ARM

Tag: RL

  • Raman Lidar Vertical Profiles Product Expands to Oliktok Point, Alaska

    Plots from top to bottom show particulate backscatter coefficient profile; particulate extinction coefficient profile; particulate depolarization ratio profile; and detected features at the ARM site in Oliktok Point, Alaska, on July 18, 2018. In the bottom plot, HOI refers to horizontally oriented ice crystals. Data at Oliktok Point, Alaska, are now available from the Raman…

  • Cloud Condensation Nuclei Vertical Profile Data Product Updated

    This sample plot from ARM’s Southern Great Plains atmospheric observatory shows the retrieved number concentration of cloud condensation nuclei at 0.4% supersaturation for September 22, 2016. A new version of the Retrieved Number concentration of Cloud Condensation Nuclei value-added product (RNCCN VAP) is now available for evaluation. This VAP provides the vertical distribution of cloud…

  • New Data Available From Updated Raman Lidar Value-Added Product

    This figure provides sample plots from ARM’s Southern Great Plains Central Facility Raman lidar on May 25, 2020. The top plot shows a time-height cross-section of the merged photon counting rates for the narrow-field-of-view elastic (355 nm) channel. The middle plot shows cloud base height estimates, and the bottom plot shows the so-called “merge flag.”…

  • Newly Revised Value-Added Products Available for Raman Lidar

    Sample time-height cross-sections show a) water vapor mixing ratio, b) temperature, and c) aerosol backscatter coefficient from the Southern Great Plains Raman lidar on July 4, 2018. A suite of newly revised value-added products (VAPs) is now available for Raman lidars operated by the Atmospheric Radiation Measurement (ARM) user facility. The suite consists of three…

  • New Aerosol Best-Estimate Data Available as Value-Added Product

    Quicklook plots of monthly time series are generated for column AOD, vertical profiles up to 4 km of SSA and g, and for the corresponding RH profile. The optical properties are shown for the nominal green wavelength of 500 nm. The Aerosol Best Estimate (ABE) value-added product (VAP) provides best-estimate time series of total column…

  • Raman Lidar Data Product Suite Provides Best-Estimate Data

    Example of plots produced by the Raman lidar best-estimate VAP for April 3, 2011. Panels (a), (b), and (c) show time-height cross-sections of relative humidity, aerosol backscatter coefficient, and aerosol depolarization. A time series of aerosol optical depth is shown in panel (d). Click to view full-size image. Science data products derived from the Raman…