ARM

Tag: MOSAiC

  • Lagrangian Large-Scale Forcing Data Released for MOSAiC

    The figure provides a time series of vertical velocity (top), horizontal temperature advection (middle), and horizontal moisture advection (bottom) produced by ARMLAGTRAJ for the MOSAiC expedition from November 11 to 21, 2019. Figure is from Cheng Tao, Lawrence Livermore National Laboratory. A new Lagrangian trajectory-based large-scale forcing data product from the Atmospheric Radiation Measurement (ARM)…

  • MOSAiC Doppler Lidar Motion Correction VAPs Now in Production

    The location of ARM’s Doppler lidar on the R/V Polarstern during the MOSAiC expedition is indicated in this ARM file photo. Two value-added products (VAPs) specifically designed for the 2019–2020 Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition recently moved from evaluation to production. The Doppler Lidar Motion Correction (DLMC) VAP applies…

  • Cloud Type Classification Product Released for MOSAiC, TRACER, and SAIL Campaigns

    Time-height displays show reflectivity (top) and cloud types (bottom) on June 26, 2022, during the SAIL campaign. Plots are created by the Cloud Type Classification (CLDTYPE) value-added product quicklook code. The Cloud Type Classification value-added product (CLDTYPE VAP) is now available for the following three field campaigns: the 2019–2020 Multidisciplinary Drifting Observatory for the Study…

  • Characterized and Corrected Radar Data Available for MOSAiC Expedition

    From top to bottom, the figure shows the Marine W-Band ARM Cloud Radar (MWACR) raw reflectivity, MWACR corrected reflectivity, and Ka-Band ARM Zenith Radar general mode (KAZR GE) reflectivity for January 2, 2020, during the MOSAiC expedition. ARM staff applied a reflectivity offset to the MWACR data to bring them in line with the KAZR…

  • 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 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…

  • Wind Profiles Derived From Motion-Corrected MOSAiC Lidar Data

    Using this example of a wind profile scan on a tilted surface, winds are retrieved at height z by interpolating the radial velocities in each beam to height z and then applying the standard wind retrieval technique to the interpolated data. A new value-added product (VAP) developed specifically for the Multidisciplinary Drifting Observatory for the…

  • 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 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 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…