Data Announcements

An initial set of Plan Position Indicator (PPI) Hydrometeor Field Statistics (PPIHYD) evaluation data is now available for the 2019–2020 Cold-Air Outbreaks in the Marine Boundary Layer Experiment (COMBLE).

This product uses a machine learning model that can produce pixel-to-pixel predictions of clouds in lidar images. Users of the product get the predictions from the model, the cloud mask generated from the prediction output, the number of cloud layers, and the cloud layer boundaries.

These products, which are available for several ARM sites, retrieve column precipitable water vapor and liquid water path—both important variables to understand radiative transfer in the atmosphere and clouds.

A new Lagrangian trajectory-based large-scale forcing data product, covering three months of the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition, is now available for evaluation.

The multipurpose ARM trajectory (ARMTRAJ) value-added product provides back and forward trajectories for airmasses over ARM Mobile Facility deployments. The initial ARMTRAJ data are from the Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) in La Jolla, California.

ARM recently released more than five years of historical data from the Video Disdrometer Quantities (VDISQUANTS) value-added product for the Southern Great Plains Central Facility near Lamont, Oklahoma.

Radar data collected during the TRacking Aerosol Convection interactions ExpeRiment (TRACER) have undergone calibration, correction, and quality control processes beyond ARM’s standard quality checks and corrections.

These value-added products are specifically designed for the 2019–2020 Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition, which involved the deployment of a Doppler lidar and other ARM instruments on an icebreaker.

New data are available from Alaska, California, Colorado, Oklahoma, and Texas. More samples are currently being collected in Tasmania for analysis.

The Aerosol Optical Depth (AOD) value-added product derived from 7-channel multifilter rotating shadowband radiometer (MFRSR) measurements reports cloud-screened AOD from the direct normal irradiance measured by MFRSRs at ARM’s ground-based sites.