Posts by Tristan Horner
Gathering 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…
Read MoreNIRIVANA at AGU Fall Meeting 2021
Be sure to check out the following NIRVANA presentations at AGU 2021: Barium in seawater: An isotopic perspective (OS25E-1044), Tuesday, 14 December, 16:00 – 18:00 in Poster Hall D-F The role of P-rich precursors in barite formation in the ocean (OS25E-1046), Tuesday, 14 December, 16:00 – 18:00 in Poster Hall, D-F Putting productivity proxies to…
Read MoreWelcome Peter!
We’re pleased to welcome Peter Crockford, WHOI Postdoctoral Scholar, to the NIRVANA Labs! Peter will be researching modern and ancient biogeochemical cycles alongside Ann Dunlea, Tristan Horner, and Scott Wankel.
Read MorePaper(s) in press: Putting productivity proxies to the test with GEOTRACES data
Are you interested in productivity, paleoceanography, or proxies, but don’t know where to start? Maybe you have a question about a specific bioactive element and want to find out if it has already been addressed? Or perhaps you just want to look at cartoons summarizing modern marine micronutrient cycling? If any of these apply to…
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