Sea Ice Microbiota in the Antarctic Peninsula Modulates Cloud-Relevant Sea Spray Aerosol Production

• DOI: 10.3389/fmars.2022.827061
• Publication Date: 2022-06-17T12:17:39Z
• Authors: Manuel Dall’Osto; Dolors Vaqué; Ana Sotomayor-Garcia; Miguel Cabrera-Br...; Marta Estrada; Teresa Buchaca; Montserrat Soler; Sdena Nunes; Sebastian Zeppenfeld; Manuela van Pinxt...; Hartmut Herrmann; Heike Wex; Matteo Rinaldi; Marco Paglione; David C. S. Beddows; Roy M. Harrison; Elisa Berdalet
• Keywords: Biogeochemistry; Biogeochemical Cycle; Microbial loop; Ice nucleus; Sea spray

Sea spray aerosol (SSA) formation plays a major role in the climate system. The Antarctic Peninsula (AP) is affected by greatest warming occurring Southern Ocean; changes cryospheric and biological processes are being observed. Whilst there some evidence that organic material produced ice algae and/or phytoplankton high Arctic contributes to SSA, less known about (sympagic) regions. To gain insight into influence of biology biogeochemistry on atmospheric aerosol, we report simultaneous water-air measurements made means situ chamber experiments. For first time, present methodology showing controlled plunging jet settings do not cause cell disruption studied sea ecosystems. Larger cells (>20 µm; mainly diatoms) tend sediment at bottom (during 24h experiment) likely have minor SSA production. When comparing four experiments - find two producing more ones with highest abundance nanophytoplankton (<20 nanoflagellates) as well viruses. Our marine biogeochemical data show broad groups dissolved carbon: one rich carbohydrates proteic humic-like substances; latter enhancing This work provides unique insights productivity modulates production, potentially significant impacts. Further studies these types advised order see how microbiology impacts cycling elements aerosols formed processed cold