Evidence of wet deposition in shallow convection over the Southern ocean ...

• Main Authors: Alinejadtabrizi, Tahereh, Lang, Francisco, Ackermann, Luis, Huang, Yi, Siems, Steven, Manton, Michael, Keywood, Melita, Krummel, Paul, Ayers, Greg, Humphries, Ruhi
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Southern Ocean
• Online Access: https://dx.doi.org/10.57757/iugg23-1333; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017275

<!--!introduction!--> The Southern Ocean (SO) exhibits some of the most pristine air on Earth, particularly during the winter season, when the lowest concentrations of cloud condensation nuclei (CCN) are observed. Historically, research has focused on the biogenic production of dimethyl sulfide as the primary explanation for the observed seasonal cycle in CCN and in support of the ‘CLAW’ hypothesis. More recent research, however, suggests that this hypothesis is incomplete and there is a need to better understand alternate sources (e.g., sea spray) and sinks (e.g., coalescence scavenging) to fully constrain the CCN budget. We examine the potential impact of the structure of marine boundary layer clouds on the CCN concentration through precipitation and wet deposition. Marine boundary layer clouds dominate the lower latitudes of the Southern Ocean, specifically the various states (open, closed, disorganised) of mesoscale cellular convection (MCC). Using a cloud climatology based on Himawari-8 ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...