ARM

Tag: NSA

  • Surface Spectral Albedo Product Updated

    This example quicklook from the SURFSPECALB value-added product shows the estimated spectral albedo for each of the seven multifilter radiometer channels for the 10-meter tower at ARM’s Southern Great Plains atmospheric observatory on May 1, 2023. In fiscal year 2021, the Atmospheric Radiation Measurement (ARM) user facility added a seventh channel to its multifilter rotating shadowband…

  • Black Carbon Data Product Available for Use

    Sample plots show black carbon mass concentrations and size distributions from February 16, 2020, at ARM’s North Slope of Alaska (NSA) atmospheric observatory. On this day, smoke from biomass burning approached the NSA. The Atmospheric Radiation Measurement (ARM) user facility developed a data product for scientists to measure the black carbon (BC) mass loadings in…

  • New Microwave Radiometer Retrieval Data Now Available

    This Microwave Radiometer Retrievals (MWRRET) quicklook image provides information from the TRacking Aerosol Convection interactions ExpeRiment (TRACER) near Houston, Texas, on June 22, 2022. The image shows, from top to bottom, observed brightness temperatures at 23.8 GHz (blue) and 31.4 GHz (red); retrieved precipitable water vapor from the physical method (blue) and statistical method (green);…

  • New and Improved ARM Broadband Radiation Data Now Available

    Radiometers operate in mountainous terrain as part of the Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Crested Butte, Colorado. The campaign took place from September 2021 to June 2023. Photo is by David Chu, Los Alamos National Laboratory. The Atmospheric Radiation Measurement (ARM) user facility’s longtime recommended datastream for broadband surface irradiance measurements is…

  • 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…

  • Cloud Type Classification Product Expands to North Slope of Alaska

    Time-height displays show reflectivity (top), cloud types (middle), and precipitation rate (bottom) on September 24, 2021, at ARM’s North Slope of Alaska atmospheric observatory. The Cloud Type Classification value-added product (CLDTYPE VAP) is now available for the Atmospheric Radiation Measurement (ARM) user facility’s North Slope of Alaska (NSA) atmospheric observatory. CLDTYPE provides an automated cloud…

  • 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…

  • New Precipitation Radar Data Products Released for 2 ARM Observatories

    Plots from the North Slope of Alaska data set show, clockwise from top left, hydrometeor classification (gate ID), reflectivity, cross-correlation coefficient, and velocity texture (mean Doppler velocity) generated from version 2 of the CMAC value-added product for November 23, 2019. The top left plot shows IDs of ground clutter, snow, and multitrip. Gate ID—the classification…

  • Improved Microwave Radiometer Retrieval Data Produced for 2 ARM Sites

    This Microwave Radiometer Retrievals (MWRRET) quicklook image provides information from ARM’s Southern Great Plains Central Facility on July 2, 2021. The image shows, from top to bottom, observed brightness temperatures at 23.8 GHz (blue) and 31.4 GHz (red); retrieved precipitable water vapor from the physical method (blue) and statistical method (green); and retrieved liquid water…

  • 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…