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New Precipitation Value-Added Product Released for Video Disdrometers
Histograms of quantities associated with convective (red) and stratiform (blue) drop size distributions (DSDs) in terms of normalized DSD intercept parameter Nw (a), liquid water content LWC versus rainfall rate R (b), and median drop size D0 versus S-band Reflectivity Factor Z (c). Density is shown on the color scale. Information is adapted from Wang et al.…
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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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3-Dimensional Cloud Positions Produced for CACTI Campaign
The figure shows sample Point Cloud of Cloud Points (PCCP) data for January 29, 2019, during the CACTI field campaign. The upper panel shows the distribution of the retrieved cloud points by time and height. A snapshot from the reference camera (32.1185oS, 64.7237oW) and the cloud point positions with respect to the base location appear…
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Precipitation Radar Data Product Released for CACTI Campaign
A new CACTI data product will help users analyze information from the deployment of the second-generation C-Band Scanning ARM Precipitation Radar (CSAPR2) in Argentina. Photo is by Janek Uin, Brookhaven National Laboratory. The Corrected Moments in Antenna Coordinates Version 2 (CMAC2) value-added product (VAP) has been updated to work with the second-generation C-Band Scanning ARM…
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Annual Scientific Meetings Give Wide View of CACTI Research
ARM campaign looking at convective cloud life cycle took place in the mountains of Argentina This ARM Mobile Facility collected data during the 2018–2019 Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign in Argentina. CACTI involved the first field deployment of the second-generation C-Band Scanning ARM Precipitation Radar (sphere in the center). Photo is…
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Value-Added Product Delivers 3D Cloud Positions Based on Stereo Photographs
The figure presents PCCP VAP data from the Southern Great Plains E45 site (Tonkawa, Oklahoma) on March 24, 2020. The upper panel displays the distribution of the reconstructed cloud points by time and height. The colors represent the count of the detected points in the corresponding bin. The bottom left panel is a picture from…
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New Cloud Radar Products Available for CACTI Campaign
This shows the XSACRGRIDRHI CACTI product with two-dimensional horizontal-distance-versus-vertical-height gridded radar reflectivity when the azimuth angle is 90 degrees (east-to-west scan). The Atmospheric Radiation Measurement (ARM) user facility released new cloud radar value-added products (VAPs) from the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign. With these VAPs, scientists can more easily use corrected…
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Reprocessed Cloud Radar Spectra Data Released for CACTI Campaign
The top right graphic is a time-versus-height image of KAZR reflectivity from the CACTI field campaign during an hourlong period on January 24, 2019. At top left, the spectrogram in height is associated with the time indicated by the dashed blue vertical line in the reflectivity image, 3.47 minutes past the hour. At bottom right,…
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Storm Animations, CACTI-Style
New visualizations turn data into dramatic 3-dimensional images of evolving thunderstorms ARM’s main observatory for the 2018–2019 Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign was between two mountain ridgetops in Argentina. It included the second-generation C-Band Scanning ARM Precipitation Radar (CSAPR2), the bulb-like structure in the center. Its case-study data have been translated…
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Microwave Radiometer Retrievals VAP Available for New Set of ARM Campaigns
This Microwave Radiometer Retrievals (MWRRET) quicklook image provides information from the Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign on April 27, 2019. The image shows (a) observed brightness temperatures at 23.8 GHz (blue) and 31.4 GHz (red); (b) retrieved precipitable water vapor from the physical method (blue) and statistical method (green); and (c)…