EPCAPE Radar b1 Data Processing: Corrections, Calibrations, and Processing Report

Technical Report · Sun Jun 01 04:00:00 EDT 2025

DOI:https://doi.org/10.2172/2586683· OSTI ID:2586683

Rocque, Marquette ^[1]; Deng, Min ^[2]; Feng, Ya-Chien ^[1]; Schuman, Eddie ^[1]; Cromwell, Erol ^[1]; Silber, Israel ^[1]; Matthews, Alyssa ^[1]; Wendler, Tim ^[1]; Castro, Vagner ^[1]; Lindenmaier, Iosif ^[1]

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1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
2. Brookhaven National Laboratory (BNL), Upton, NY (United States)

The U.S. Department of Energy (DOE)’s Atmospheric Radiation Measurement (ARM) user facility recently deployed its First ARM Mobile Facility (AMF1) to La Jolla, California as part of the Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) campaign. Some of the goals behind EPCAPE were to characterize the diurnal and seasonal cycles of stratocumulus clouds and to investigate the cloud-aerosol-radiation interactions and feedbacks in the area. The deployment of the AMF1 for a full year from 15 February 2023 to 14 February 2024 aided in addressing these scientific questions. While AMF1 collected data year-round, enhanced measurements were taken during two intensive operational periods (IOPs). The first IOP occurred from April to June and focused on the chemistry of low clouds (EPCAPE_Chem), while the second IOP occurred from July to September and was focused on the radiation of high clouds (EPCAPE_Radiation). Several cloud radars were deployed with AMF1 to collect valuable data on cloud properties that will help users address key science objectives. As in past ARM campaigns, a1-level radar data is extensively analyzed and calibration techniques are performed to generate b1-level data (Matthews et al. 2023, Feng et al. 2024). Radar data at the b1-level are of the highest quality and thus can be used to examine scientific questions. The status of the a1-level data and the a1-to-b1 process for the EPCAPE radars is subsequently detailed in this document.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center; Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER)
• Contributing Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-76RL01830; AC05-00OR22725
• OSTI ID: 2586683
• Report Number(s): DOE/SC--ARM-TR-318
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES