Conference presentation
Investigating the role of sea salt particles generated by effervescent atomization technique on low-level clouds formation and microphysical properties
28th IUGG General Assembly (IUGG2023) (Berlin, Germany, 11/07/2023 - 20/07/2023)
12/07/2023
Metrics
14 Record Views
Abstract
We investigated the efficiency of the effervescent atomization technique in generating sea salt aerosol (SSA) particles to act as cloud condensation nuclei (CCN) and to modify cloud microphysical properties. The data were collected during Jan-Feb 2022 and Feb-Mar 2023 (currently in progress) on the RV Magnetic Research Vessel in the Great Barrier Reef. The CCN supersaturation spectra (CCN(S)) for S ranging from 0.1%-0.7% and aerosol particle size distributions measured for unperturbed/perturbed conditions over the Reef are analyzed. Two adiabatic parcel models are used to simulate the effect of additional SSA particles on cloud properties, assuming local thermodynamical conditions. Our preliminary results from simulations show that the additional SSA particles increase the number concentration of drops by a factor of ~ 2-3 at cloud bases (depending on CCN assumption for model initiation and updraft speeds at cloud bases). Compared with background conditions, the additional drops have the practical effect of warm rain suppression and an increase of cloud albedo of about 10-20% at cloud depths of 400 m (typical height of cloud tops of marine stratocumulus). Furthermore, comparison between model simulations and in situ measurements with aerosol and cloud probes on board a research aircraft are described (currently under analysis).
Details
- Title
- Investigating the role of sea salt particles generated by effervescent atomization technique on low-level clouds formation and microphysical properties
- Creators
- Ramon Braga - Southern Cross UniversityDaniel Rosenfeld - The Hebrew University of JerusalemLuke Harrison - Sydney Institute of Marine ScienceDaniel Harrison - Southern Cross University
- Conference
- 28th IUGG General Assembly (IUGG2023) (Berlin, Germany, 11/07/2023 - 20/07/2023)
- Grant note
- This work was undertaken as part of the Reef Restoration and Adaptation Program, funded by the partnership between the Australian Governments Reef Trust and the Great Barrier Reef Foundation.
- Identifiers
- 991013155312202368
- Academic Unit
- National Marine Science Centre; Faculty of Science and Engineering; Science
- Language
- English
- Resource Type
- Conference presentation