Leaching material from Antarctic seaweeds and penguin guano affects cloud-relevant aerosol production

• DOI: 10.1016/j.scitotenv.2022.154772
• Publication Date: 2022-03-30T00:45:36Z
• Authors: Manuel Dall'Osto; Ana Sotomayor-Garcia; Miguel Cabrera-Br...; Elisa Berdalet; Dolors Vaqué; Sebastian Zeppenfeld; Manuela van Pinxt...; Hartmut Herrmann; Heike Wex; Matteo Rinaldi; Marco Paglione; David Beddows; Roy Harrison; Conxita Avila; Rafael P. Martin-...; Jiyeon Park; Andrés Barbosa
• Keywords: Guano; Biogeochemistry; Sea spray; Marine ecosystem; Terrestrial ecosystem

Within the Southern Ocean, greatest warming is occurring on Antarctic Peninsula (AP) where clear cryospheric and biological consequences are being observed. coastal systems harbour a high diversity of marine terrestrial ecosystems heavily influenced by seaweeds (benthonic macroalgae) bird colonies (mainly penguins). Primary sea spray aerosols (SSA) formed outburst bubbles via sea-surface microlayer depend organic composition water surface. In order to gain insight into influence ocean biology biogeochemistry atmospheric aerosol, we performed in situ laboratory aerosol bubble chamber experiments study effect different leachates biogenic material - obtained from common as well penguin guano primary SSA. The addition leachate materials seawater sample showed dichotomous depending added either suppressing (up 52%) or enhancing (22-88%) particle production. We found ice nucleating number concentrations resulting material. Given evolution upper polar AP, further studies ocean-atmosphere coupling needed represent currently poorly understood climate feedback processes.