Mark your calendar! GEOTRACES Online Seminar #4 – 25 August 15:00 CEST
Dear colleagues,
The fourth GEOTRACES Online Seminar organised by the Early-Career Scientist Committee will be held on 25 August 2026, starting at 15:00 CEST:
Date: August 25, 2026 @ 15:00 CEST
Topic: Particle dynamics, scavenging & aggregation
Speakers: Christopher Hayes (University of Southern Mississippi, USA) and Yang Xiang (Louisiana State University, USA).
Brochure
By Zoom: https://geomar-de.zoom-x.de/j/63657733493?pwd=6Uman0pQaKQ56P9SkXoUfz55XqqO7a.1
Meeting ID: 636 5773 3493
Passcode: 651026
Further information about this seminar and other upcoming seminars is provided below.
As always, previous seminars in the series can be found on the GEOTRACES YouTube channel, where this seminar will also be posted. However, we warmly encourage your participation!
Best wishes,
GEOTRACES IPO
Seminar detailed information:
Topic: Particle dynamics, scavenging & aggregation
Date: August 25, 2026 @ 15:00 CEST
Moderator: Dr. Nolwenn Lemaitre
Title: From adsorption to regional boundary scavenging: bridging scales of trace element removal from the ocean
Speaker: Prof. Christopher Hayes (University of Southern Mississippi)
Abstract: Particulate matter in seawater acting as a removal term for trace elements, or chemical scavenging, has been recognized since the 1950’s. In this talk, I review the history of the role of scavenging in chemical oceanography and results from our group showing how productive gyres, upwelling zones, hydrothermal plumes and nepheloid layers can all be seen as regional centers of scavenging removal.
Title: Particle composition effect on trace metal scavenging in the global ocean
Speaker: Asst. Prof. Yang Xiang (Louisiana State University)
Abstract: Different particle phases vary in their ability to scavenge trace elements and their isotopes (TEIs). In this talk, I will highlight the disproportionate importance of manganese oxides in scavenging multiple TEIs in the global ocean, despite their relatively low abundance. I will also discuss recent advancements in particle scavenging models that incorporate surface area into parameterisations.
For more information and updates, check the seminar web page.
Upcoming seminars:
Date/Time: September 29th, 15:00 CEST
Topic: Biogeochemical Cycling of Redox-Sensitive Metals in Oxygen Minimum Zones
Moderator: Yang Xiang
Speakers: James W Moffett (University of Southern California, USA) & Jessalyn E. Davis (University of Washington, USA)
Date/Time: October 27th, 15:00 CET
Topic: Hydrothermal Impact on Ocean Biogeochemistry
Moderator: Lise Artigue
Speakers: Christopher German (Woods Hole Oceanographic Institution, USA) & Laura Moore (University of Victoria, Canada)
Date/Time: November 24th, 15:00 CET
Topic: Sediment-Water Interface Processes & Boundary Exchange
Moderator: Zhouling Zhang
Speakers: Florian Scholz (University of Hamburg, Germany) & Rhiannon Jones (British Antarctic Survey, UK)