ARM

Tag: SGP

  • 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…

  • New Precipitation Value-Added Product Released for Video Disdrometers

    Histograms of quantities associated with convective (red) and stratiform (blue) drop size distributions (DSDs) in terms of normalized DSD intercept parameter Nw (a), liquid water content LWC versus rainfall rate R (b), and median drop size D0 versus S-band Reflectivity Factor Z (c). Density is shown on the color scale. Information is adapted from Wang et al.…

  • New Micropulse Lidar Cloud Mask Machine Learning VAP Released

    This sample MPLCMASKML plot from the Southern Great Plains atmospheric observatory shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud masks from the MPLCMASKML and MPLCMASK value-added products for December 24, 2017. The strength of the machine learning approach is apparent on this day when moderate aerosol loading…

  • Aerosol Optical Depth Product Generates New Data

    The colors represent aerosol optical depths measured at five different wavelengths with the multifilter rotating shadowband radiometer on June 19, 2019, at Oliktok Point, Alaska. New data are now available from the Aerosol Optical Depth value-added product derived from multifilter rotating shadowband radiometer measurements (AOD-MFRSR VAP). AOD is the measure of the total aerosol burden…

  • New Data Available From Updated Raman Lidar Value-Added Product

    This figure provides sample plots from ARM’s Southern Great Plains Central Facility Raman lidar on May 25, 2020. The top plot shows a time-height cross-section of the merged photon counting rates for the narrow-field-of-view elastic (355 nm) channel. The middle plot shows cloud base height estimates, and the bottom plot shows the so-called “merge flag.”…

  • Cloud Droplet Number Concentration Product Updated

    This sample plot from the Southern Great Plains Central Facility shows the droplet number concentration for October 30, 2019. New data are available from the Droplet Number Concentration value-added product (NDROP VAP), which has been updated to use additional inputs. This will allow NDROP to be available quicker with better retrievals and to be applied…