-
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…
-
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:…
-
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).…
-
ARM Best Estimate Data Released for SAIL Campaign
ARMBEATM relative humidity (top) and surface precipitation (bottom) are shown for the first 120 days of 2022 during the Surface Atmosphere Integrated Field Laboratory (SAIL) campaign. The Atmospheric Radiation Measurement (ARM) user facility provides tailored datastreams known as ARM Best Estimate (ARMBE) data products for use in the evaluation of global climate models. Two ARMBE…
-
TRACER 3-Channel Microwave Radiometer Retrieval Data Now Available
This Microwave Radiometer Retrievals version 2 (MWRRETv2) quicklook image provides data from February 2, 2022, at the ARM Mobile Facility site in La Porte, Texas, during the TRacking Aerosol Convection interactions ExpeRiment (TRACER). From top to bottom, panels show observed brightness temperatures at 23.8 (blue), 30 (red), and 89 GHz (green); physically (red and blue)…
-
Ramping Up the ARM Odyssey: A Tale of Ice-Nucleating Particles Over the Globe
Editor’s note: Jessie Creamean, a research scientist at Colorado State University and an ARM mentor for ice-nucleating particle collection and analysis, sent in the following update. Carson Hume stands in front of one of our trusty precipitation shields, i.e., salad bowls (yes, they really are salad bowls), over ice-nucleating particle (INP) filters at the S3…
-
Quality-Assured SAIL X-Band Radar Data Now Available
A site camera on Crested Butte Mountain captures the Colorado State University X-band scanning radar during the Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Crested Butte, Colorado. Quality-assured data from the radar are now available. During the 2021–2023 Surface Atmosphere Integrated Field Laboratory (SAIL) campaign near Crested Butte, Colorado, the Atmospheric Radiation Measurement (ARM)…
-
Radiosonde Parameter Calculation Data Sets Grow at 2 ARM Sites
This skew-T plot shows the pressure and temperature recorded by an ARM radiosonde launched from ARM’s Southern Great Plains Central Facility near Lamont, Oklahoma, on June 26, 2020. Red, blue, and green dots indicate different radiosonde parameters. New and historical data from the Convective Parameters Derived from Radiosonde Data value-added product (SONDEPARAM VAP) are now…
-
Stereo Camera Cloudiness Map Product Moves to Production
Clouds Optically Gridded by Stereo (COGS) data from ARM’s Southern Great Plains atmospheric observatory are presented for May 4, 2018. The top plot shows the number of cloudy grids as a function of time and height above the ground. Cloud base heights estimated as the 1% of the cloudy grid heights are marked with black…
-
TRACER Cell Tracking Data Shed Light on Convective Evolution
Using data from the second-generation C-Band Scanning ARM Precipitation Radar (CSAPR2), the panels provide reflectivity (a, c, e, g) and Doppler velocity (b, d, f, h) processed from three range-height indicator scans (a–f) and the lowest plan position indicator scan (g, h) during the TRacking Aerosol Convection interactions ExpeRiment (TRACER) on August 17, 2022, in…