Aerosol-ice interactions in Southern ocean clouds ...
<!--!introduction!--> While biases in simulated Southern Ocean (SO) shortwave radiative fluxes have improved in CMIP6 compared to CMIP5 models, there are remaining concerns regarding SO mixed phase clouds due to their important role in the climate system. Recent modeling studies come to opposi...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-1024 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018225 |
| Summary: | <!--!introduction!--> While biases in simulated Southern Ocean (SO) shortwave radiative fluxes have improved in CMIP6 compared to CMIP5 models, there are remaining concerns regarding SO mixed phase clouds due to their important role in the climate system. Recent modeling studies come to opposing conclusions as to whether ice nucleation (IN) has a strong impact on SO shortwave cloud forcing. This study aims to investigate these conflicting findings using modeling and observations. In this work, we have implemented a deterministic immersion freezing ice nucleating particle (INP) scheme that includes contributions from mineral dust and marine sources into the Community Earth System Model version 2 (CESM2). This deterministic INP scheme replicates SO INP observations in the marine boundary layer with important sensitivities to modeled dust aerosol aloft. Simulated top-of-atmosphere cloud properties were minimally influenced by changes to the INP scheme. We investigated contributions of simulated cloud ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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