ARM

Tag: CACTI

  • New Merged Product Integrates G-1 Flight Data

    Aerosol concentration data from the G-1 ultrafine condensation particle counter are shown for an approximately three-hour flight on December 8, 2018, near Córdoba, Argentina, during the CACTI campaign. Image is from Krista Gaustad, Pacific Northwest National Laboratory. From 2010 until its final science mission in 2018, the Gulfstream-159 (G-1) aircraft served as the Atmospheric Radiation…

  • 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…

  • 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…

  • Micropulse Lidar Cloud Mask Machine Learning VAP Now In Production

    This sample quicklook plot from the Southern Great Plains atmospheric observatory shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud mask from the MPLCMASKML value-added product for January 1, 2015. In addition, the plot contains the machine learning model’s confidence in its prediction, and cloud base and cloud…

  • ARM Rolls Out New Products for Determining Boundary-Layer Height

    Plots from top to bottom show micropulse lidar (MPL) backscatter; ceilometer (CEIL) backscatter; Doppler lidar (DL) vertical air motion variance; and estimates of planetary boundary-layer height (PBLHT) derived from MPL, CEIL, DL, and sonde measurements at ARM’s Southern Great Plains Central Facility on June 28, 2017. The structure and depth of the planetary boundary layer…

  • LASSO-CACTI Beta Release Available

    Editor’s note: William Gustafson, principal investigator for the Large-Eddy Simulation (LES) ARM Symbiotic Simulation and Observation (LASSO) activity, sent in this update. This is a rendering of the simulated radar reflectivity over the ARM Mobile Facility site during CACTI as viewed from the southwest at 19 UTC (Coordinated Universal Time) on January 29, 2019. The…

  • 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…

  • 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 Best Estimate Data Now Available for CACTI, COMBLE Campaigns

    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. ARMBE data sets are now available for the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign and the Cold-Air Outbreaks in the Marine Boundary Layer Experiment…