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Hydrometeor Field Spatial Statistics Derived From Radar Scans
A new evaluation data set, Plan Position Indicator (PPI) Hydrometeor Field Statistics (PPIHYD), provides spatial statistics based on distinct (clustered) hydrometeor fields from radar scans. By leveraging information harvested from Atmospheric Radiation Measurement (ARM) user facility scanning radar measurements, statistics such as spatial moments and percentiles are calculated for radar reflectivity and Doppler spectral width…
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Micropulse Lidar Cloud Mask Machine Learning VAP Released for 2 ARM Campaigns
The Micropulse Lidar Cloud Mask Machine Learning value-added product (MPLCMASKML VAP) is now available for two recent field campaigns conducted by the Atmospheric Radiation Measurement (ARM) user facility. Users can now access MPLCMASKML production data from the ARM Mobile Facility site that operated in La Porte, Texas, during the TRacking Aerosol Convection interactions ExpeRiment (TRACER).…
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New Aerosol Hygroscopicity Kappa Data Available
The hygroscopicity parameter kappa quantifies a particle’s capacity to take up water from the environment and activate into a cloud droplet. Kappa is often used to model the cloud condensation nuclei (CCN) activity of atmospheric aerosols of different sizes and compositions, providing additional insight into the influence of aerosols on climate. New data are available…
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Atmospheric Emitted Radiance Interferometer Product Expands to 4 ARM Campaigns
The Atmospheric Emitted Radiance Interferometer Optimal Estimation value-added product (AERIoe VAP) is now available in evaluation mode for the following four field campaigns conducted by the Atmospheric Radiation Measurement (ARM) user facility: the 2017–2018 Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA) campaign in the Azores (please see the note about ACE-ENA data below) the…
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Updated: Access New Gridded Cloud Radar Product for COMBLE Campaign
Editor’s note (July 20, 2023): A new KASACRGRIDPPI evaluation release for COMBLE, which uses b1-level calibrated PPI data as input, is now available. Output data from KASACRGRIDPPI are uncalibrated c1-level netCDF files, each comprising gridded observations for a single azimuthal scan. Surveillance scans are gridded for elevations of 0, 0.5, 1, and 2 degrees. Output…
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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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New ARM Data Epoch Assembled From COMBLE Campaign
A new data epoch focused on the Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) is now available from the Atmospheric Radiation Measurement (ARM) user facility. ARM data epochs are periods of well-characterized, calibrated measurements focused on a particular atmospheric phenomenon. For COMBLE, ARM deployed one of its mobile observatories on the coastal island…
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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…
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Doppler Lidar Data Products Released for 3 ARM Campaigns
The Atmospheric Radiation Measurement (ARM) user facility operates Doppler lidars around the globe to provide measurements of radial velocity, attenuated aerosol backscatter, and signal-to-noise ratio. Systems are typically operated using a fixed scan schedule. Doppler lidar data are used to derive horizontal wind and vertical velocity statistics. The Doppler Lidar Wind value-added product (DLPROF-WIND VAP)…
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Cloud Type Classification Product Released for COMBLE Campaign
The Cloud Type Classification value-added product (CLDTYPE VAP) is now available for the 2019–2020 Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE) deployment near Andenes, Norway. CLDTYPE provides an automated cloud type classification based on macrophysical quantities derived from vertically pointing lidar and radar at sites operated by the Atmospheric Radiation Measurement (ARM) user…