ARM

Tag: NSA

  • Explosive Origins of ‘Secondary’ Ice—and Snow

    Definitive, real-world evidence for “freezing fragmentation” of drizzle as a major source of ice in slightly supercooled clouds has important implications for forecasting weather and climate Data from ARM’s North Slope of Alaska atmospheric observatory indicate that shattering drizzle droplets play a major role in the formation of “secondary” ice in mixed-phase clouds. The results…

  • BAMS: Two More Hits for ARM Data

    Improving earth system models is at the heart of a pair of new studies Data from ARM’s Southern Great Plains atmospheric observatory, above, informed some of a metrics and diagnostics package of earth system models outlined in a July 2020 paper. Hot streaks? Not only athletes have them. Institutions do too. A pair of recent…

  • Scanning ARM Cloud Radar-Velocity Azimuth Display Product Released to Production

    Horizontal wind speed and direction at cloud level, from SACR-ADV-VAD, are shown for the first seven days of August 2012 at ARM’s Southern Great Plains Central Facility. The Scanning ARM Cloud Radar-Advanced-Velocity Azimuth Display (SACR-ADV-VAD) value-added product, which provides profiles of horizontal wind estimates at cloud level, has moved to production. SACR-ADV-VAD uses radial mean…

  • Extended ARM Best Estimate Data Sets Available for North Slope of Alaska

    The images show ARMBEATM 2-meter temperature (left, unit: K) and 10-meter zonal wind (right, unit: m/s) for ARM’s North Slope of Alaska (NSA) atmospheric observatory in 2017. 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. Two…

  • New Radiation Data Quality (QCRAD) VAP Release Now Available

    A broadband radiometer station at ARM’s Southern Great Plains Central Facility near Lamont, Oklahoma, measures broadband solar (shortwave) and infrared (longwave) radiation. Data from this station have been processed as part of a new release for the Data Quality Assessment for ARM Radiation Data (QCRAD) value-added product. A new level 2 (c2/s2) release for the…

  • New Microwave Radiometer Retrievals VAP Data Available for Several ARM Campaigns and Sites

    Microwave radiometers, such as this one at ARM’s North Slope of Alaska atmospheric observatory, provide time-series measurements of column-integrated amounts of water vapor and liquid water. The Microwave Radiometer Retrievals (MWRRET) value-added product (VAP) has been processed for the following Atmospheric Radiation Measurement (ARM) user facility field campaigns and measurement sites: the ARM North Slope…

  • Aerosol Optical Properties VAP Now Available

    The first plot shows the aerosol extensive property of light absorption for nominally “red,” “green,” and “blue” light over a two-week period at Ascension Island. The second plot shows the wavelength dependence of aerosol absorption—an intensive property—which describes the nature rather than the abundance of the absorption. The Aerosol Optical Properties (AOP) value-added product (VAP)…

  • New Radiative Flux Analysis VAP Now Operational

    Radiative flux analysis data of irradiance and cloud fraction are shown here for the Southern Great Plains. The Radiative Flux Analysis VAP is an implementation of a series of algorithms that estimate clear-sky broadband surface irradiances, cloud fraction, optical depth, cloud transmissivity, and cloud radiative effects. This VAP is an updated version of the Shortwave…

  • AmeriFlux and Methane Evaluation VAP Now Available for Barrow Data

    This image shows methane fluxes (nmol m-2 s-1) versus day of the year for early 2014.Greenhouse gases (GHGs) are suspected to be key drivers of global climate change. As Arctic permafrost melts, it unlocks stored carbon, which may contribute to large increases in the atmospheric mixing ratios of these gases. Understanding the rates and controlling…

  • New MICROARSCL Evaluation Data Released for Barrow, Alaska

    Four of the roughly 30 variables provided by MICROARSCL are shown here for February 13, 2012, in Barrow, Alaska. A new evaluation release of 18 months of data from Barrow, Alaska, provides the first KAZR-based Micro-Active Remote Sensing of Clouds (MICROARSCL) data from this North Slope of Alaska (NSA) site. The addition of the KAZR…