ARM

Tag: ENA

  • 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 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…

  • 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…

  • 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…

  • Aerosol Optical Depth Data Updated for Azores, Macquarie Island

    Measurements from the multifilter rotating shadowband radiometer, seen here at ARM’s Eastern North Atlantic atmospheric observatory, allow users to infer the atmosphere’s aerosol optical depth at each wavelength. Aerosol optical depth (AOD) is the measure of the total aerosol burden in a vertical column of the atmosphere. The AOD value-added product (VAP) has been running…

  • 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…

  • New Microwave Radiometer Retrieval Data Available for Eastern North Atlantic

    This Microwave Radiometer Retrievals version 2 (MWRRETv2) quicklook image is from July 18, 2020, at the Eastern North Atlantic atmospheric observatory. From top to bottom, panels show observed brightness temperatures at 23.8 (blue), 30 (red), and 89 GHz (green); physically (red and blue) and statistically (green) retrieved precipitable water vapor; physically (red and blue) and…