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Characterized and Corrected Radar Data Available for MOSAiC Expedition
From top to bottom, the figure shows the Marine W-Band ARM Cloud Radar (MWACR) raw reflectivity, MWACR corrected reflectivity, and Ka-Band ARM Zenith Radar general mode (KAZR GE) reflectivity for January 2, 2020, during the MOSAiC expedition. ARM staff applied a reflectivity offset to the MWACR data to bring them in line with the KAZR…
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Tropical Storm Hilary Is Focus of ARM EPCAPE Data Epoch
With EPCAPE instruments in the foreground, a camera on Mount Soledad captures Tropical Storm Hilary sweeping through La Jolla, California, on August 20, 2023. View more images from the storm. A new data epoch from the Atmospheric Radiation Measurement (ARM) user facility captures a piece of history observed during a recent field campaign in La…
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Surface Spectral Albedo Product Updated
This example quicklook from the SURFSPECALB value-added product shows the estimated spectral albedo for each of the seven multifilter radiometer channels for the 10-meter tower at ARM’s Southern Great Plains atmospheric observatory on May 1, 2023. In fiscal year 2021, the Atmospheric Radiation Measurement (ARM) user facility added a seventh channel to its multifilter rotating shadowband…
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Micropulse Lidar Cloud Mask Machine Learning VAP Released for 2 ARM Campaigns
This sample quicklook plot from the TRACER ARM Mobile Facility site shows the log of the normalized relative backscatter (log10 NRB), linear depolarization ratio (LDR), and cloud mask from the MPLCMASKML value-added product for September 6, 2022. In addition, the plot contains the machine learning model’s confidence in its prediction, as well as cloud base…
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Microwave Radiometer Retrieval Data Now Available for SAIL
This MWRRET quicklook image provides information from the SAIL campaign near Crested Butte, Colorado, on March 22, 2022. From top to bottom, the image shows observed brightness temperatures at 23.8 GHz (blue) and 31.4 GHz (red); retrieved precipitable water vapor from the physical method (blue) and statistical method (green); and retrieved liquid water path from…
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Black Carbon Data Product Available for Use
Sample plots show black carbon mass concentrations and size distributions from February 16, 2020, at ARM’s North Slope of Alaska (NSA) atmospheric observatory. On this day, smoke from biomass burning approached the NSA. The Atmospheric Radiation Measurement (ARM) user facility developed a data product for scientists to measure the black carbon (BC) mass loadings in…
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New Aerosol Hygroscopicity Kappa Data Available
Sample CCNSMPSKAPPA plots from the Surface Atmosphere Integrated Field Laboratory (SAIL) field campaign in Colorado show kappa values within critical diameter-supersaturation field space (top) and a time series of kappa (bottom) on March 15, 2022, at ARM’s Aerosol Observing System (AOS) site on Crested Butte Mountain. The CCN particle counter and SMPS operated as part…
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ARM Expands Collection of Merged Aerosol Size Distribution Data
The plots show a selection of hand-labeled quality assessments (good, indeterminate, and bad) for MERGEDSMPSAPS aerosol size distributions from ARM data. These distributions and labels were used to train the MERGEDSMPSAPSML value-added product. The Atmospheric Radiation Measurement (ARM) user facility currently operates at least four instruments that measure a portion of the ambient aerosol size…
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Data Loss Assessed From EPCAPE Campaign
After replacing the site data system at the Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) in La Jolla, California, the Atmospheric Radiation Measurement (ARM) user facility has determined which data are missing and therefore unrecoverable as a result of the October 2023 system failure. Here is the list of the affected instruments/datastreams and date ranges:…
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Large-Scale Forcing Data Released for TRACER Campaign
Continuous large-scale forcing data are now available for the TRacking Aerosol Convection interactions ExpeRiment (TRACER), conducted by the Atmospheric Radiation Measurement (ARM) user facility from October 2021 through September 2022 in the Houston, Texas, area. The derived forcing data are based on a constrained variational analysis approach (Zhang and Lin 1997; Zhang et al. 2001).…