[A-CG47] Promotion of climate and earth system sciences using manned/unmanned aircrafts

[ACG47-P01] Aircraft observations of aerosols and clouds during High Ice Water Content (HIWC) flight campaign: Preliminary results

*Narihiro Orikasa¹, Masataka Murakami², Ayumi Iwata¹, Atsushi Matsuki³, Masayuki Toda⁴, HIWC Science Team USA⁵ (1.Meteorological Research Institute, Japan Meteorological Agency, 2.Institute for Space-Earth Environmental Research, Nagoya University, 3.Institute of Nature and Environmental Technology, Kanazawa University, 4.Graduate School of Natural Science and Technology, Kanazawa University, 5.National Aeronautics and Space Administration / Federal Aviation Administration)

Keywords:High ice water content, Aerosol-cloud interactions, Ice nucleating particle, Cloud condensation nuclei

In order to investigate the formation and development mechanism of high ice water content (HIWC) in deep convective clouds, and elucidate how the abundance of aerosol particles acting as CCN/INP may influence the HIWC conditions, the joint aircraft field campaigns among FAA, NASA, and Nagoya University were carried out. In-situ microphysical properties of aerosol particles sampled in the boundary layers as well as of cloud and precipitation were obtained during two summer campaigns in 2022: HIWC-2022 in Florida, USA (in July) and CPEX-CV in Cabo Verde (in September).
In the Florida campaign data, we discuss the correlation between the ice water content and number concentrations of ice particles in deep cumulonimbus and anvil clouds and the number concentrations of aerosols, CCN, and cloud droplets. We report the preliminary results on CCN and INP abilities of aerosol particles sampled below cloud base. A case which included the particle types not only of sea salt and mineral dust but of primary biological aerosol in coarse mode from TEM and SEM analysis was found to have higher INP ability than any other cases.