Long-term variability in immersion-mode marine ice-nucleating particles from climate model simulations and observations

Abstract s diagnostic used in this study is a reasonable approximation of the exact formulation of CNT, when applied to ice spectrometer measurements in low-INP conditions similar to Macquarie Island. However, the linearized 10 s diagnostic underestimates the exact formula by an order of magnitude or more in places with high-INP conditions like the Sahara. Overall, our findings suggest that it is important to correct the biases in E3SM's simulated dust life cycle and update E3SM's INP parameterizations. INP prediction errors of 2 to 3 orders of magnitude can have considerable impacts on the simulated cloud and radiative properties in global climate models. On comparing INP concentrations during MICRE against ship-based campaigns, Measurements of Aerosols, Radiation, and Clouds over the Southern Ocean (MARCUS) and Antarctic Circumnavigation Expedition (ACE), we find that INPs from the latter are significantly higher only in regions closer to Macquarie Island. This alludes to the fact that physical, chemical and biological processes affecting INP concentrations as stimulated by the island could be partly responsible for the high INP concentrations observed at Macquarie Island during the MICRE campaign. Therefore, improvements to both aerosol simulation and INP parameterizations are required to adequately simulate INPs and their cloud impacts in E3SM. It will be helpful to include a parallel measurement of the size-resolved aerosol composition and explore opportunities for long-term measurement platforms in future field campaigns studying INP sources in remote marine regions.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Long-term variability in immersion-mode marine ice-nucleating particles from climate model simulations and observations ; volume:23 ; number:10 ; year:2023 ; pages:5735-5762 ; extent:28 ; Atmospheric chemistry and physics ; 23, Heft 10 (2023), 5735-5762 (gesamt 28)

Contributors, Places and Time

• Creator: Raman, Aishwarya ; Hill, Thomas ; DeMott, Paul J. ; Singh, Balwinder ; Zhang, Kai ; Ma, Po-Lun ; Wu, Mingxuan ; Wang, Hailong ; Alexander, Simon P. ; Burrows, Susannah M.

Further information

• DOI: 10.5194/acp-23-5735-2023
• URN: urn:nbn:de:101:1-2023052504145935758711
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 11:00 AM CEST