ARM

Tag: AMF

  • 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…

  • ARM Best Estimate Data Produced for TRACER Campaign

    ARMBEATM relative humidity (top) and surface precipitation (bottom) are shown for the first 120 days of 2022 during the TRacking Aerosol Convection interactions Experiment (TRACER). 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 climate models. Two ARMBE data…

  • Radiative Flux Analysis Data Released for TRACER Campaign

    This plot shows irradiance and albedo—surface reflectivity—from the RADFLUXANAL value-added product at the main site of the TRacking Aerosol Convection interactions ExpeRiment (TRACER) from June 20 to 21, 2022. The Radiative Flux Analysis value-added product (RADFLUXANAL VAP) is now available for the 2021–2022 TRacking Aerosol Convection interactions ExpeRiment (TRACER) near Houston, Texas. RADFLUXANAL calculates clear-sky irradiance…

  • Radiosonde Parameters Calculation VAP Available

    This skew-T plot shows the pressure and temperature recorded by an ARM radiosonde launched during the TRacking Aerosol Convection interactions ExpeRiment (TRACER) on June 1, 2022, in La Porte, Texas. Red, blue, and green dots indicate different radiosonde parameters. A new value-added product (VAP) for calculating radiosonde parameters within convective cloud environments is now available…

  • ARM Best Estimate Cloud Radiation Data Released for MOSAiC

    ARMBECLDRAD cloud fraction (top) on July 20, 2020, during the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition is derived from the Ka-Band ARM Zenith Radar Active Remote Sensing of Clouds (KAZRARSCL) product (bottom). The Atmospheric Radiation Measurement (ARM) user facility provides tailored datastreams known as ARM Best Estimate (ARMBE) data products…

  • New Broadband Irradiance Data Produced for 2 ARM Sites

    This collection of radiometers at Oliktok Point, Alaska, provided continuous measurements of broadband shortwave (solar) and longwave (infrared) irradiances for downwelling components. ARM stopped collecting data at Oliktok Point in June 2021 after almost eight years. New c2-level data are available from the Data Quality Assessment for ARM Radiation Data (QCRAD) product at Oliktok Point,…

  • Large-Scale Forcing Data Released for CACTI Campaign

    The map shows the variational analysis domain (enclosed by the red circle) for the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign. The domain is centered at 64.1oW, 32oS. The first ARM Mobile Facility (AMF1) at Córdoba, Argentina, is located near the southwestern corner of the variational analysis domain. Continuous large-scale forcing data are…

  • 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…

  • New Precipitation Product Released for TRACER Campaign

    This laser disdrometer operated in Guy, Texas, during the TRacking Aerosol Convection interactions ExpeRiment (TRACER). Laser disdrometers measure drop size spectra and fall velocity of hydrometeors. A new precipitation value-added product (VAP) is now available for the 2021–2022 TRacking Aerosol Convection interactions ExpeRiment (TRACER) near Houston, Texas. The Laser Disdrometer Quantities (LDQUANTS) VAP provides quality-controlled…