• 64.250°S 56.630°W 198 m a.s.l.

Observational platform

Finland

• Finnish Meteorological Institute (FMI)

• Eija Asmi
  Facility PI
• María Belén Wildner
  PI deputy

The Argentinean station Marambio is on Seymour Island (Isla Marambio) in the Antarctic Peninsula. Marambio station runs year-round with personnel varying between 60 and 200 people. In the southern coast of the island lives a colony of about 20.000 Adelie pinguins during summer. Atmospheric composition measurements are done in collaboration between Argentina Servicio Meteorológico Nacional (SMN), Finnish Meteorological Institute (FMI) and Institute for Atmospheric and Earth System Research (INAR). Island of Marambio is covered with permafrost soil which is a regional dust source (e.g. Meinander et al., 2022) and the air is characteristic coastal/marine with a significant fraction of sea salt (e.g. Asmi et al., 2018).

Measurements of greenhouse gases and CO, aerosol scattering, and absorption, aerosol and ion size distribution and aerosol chemical composition have been run in Marambio on nearly continuous bases (Asmi et al., 2018). The measurement container is also equipped with meteorological and radiation sensors (Aun et al., 2020). Two intensive campaigns have been organized in the container during summers 2017/2018 and 2022/2023. During the campaigns, for example cloud condensation nuclei and cloud droplets, nucleating gases and neutral clusters, ammonia concentrations, ice nucleating particles and microbiological sampling, have been performed (Quéléver et al., 2022). In addition, meteorological observations in Marambio are done year-round both by NWS meteorological observer and by automatic instrumentation, including temperature and pressure sensors, pyranometer, 2D anemometer, and a Vaisala CL51 ceilometer.

• Asmi et al. (2018). Primary sources control the variability of aerosol optical properties in the Antarctic Peninsula. Tellus B: Chemical and Physical Meteorology, 70(1), 1414571. https://doi.org/10.1080/16000889.2017.1414571
• https://doi.org/10.5194/acp-20-6037-2020
• https://doi.org/10.5194/acp-22-11889-2022
• Quéléver et al. (2022). Investigation of new particle formation mechanisms and aerosol processes at Marambio Station, Antarctic Peninsula. Atmos. Chem. Phys., 22(12), 8417-8437. https://doi.org/10.5194/acp-22-8417-2022