News & Events

Data Announcements

This sample plot shows droplet number concentration from the EPCAPE ARM Mobile Facility site in La Jolla, California. The plot shows calculated droplet number concentration for two different periods. The droplet number concentration is generally seen between 0.0 and 0.4 m-3. Image is provided by Chitra Sivaraman, Pacific Northwest National Laboratory.

New and Updated Cloud Droplet Number Concentration Data Available

The Droplet Number Concentration (NDROP) value-added product has been processed for the 2023–2024 Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE). In addition, the VAP has been updated to use reprocessed multifilter rotating shadowband radiometer data from the Eastern North Atlantic observatory.

8 April 2025

The map shows the variational analysis domain for the sigma version of VARANAL for the EPCAPE field campaign. Enclosed by the black dots, the domain is centered at the ARM Mobile Facility site (red star) on the Ellen Browning Scripps Memorial Pier in La Jolla, California. Also shown is the variational analysis domain for the standard version of VARANAL, which is over ocean only and enclosed by the grey dots. A dark green star indicates the center of the ocean-only domain. Both domains have a radius of 75 kilometers. Image is from Cheng Tao, Lawrence Livermore National Laboratory.

Large-Scale Forcing Data Released for EPCAPE Campaign

Two evaluation versions of large-scale forcing data are now available for ARM's 2023–2024 Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) in La Jolla, California.

1 April 2025

A binary aerosol feature mask, with red and magenta dots marking the aerosol-layer base and top heights.

New Lidar Evaluation Data Product Provides Aerosol Features

A new ARM value-added product uses high-spectral-resolution lidar to identify aerosol features, including the top and base heights of the aerosol layers.

28 March 2025

Radiometers and other ARM instruments and containers are situated on a pier surrounded by the Pacific Ocean. A wall of gray clouds is visible along the horizon. A white cloud streaks above the water.

Improved Broadband Irradiance Data Released for EPCAPE Campaign

The Data Quality Assessment for ARM Radiation Data (QCRAD) product is now available for the 2023–2024 Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) in La Jolla, California.

26 February 2025

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