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Cloud Condensation Nuclei Vertical Profile Data Product Extended to ENA
The Retrieved Number concentration of Cloud Condensation Nuclei value-added product (RNCCN VAP) is now available for evaluation for the Eastern North Atlantic (ENA) atmospheric observatory. This VAP provides the vertical distribution of cloud condensation nuclei (CCN) number concentrations at Atmospheric Radiation Measurement (ARM) User Facility sites for better representation of aerosol indirect effects in climate…
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New Merged Product Integrates G-1 Flight Data
From 2010 until its final science mission in 2018, the Gulfstream-159 (G-1) aircraft served as the Atmospheric Radiation Measurement (ARM) user facility’s main airborne research laboratory. The new ARM Aerial Facility (AAF) Merged value-added product (AAFMERGED VAP) for historical AAF G-1 campaigns has been developed to provide users with a set of frequently used G-1…
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New 2- and 3-Channel Microwave Radiometer Retrieval Data Produced
Both versions of the Atmospheric Radiation Measurement (ARM) user facility’s value-added product (VAP) for microwave radiometer retrievals are now available for the 2023–2024 Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) in La Jolla, California. These products retrieve column precipitable water vapor and liquid water path—both important variables to understand radiative transfer in the atmosphere and…
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Improved Broadband Radiation Data Available From ARM Fixed Sites
The Atmospheric Radiation Measurement (ARM) user facility processes yearly data from the Data Quality Assessment for ARM Radiation Data (QCRAD) product—the recommended ARM datastream for broadband surface irradiance measurements—to produce level 2 (c2) files. These files undergo additional processing to improve the data. New c2-level data are available for all three of ARM’s fixed-location atmospheric…
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Aerosol Optical Depth Best Estimate Production Data Available for 2 ARM Sites
Aerosol Optical Depth Best Estimate 5-Channel (AODBE5CH) production data are now available for the Atmospheric Radiation Measurement (ARM) user facility’s Eastern North Atlantic (ENA) and Southern Great Plains (SGP) atmospheric observatories. Scientists can use the AODBE5CH value-added product (VAP) to analyze the variability of aerosol loading over multiple time scales and to demonstrate the importance…
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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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ARM Expands Collection of Merged Aerosol Size Distribution Data
The Atmospheric Radiation Measurement (ARM) user facility currently operates at least four instruments that measure a portion of the ambient aerosol size distribution. Most users are interested in the entire size distribution or a portion of the size distribution that extends across the measurement range of multiple instruments. However, merging these distributions is not trivial…
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Radiosonde Parameter Calculation Data Sets Grow at 2 ARM Sites
New and historical data from the Convective Parameters Derived from Radiosonde Data value-added product (SONDEPARAM VAP) are now available for the Atmospheric Radiation Measurement (ARM) user facility’s Southern Great Plains (SGP) and Eastern North Atlantic (ENA) atmospheric observatories. SONDEPARAM applies stable and consistent algorithms from Wang et al. (2020) for calculating useful radiosonde convective cloud…
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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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New and Improved ARM Broadband Radiation Data Now Available
The Atmospheric Radiation Measurement (ARM) user facility’s longtime recommended datastream for broadband surface irradiance measurements is Data Quality Assessment for ARM Radiation Data (QCRAD). The QCRAD value-added product (VAP) is now available for the 2021–2023 Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Crested Butte, Colorado. In addition, ARM produced new level 2 (c2) QCRAD…