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Micropulse Lidar Cloud Mask Machine Learning VAP Released for 2 ARM Campaigns
This sample quicklook plot from the TRACER ARM Mobile Facility site shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud mask from the MPLCMASKML value-added product for September 6, 2022. In addition, the plot contains the machine learning model’s confidence in its prediction, as well as cloud base…
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Updated: New Cloud Radar Products Available From COMBLE Campaign
Editor’s note (July 20, 2023): A new KASACRGRIDRHI evaluation release for COMBLE, which uses b1-level calibrated HSRHI data as input, is now available. The output is a single c1-level netCDF file containing calibrated radar moments remapped onto a 2D Cartesian grid. Access the data from the ARM Data Center. To cite the c1-level data, please…
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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…
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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…
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New Micropulse Lidar Cloud Mask Machine Learning VAP Released
This sample MPLCMASKML plot from the Southern Great Plains atmospheric observatory shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud masks from the MPLCMASKML and MPLCMASK value-added products for December 24, 2017. The strength of the machine learning approach is apparent on this day when moderate aerosol loading…
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Three New Value-Added Products Available for MOSAiC Expedition
ARM instruments, including radars and aerosol instruments, operated on an icebreaker in the central Arctic during the 2019–2020 Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. Photo is by Tercio Silva, then with Hamelmann Communications. The Atmospheric Radiation Measurement (ARM) user facility released three new value-added products (VAPs) from the 2019–2020 Multidisciplinary…
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REVISED: Additional Ka-Band ARM Zenith Radar Product Releases Now Available
Editor’s note (September 1, 2021): Ka-Band ARM Zenith Radar Active Remote Sensing of CLouds (KAZRARSCL) data from January through June 2021 are now available for the Southern Great Plains and North Slope of Alaska atmospheric observatories. The data announcement below was originally published June 28, 2021. These plots illustrate the KAZRARSCL product for a sample…
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Micropulse Lidar Cloud Mask VAP Data Revised for High-Latitude Sites
Data reprocessed with a revised version of the Micropulse Lidar Cloud Mask value-added product (MPLCMASK VAP) are now available for four high-latitude sites. This reprocessing also includes periods of data previously listed as missing. The durations of missing data varied from several minutes to several hours and occurred periodically during the winter months. Affected fields…
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Ka-Band ARM Zenith Radar Product Resumes for 2 Sites
This set of plots illustrates the KAZRARSCL product. From top to bottom are time-versus-height plots of cloud boundaries, best-estimate hydrometeor reflectivity, and dealiased mean Doppler velocity for a sample date at Oliktok Point, Alaska. The Atmospheric Radiation Measurement (ARM) user facility has resumed production of the Ka-Band ARM Zenith Radar Active Remote Sensing of CLouds…
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ARM Instrument Mentor Updates: Here’s to New Adventures
Two longtime colleagues plot their retirement journeys, a new mentor joins the fold, and another’s lead mentorship becomes official Stephen Springston, right, a Brookhaven National Laboratory chemist and soon-to-be-retiree, poses with longtime lab colleague Tom Watson, a chemist who retired earlier this year. Both have been instrument mentors for ARM. In the fall of 2020,…