TY - JOUR
T1 - Leaching material from Antarctic seaweeds and penguin guano affects cloud-relevant aerosol production
AU - Dall'Osto, Manuel
AU - Sotomayor-Garcia, Ana
AU - Cabrera-Brufau, Miguel
AU - Berdalet, Elisa
AU - Vaqué, Dolors
AU - Zeppenfeld, Sebastian
AU - van Pinxteren, Manuela
AU - Herrmann, Hartmut
AU - Wex, Heike
AU - Rinaldi, Matteo
AU - Paglione, Marco
AU - Beddows, David
AU - Harrison, Roy
AU - Avila, Conxita
AU - Martin-Martin, Rafael P.
AU - Park, Jiyeon
AU - Barbosa, Andrés
N1 - Copyright:
© 2022 The Authors
PY - 2022/7/20
Y1 - 2022/7/20
N2 - Within the Southern Ocean, the greatest warming is occurring on the Antarctic Peninsula (AP) where clear cryospheric and biological consequences are being observed. Antarctic coastal systems harbour a high diversity of marine and terrestrial ecosystems heavily influenced by Antarctic seaweeds (benthonic macroalgae) and bird colonies (mainly penguins). Primary sea spray aerosols (SSA) formed by the outburst of bubbles via the sea-surface microlayer depend on the organic composition of the sea water surface. In order to gain insight into the influence of ocean biology and biogeochemistry on atmospheric aerosol, we performed in situ laboratory aerosol bubble chamber experiments to study the effect of different leachates of biogenic material - obtained from common Antarctic seaweeds as well as penguin guano - on primary SSA. The addition of different leachate materials on a seawater sample showed a dichotomous effect depending on the leachate material added - either suppressing (up to 52%) or enhancing (22–88%) aerosol particle production. We found high ice nucleating particle number concentrations resulting from addition of guano leachate material. Given the evolution of upper marine polar coastal ecosystems in the AP, further studies on ocean-atmosphere coupling are needed in order to represent the currently poorly understood climate feedback processes.
AB - Within the Southern Ocean, the greatest warming is occurring on the Antarctic Peninsula (AP) where clear cryospheric and biological consequences are being observed. Antarctic coastal systems harbour a high diversity of marine and terrestrial ecosystems heavily influenced by Antarctic seaweeds (benthonic macroalgae) and bird colonies (mainly penguins). Primary sea spray aerosols (SSA) formed by the outburst of bubbles via the sea-surface microlayer depend on the organic composition of the sea water surface. In order to gain insight into the influence of ocean biology and biogeochemistry on atmospheric aerosol, we performed in situ laboratory aerosol bubble chamber experiments to study the effect of different leachates of biogenic material - obtained from common Antarctic seaweeds as well as penguin guano - on primary SSA. The addition of different leachate materials on a seawater sample showed a dichotomous effect depending on the leachate material added - either suppressing (up to 52%) or enhancing (22–88%) aerosol particle production. We found high ice nucleating particle number concentrations resulting from addition of guano leachate material. Given the evolution of upper marine polar coastal ecosystems in the AP, further studies on ocean-atmosphere coupling are needed in order to represent the currently poorly understood climate feedback processes.
KW - Antarctic
KW - Atmospheric marine biogeochemistry
KW - BEPSII
KW - CATCH
KW - SOLAS
KW - Sea ice-atmospheric interactions
KW - Sea spray aerosols
UR - http://www.scopus.com/inward/record.url?scp=85128926998&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2022.154772
DO - 10.1016/j.scitotenv.2022.154772
M3 - Article
VL - 831
JO - The Science of the Total Environment
JF - The Science of the Total Environment
M1 - 154772
ER -