ARM

Tag: COMBLE

  • Hydrometeor Field Spatial Statistics Derived From Radar Scans

    A new evaluation data set, Plan Position Indicator (PPI) Hydrometeor Field Statistics (PPIHYD), provides spatial statistics based on distinct (clustered) hydrometeor fields from radar scans. By leveraging information harvested from Atmospheric Radiation Measurement (ARM) user facility scanning radar measurements, statistics such as spatial moments and percentiles are calculated for radar reflectivity and Doppler spectral width…

  • Micropulse Lidar Cloud Mask Machine Learning VAP Released for 2 ARM Campaigns

    This sample quicklook plot from the TRACER ARM Mobile Facility site shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud mask from the MPLCMASKML value-added product for September 6, 2022. In addition, the plot contains the machine learning model’s confidence in its prediction, as well as cloud base…

  • New Aerosol Hygroscopicity Kappa Data Available

    Sample CCNSMPSKAPPA plots from the Surface Atmosphere Integrated Field Laboratory (SAIL) field campaign in Colorado show kappa values within critical diameter-supersaturation field space (top) and a time series of kappa (bottom) on March 15, 2022, at ARM’s Aerosol Observing System (AOS) site on Crested Butte Mountain. The CCN particle counter and SMPS operated as part…

  • Atmospheric Emitted Radiance Interferometer Product Expands to 4 ARM Campaigns

    The figure shows a time series of temperature, relative humidity, and water vapor mixing ratios retrieved from AERIoe for the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign in Argentina on February 24, 2019. The Atmospheric Emitted Radiance Interferometer Optimal Estimation value-added product (AERIoe VAP) is now available in evaluation mode for the following four field…

  • Updated: Access New Gridded Cloud Radar Product for COMBLE Campaign

    Editor’s note (July 20, 2023): A new KASACRGRIDPPI evaluation release for COMBLE, which uses b1-level calibrated PPI data as input, is now available. Output data from KASACRGRIDPPI are uncalibrated c1-level netCDF files, each comprising gridded observations for a single azimuthal scan. Surveillance scans are gridded for elevations of 0, 0.5, 1, and 2 degrees. Output…

  • Updated: New Cloud Radar Products Available From COMBLE Campaign

    Editor’s note (July 20, 2023): A new KASACRGRIDRHI evaluation release for COMBLE, which uses b1-level calibrated HSRHI data as input, is now available. The output is a single c1-level netCDF file containing calibrated radar moments remapped onto a 2D Cartesian grid. Access the data from the ARM Data Center. To cite the c1-level data, please…

  • New ARM Data Epoch Assembled From COMBLE Campaign

    In this satellite image of the Norwegian Sea on March 28, 2020, a cold-air outbreak spurs the formation of “cloud streets.” As these broken cloud decks stream southward, they evolve into cellular patterns. In red are the two instrument locations in Norway during ARM’s Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE). This event…

  • New Data Product Determines Thermodynamic Phase of Cloud Hydrometeors

    Thermodynamic cloud phase identification is important to understand many cloud processes such as ice particle production, precipitation formation, and cloud life-cycle evolution, and it is essential to improve our understanding of cloud radiative properties and the atmospheric radiative budget. Because ice particles and liquid droplets have distinct sizes, shapes, fall velocities, and refractive indexes, clouds…

  • Doppler Lidar Data Products Released for 3 ARM Campaigns

    Time-height displays show Doppler lidar data from April 14, 2020, during the Cold-Air Outbreaks in the Marine Boundary Experiment (COMBLE). The top plot indicates wind speed (color) and wind vector direction (arrows), and the bottom plot provides vertical velocity. The Atmospheric Radiation Measurement (ARM) user facility operates Doppler lidars around the globe to provide measurements…

  • Cloud Type Classification Product Released for COMBLE Campaign

    Time-height displays show reflectivity (top) and cloud types (bottom) on April 14, 2020, near Andenes, Norway, during the Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE). The Cloud Type Classification value-added product (CLDTYPE VAP) is now available for the 2019–2020 Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) deployment near Andenes, Norway. CLDTYPE…