmosphere.…

  • Full ACE-ENA Cloud Droplet Size Distribution Data Set Available

    This sample plot shows the cloud droplet size distribution in time for one research flight on July 18, 2017, as measured by the holographic detector of clouds (HOLODEC) during the Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) campaign. A fully processed data product providing cloud droplet size distribution by aircraft measurements is…

  • Companion Data Sets Key In on Eastern North Atlantic Doppler Lidar

    This Doppler lidar operates at ARM’s Eastern North Atlantic atmospheric observatory. Doppler lidars record raw backscatter and mean Doppler velocity. Photo is by Bruno Cunha, ARM. Two new Doppler lidar principal investigator data sets are available from the Atmospheric Radiation Measurement (ARM) user facility’s Eastern North Atlantic (ENA) atmospheric observatory. Doppler lidars, which record backscatter…

  • New Best-Estimate Cloud Condensation Nuclei Data Product Available

    A new principal investigator data set for ARM’s Southern Great Plains atmospheric observatory incorporates measurements from several instruments within the Aerosol Observing System (AOS). The AOS is ARM’s primary platform for collecting aerosol measurements at Earth’s surface. A new principal investigator data set contains about five years of best-estimate cloud condensation nuclei (CCN) spectra from…

  • New Cloud Microphysics VAP Evaluation Data Available for 3 ARM Sites

    Sample plots are from the Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) near Andenes, Norway, and show the primary fields from MICROBASEKAPLUS (liquid water content, liquid effective radius, ice water content, ice effective radius) on May 25, 2020. Cloud microphysical properties affect cloud radiative heating, precipitation formation, and aerosol-cloud interactions, among other important…

  • Convective Cell Tracking Database Now Available for CACTI Campaign

    A new database describes the properties of individually tracked convective cells during the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign. The Atmospheric Radiation Measurement (ARM) user facility conducted the CACTI campaign in 2018 and 2019 in Argentina’s Sierras de Córdoba mountain range. Using data from the second-generation C-Band Scanning ARM Precipitation Radar (CSAPR2)…

  • ARM Finishes Radiometer Upgrades; Related Data Product Updates Underway

    Measurements from the multifilter rotating shadowband radiometer (MFRSR), seen here at ARM’s Eastern North Atlantic atmospheric observatory, allow users to infer the atmosphere’s aerosol optical depth at each wavelength. ARM is updating data products to accommodate the addition of a new channel to its MFRSRs. In fiscal year 2021, the Atmospheric Radiation Measurement (ARM) user…

  • Aerosol Chemical Speciation Monitor VAP Moves to Production

    This sample plot from ARM’s TRacking Aerosol Convection interactions ExpeRiment (TRACER) shows a selection of aerosol mass or volume concentrations and the corresponding mass or volume concentrations corrected for composition-dependent collection efficiency (CDCE). Production data are now available from a value-added product (VAP) that corrects aerosol chemical speciation monitor (ACSM) data for non-unity particle detection.…

  • New Aerosol Data Product Released From HI-SCALE Campaign

    Sample plots show the time series (upper) and averaged size distributions (lower) for aerosols measured over the Southern Great Plains atmospheric observatory on one research flight. BEASD refers to the best-estimate aerosol size distribution. Aircraft altitude is traced on the upper panel with a black dashed line (mark log scale). “Straight and level” flight legs…