ARM

Tag: SGP

  • Improved Broadband Radiation Data Quality Files Available From Southern Great Plains 

    A broadband radiometer station at ARM’s Southern Great Plains Central Facility near Lamont, Oklahoma, measures broadband solar (shortwave) and infrared (longwave) radiation. Data from this station have been processed as part of a new release for the Data Quality Assessment for ARM Radiation Data (QCRAD) product. The Atmospheric Radiation Measurement (ARM) user facility processes yearly…

  • Satellite-Aligned Version of Ka-Band ARM Zenith Radar Product Now Available

    The top image shows best-estimate reflectivity from the Ka-Band ARM Zenith Radar Active Remote Sensing of CLouds (KAZRARSCL) product for a sample day at the Southern Great Plains atmospheric observatory. The middle image provides the KAZRARSCL best-estimate reflectivity after statistical alignment with CloudSat. The bottom image shows the CloudSat reflectivity offset that was applied at…

  • ARM Best Estimate Data Sets Updated for 2 ARM Observatories

    The plots show ARMBEATM relative humidity (top) and surface precipitation (bottom) from May to October 2020 at ARM’s Southern Great Plains (SGP) atmospheric observatory. 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. The ARM Best…

  • New Aerosol Hygroscopicity Kappa Data Released for 3 ARM Sites

    Sample CCNSMPSKAPPA plots from the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign show kappa values within critical diameter-supersaturation field space, top, and a time series of kappa, bottom, on November 15, 2018. Hygroscopicity is the ability of a particle to take up moisture from the environment and is important for understanding the formation…

  • 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…

  • 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…

  • 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…

  • Evaluate New Cloud Condensation Nuclei Vertical Profile Data Product

    This sample plot from a day at ARM’s Southern Great Plains atmospheric observatory shows the retrieved number concentration of cloud condensation nuclei at 0.4% supersaturation. A new value-added product (VAP) provides the vertical distribution of cloud condensation nuclei (CCN) number concentrations for better representation of aerosol indirect effects in climate models. The Retrieved Number concentration…