Marine carbohydrates in the Arctic- from the ocean to the atmosphere ...

• Main Authors: Zeppenfeld, Sebastian, van Pinxteren, Manuela, Hartmann, Susan, Wex, Heike, Herrmann, Hartmut
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Arctic
• Online Access: https://dx.doi.org/10.57757/iugg23-2745; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019142

<!--!introduction!--> Marine carbohydrates are produced by microbes in the ocean and contribute significantly to dissolved and particulate organic carbon in the seawater. Recent studies showed that the carbohydrates released by Arctic microorganisms exhibit an extraordinarily high ice nucleating activity making them potentially important ice nucleating particles (INP). These carbohydrates enter the atmosphere as part of sea spray aerosol (SSA) through wind-driven processes and eventually contribute to cloud formation processes. However, the emission processes of marine carbohydrates and their atmospheric aging are still not well understood. Here, we present marine carbohydrates found in bulk seawater (at 1 m depth), the sea surface microlayer (SML), size-resolved aerosol particles and fog water collected in the Arctic during the PASCAL/SiPCA cruise (May-July 2017). Chemical and statistical analyses revealed a chemo-selective transfer of carbohydrates towards sodium during the sea-air transfer. ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...