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Recent happenings

Pierre Cadeau

Welcome Pierre!

By Tristan Horner | 2024-02-01

I’m happy to welcome Pierre Cadeau, Postdoctoral Fellow, to the NIRVANA Labs! Pierre plans to investigate how non-traditional stable isotope systems, such as cadmium and nickel, can be used to trace Earth’s biogeochemical evolution. His project is supported by a Marie Skłodowska-Curie Actions Postdoctoral Fellowship and is being conducted in collaboration with Oliver Rouxel (Ifremer).…

Iulia on the deck of the R/V Kilo Moana

Paper in press: Insights into iodine cycling in the Subtropics

By Tristan Horner | 2024-01-08

I’m delighted to announce the publication of a study, led by Iulia Streanga, examining iodine cycling in the subtropical North Pacific Ocean. Our study aimed to uncover the dynamics of iodine redox transformations in seawater, particularly the conversion between its oxidized and reduced inorganic forms, and shed light on the rates at which these transformations…

Scleractinian deep-sea coral

Paper in press: Iodine incorporation into deep-sea corals

By Tristan Horner | 2023-11-07

I’m excited to report publication of a new study led by Lorena Sun investigating the incorporation of iodine into deep-sea scleractinian and bamboo corals. The paper is published in a Special Issue of Frontiers in Marine Sciences titled The Marine Iodine Cycle, Past, Present and Future. Oxygen is vital for marine life, and understanding how…

Barium in the Pacific Ocean

Paper in press: Barium in seawater ‘solved’

By Tristan Horner | 2023-09-13

We’re pleased to announce publication of a study led by Öykü Mete (SSF, 2021), published in Earth Systems Science Data. In this study we constrain the distribution of barium in the global ocean using machine learning. We developed thousands of machine learning models that could predict barium concentrations in seawater using GEOTRACES results from in…

Welcome Georgi!

By Tristan Horner | 2023-09-01

I’m pleased to welcome Georgi Laukert, Postdoctoral Fellow, to NIRVANA! Georgi plans to study how changing sea ice affects macro- and micronutrient cycling in the Arctic (Project ICEotopes). He project is being conducted in collaboration with Tristan Horner and Kate Hendry (British Antarctic Survey) and is supported by a Marie Skłodowska-Curie Actions Postdoctoral Fellowship. Welcome…

Dr. Logan Tegler

Congratulations Dr. Tegler!

By Tristan Horner | 2023-08-31

Congratulations to Dr. Logan Tegler, who successfully defended her Ph.D. thesis today! Logan’s thesis is titled: “From the atmosphere to the abyss: Tracing organic carbon deposition, cadmium isotopes, and iron cycling using marine sediments.” It will eventually post to DSpace@MIT, at which point I’ll update this post with a link here. Well done Logan, incredible…

AT50-10 cruise track

AT50-10 ‘CliOMZ’ wrapped!

By Tristan Horner | 2023-06-08

After 37 days at sea, AT50-10 ‘CliOMZ’ is complete, arriving in San Diego this morning. We sailed over 5,500 nautical miles, crossed the Equator twice, occupied 17 stations, and collected over 1,500 samples, which should keep us busy for a while! Below are a selection of photos from the expedition.          …

Looking through a porthole at Golfito Bay

AT50-10 ‘CliOMZ’ Underway!

By Tristan Horner | 2023-05-02

NIRVANA Lab members Peter Crockford, Ichiko Sugiyama, and Tristan Horner are in Golfito, Costa Rica, for the start of AT50-10 ‘CliOMZ,’ which sets sail on WHOI’s very own R/V Atlantis today. We will be studying connections between macro- (nitrate, phosphate) and micronutrients, such as iron, copper, iodine, and barium, in the low-oxygen waters of the…

Group Photo at 2023 Writing Retreat

Lab Writing Retreat 2023

By Tristan Horner | 2023-04-07

Seven members of the NIRVANA Labs, along with two special guests, journeyed to Yarmouth Port for our annual Lab Writing Retreat. Once again, we were delighted to welcome Ann Dunlea, who is collaborating with several group members on various projects, and Laura Motta, the newest Assistant Scientist in the Department of Marine Chemistry & Geochemistry.…

Looking off the fantail

Papers in press: Isotopic investigations of ion exchange in barite

By Tristan Horner | 2023-03-28

Two studies published by Jule Middleton documenting the rates, sensitivities, and barium-isotopic consequences of ion exchange in barite. The first paper investigated how fast and how much ion exchange affected the isotope composition of barium in barite–fluid systems. We did this by performing laboratory experiments under marine-relevant conditions. The main findings are that ion exchange…