---
myst:
  html_meta:
    description: "Lamont Ocean Nitrogen Group, led by Colette Kelly at Lamont-Doherty Earth Observatory, Columbia University. Research on marine nitrogen cycling, nitrous oxide (N2O), air-sea fluxes, oxygen-deficient zones, BGC-Argo floats, machine learning, and GO-SHIP."
    keywords: "Colette Kelly, Lamont Ocean Nitrogen Group, nitrous oxide, N2O, marine nitrogen cycle, oceanography, Lamont-Doherty Earth Observatory, Columbia University, BGC-Argo, GO-SHIP, machine learning, pyisotopomer"
    author: "Colette Kelly"
    "property=og:title": "Lamont Ocean Nitrogen Group | Colette Kelly"
    "property=og:description": "Marine nitrogen cycling and nitrous oxide research at Lamont-Doherty Earth Observatory, Columbia University."
    "property=og:image": "https://ckelly314.github.io/_static/logo.png"
---
# Lamont Ocean Nitrogen Group

**Colette Kelly** · Lamont-Doherty Earth Observatory · Columbia Climate School

I'm an oceanographer who studies the marine nitrogen cycle, and in particular **nitrous oxide (N₂O)**: a potent greenhouse gas and ozone-depleting substance that the ocean both produces and releases to the atmosphere. My work combines shipboard observations, autonomous floats, and machine learning to map where N₂O is made, how it moves through the ocean interior, and how much escapes across the air-sea interface.

This site is the home base for my research projects, publications, and group. I also collaborate with the [McKinley Ocean Carbon Group](https://galenmckinley.github.io/).

<figure class="video-embed">
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    <iframe src="https://www.youtube.com/embed/Lw787XSdooM?si=BrYGmfFRIp9-kvTH" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
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  <figcaption>Preliminary results.</figcaption>
</figure>

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:::{grid-item-card} Research
:link: research
:link-type: doc
Machine learning for N₂O air-sea fluxes, nitrogen-carbon coupling in oxygen-deficient zones, N₂O production pathways, and pyisotopomer.
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:::{grid-item-card} Fieldwork
:link: fieldwork
:link-type: doc
GO-SHIP expeditions: A16S (2026, Co-Chief Scientist) and P16C (2027, Chief Scientist).
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:::{grid-item-card} Publications
:link: publications
:link-type: doc
Papers, datasets, and code.
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:::{grid-item-card} People
:link: people
:link-type: doc
Who's in the group.
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:::{grid-item-card} Tutorials
:link: tutorials
:link-type: doc
How-to guides for scientific computing: HPC clusters, Jupyter, conda, git, and GPUs.
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:::{grid-item-card} Opportunities
:link: opportunities
:link-type: doc
Interested in working together? Start here.
:::
::::

(contact)=
## Contact

```{container} social-icons
[![Email](images/email.svg "Email: clk2136@columbia.edu")](mailto:clk2136@columbia.edu)
[![CV](images/cv.svg "Download CV (PDF)")](https://ckelly314.github.io/Kelly_CV.pdf)
[![GitHub](images/github.png "GitHub")](https://github.com/ckelly314)
[![Google Scholar](images/googlescholar.png "Google Scholar")](https://scholar.google.com/citations?user=_pUWmukAAAAJ)
[![ORCID](images/orcid.png "ORCID")](https://orcid.org/0000-0002-3660-4442)
[![LinkedIn](images/linkedin.png "LinkedIn")](https://www.linkedin.com/in/colette-kelly-4b4084168/)
```