Date of Award

January 2023

Document Type


Degree Name

Master of Science (MS)


Atmospheric Sciences

First Advisor

David J. Delene


The introduction of the Water Content Measurement probe (WCM-3000) onto the NASA P-3 aircraft during the NASA Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) 2022 and 2023 field campaign raises opportunity for measurement comparisons between liquid water content instruments. Instrument comparisons are done between the King hot-wire probe, the WCM-3000, and the Cloud Droplet Probe (CDP) using the IMPACTS 2023 field campaign data. Case studies are analyzed in three cloud conditions; liquid water clouds with droplets less than 50 µm, supercooled liquid water clouds with droplets less than 50 µm, and ice phase clouds. The WCM-3000 and King Probe did not agree within measurement uncertainties. Possible WCM-3000 issues are a time-offset, a hysteresis effect and an overdamped control system. Analysis indicates that likely the WCM is overdamped, and discussion is on-going with the manufacturer regarding the WCM performance.