Posts by Tristan Horner
GEOTRACES GP17-OCE Underway!
The penultimate U.S. GEOTRACES section cruise, GP17-OCE, is underway! Two members of the NIRVANA Lab, Margot Debyser and Iulia Streanga, are on board. Sailing with them is NIRVANA alum Jule Middleton, who is the Nutrient Supertech for this leg. Prior to sailing, all expedition participants had to participate in a seven-day quarantine for COVID-19. Margot…
Read MoreWelcome Ichiko!
I’m pleased to welcome Ichiko Sugiyama, Postdoctoral Investigator, to NIRVANA! Ichiko will be using iron isotopes to quantify microbial metal demand in the Eastern Tropical Pacific. She is working jointly with Mak Saito and Tristan Horner on a project supported by the Ocean & Climate Innovation Accelerator consortium. Welcome Ichiko! Check out: Ichiko’s Twitter (@FerrousChiko),…
Read MoreWelcome Margot!
We are pleased to welcome Margot Debyser, Postdoctoral Investigator, to the NIRVANA Labs! Margot will be leading lab efforts to constrain the cycling of radium and barium isotopes along the US GEOTRACES GP17 transect with Matt Charette and Tristan Horner.
Read MoreGathering at Goldschmidt
Several team members from the NIRVANA Labs are presenting their research at the 2022 Goldschmidt Conference in Honolulu HI this week, including: East Greenland’s rising impact on the marine silicon cycle constrained by silicon isotopes, presented by Georgi Laukert (Monday 11th, 11:15 HST) Barium isotope fractionation during ion exchange at the barite-fluid interface: Implications for…
Read MoreA Day at the Museum
Jurek, Logan, Iulia, Peter, and Tristan were at the Museum of Science, Boston for: “An Encounter with Isotopes, ICP, Lasers, and Mass Spectrometry.” We learned about laser ablation, the Neoma MS/MS MC-ICP-MS, and recent developments in measuring the isotope composition of intact molecules. Thank you to ThermoFisher Scientific for the day out!
Read MoreNortheast Geobiology Symposium 2022
Öykü Mete is at the Northeastern Geobiology Symposium presenting her research looking at the marine distribution of barium (Poster Session #1). Poster info: Mete, Ö.Z., H.H. Kim, A.G. Dunlea, A.V. Subhas, and T.J. Horner (2022). Dissolved distribution of barium in seawater and its relationship to silicon.
Read MoreCongratulations Dr. Middleton!
Congratulations to Dr. Jule Middleton, who today successfully defended their thesis entitled: Barium isotope cycling in the marine environment: Pathways of fractionation and implications for paleoceanographic applications. Amazing work! The thesis can be accessed here, via DSpace@MIT.
Read MorePaper in press: Margins matter for the Arctic barium budget
What controls the distribution of dissolved barium in the Arctic? This is the question we tried to answer in a recent study led by Laura Whitmore. The study integrates measurements of dissolved and particulate barium and barium isotope compositions measured on samples collected during four GEOTRACES Arctic expeditions in 2015—GN01, GN02, GN03, and GN04 (HLY1502,…
Read MoreWriting Retreat 2022
Seven members of the NIRVANA Labs gathered at the Old Red Farm Inn in Little Harbor, Wareham, for a Writing Retreat—the first group retreat since 2019. Lots of exciting projects coming down the pipeline!
Read MoreWe are hiring!
We are looking to recruit a Postdoctoral Investigator to join the team to study the cycling of radium and/or barium isotopes in the Southern Ocean as part of GEOTRACES GP17. The initial appointment would be for 18 months with the possibility of renewal for a further 18 months. Review of applications will begin on February…
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