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SUMMARY:Do Diel Biogeochemical Cycles in the Subtropical Front Persist Acr
 oss Ocean Basins?
DTSTART:20260415T111500Z
DTEND:20260415T123000Z
DTSTAMP:20260418T075100Z
UID:indico-event-1049@events.geomar.de
CONTACT:office-fb2@geomar.de
DESCRIPTION:Speakers: Theresa Barthelmeß (GEOMAR)\n\nAbstractThe subtropi
 cal front is a latitudinal band where subtropical and subantarctic water m
 asses converge\, enhancing phytoplankton production and overall biological
  activity. In 2020\, we investigated diel cycling of organic matter and th
 e formation of secondary aerosols in the subtropical front of the Pacific 
 Ocean (Sea2Cloud\, RV Tangaroa). We observed a previously unrecognized but
  pronounced diel cycling of dissolved phytoplankton products\, potentially
  linked to aerosol precursor formation and cloud-relevant processes. We hy
 pothesized that viral lysis drives the nighttime release of bioavailable a
 mino acids\, stimulating microbial degradation and the production of nitra
 te-enriched secondary aerosol precursors.To assess whether similar small-s
 cale biogeochemical patterns occur across regions and time\, a team from G
 EOMAR conducted a campaign in 2025 across the subtropical front of the Ind
 ian Ocean (SOPHYAC-light\, RV Marion Dufresne II). Our participation was s
 upported by the GEOMAR Flexible Funds for Postdoctoral Activities. In the 
 upcoming RD2 seminar\, I will present our preliminary results.\n\nSeminar 
 linkhttps://geomar.webex.com/geomar/j.php?MTID=ma522f5f4b0af40855947a88dcf
 5482d3\n\nhttps://events.geomar.de/event/1049/
LOCATION:5-1.213 - PAZIFIK / PACIFIC- Rechte Seite - Großer\, unterteilba
 rer Konferenzraum (GEOMAR - Standort Ostufer  / GEOMAR - East Shore)
URL:https://events.geomar.de/event/1049/
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