ARM

Category: Data Announcements

  • 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…

  • Updated Microwave Radiometer Retrieval Product Available for MOSAiC

    The Microwave Radiometer Retrievals (MWRRET) value-added product retrieves column precipitable water vapor and liquid water path from ARM’s 2-channel microwave radiometers. New files from the Microwave Radiometer Retrievals value-added product (MWRRET VAP) are now available for the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. This release is more complete than the…

  • ARM Instruments Detect Pressure Wave From Tongan Volcano Eruption

    The plot shows the atmospheric pressure perturbation from the Tongan volcano eruption as recorded at five ARM sites (from top to bottom): the Eastern North Atlantic atmospheric observatory; the ARM Mobile Facility site in La Porte, Texas (TRACER field campaign); the Southern Great Plains site near Byron, Oklahoma; the ARM Mobile Facility site in Gothic,…

  • Updated ARM Best Estimate Data Available for Eastern North Atlantic

    Figure 1 shows ARMBEATM relative humidity (top) and surface precipitation (bottom) from ARM’s Eastern North Atlantic (ENA) atmospheric observatory from January through April 2020. The Atmospheric Radiation Measurement (ARM) user facility provides tailored datastreams known as ARM Best Estimate (ARMBE) data products for use in the evaluation of global earth system models. Two ARMBE data…