# Johnston Lab Harvard University ![shark_bay_australia.jpg](/sites/g/files/omnuum8991/files/styles/hwp_28_10__1920x685/public/johnstonlab/files/shark_bay_australia.jpg?itok=WCh-5Rle) Our Lab is committed to fostering an inclusive environment that strives to ensure the success of under-represented students in the geosciences. Our focus is on equity and to provide the unique support and guidance required for all students to feel welcome and valued within our group, the Earth and Planetary Sciences Department, and at Harvard University. We also recognize that our lab facilities - and Harvard University - sit on the land of the Massachusett, Wampanoag, and Nipmuc people. Further, we conduct ourselves following a shared set of [expectations](/file_url/260) to best promote a safe and productive workplace. ## A Bit About Some of Our Research Watch what's going on at the Johnston Lab ## Disproportionation in the Johnston Lab Available in English, Spanish and French [ English arrow\_circle\_right ](https://www.youtube.com/watch?v=MW7B4ljATbs&feature=youtu.be) [ Spanish arrow\_circle\_right ](https://www.youtube.com/watch?v=k7GDudsfgtM&feature=youtu.be) [ French arrow\_circle\_right ](https://www.youtube.com/watch?v=-rdreYRnEr8&feature=youtu.be) ## Recent Research Highlights Download 7 citations download- [BibTeX](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=bibtex) - [EndNote X3 XML](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=endnote8) - [EndNote 7 XML](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=endnote7) - [Endnote tagged](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=tagged) - [Marc](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=marc) - [PubMedId](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=pubmed_id) - [RIS](/bibcite/export?pager_style=no_pager&number_of_items=7&sort_field=bibcite_year--desc&taxonomy_filters=&&&format=ris) ### 2025 Moriarty, S. N. (2025). [Effects of microbial alteration of oceanic crust on sulfur cycling in hydrothermal systems.](/publication/effects-microbial-alteration-oceanic-crust-sulfur-cycling-hydrothermal-systems) *Geochimica et Cosmochimica Acta*, *393*. Moriarty, S. N. (2025). [Effects of microbial alteration of oceanic crust on sulfur cycling in hydrothermal systems.](/publication/effects-microbial-alteration-oceanic-crust-sulfur-cycling-hydrothermal-systems) *Geochimica et Cosmochimica Acta*, *393*. - [ descriptionPublisher's Version](https://www.sciencedirect.com/science/article/pii/S0016703724006252?via%3Dihub) - [ descriptionPublisher's Version](https://www.sciencedirect.com/science/article/pii/S0016703724006252?via%3Dihub) Waldeck, A. (2025). [Marine sulphate captures a Paleozoic transition to a modern terrestrial weathering environment](/publication/marine-sulphate-captures-paleozoic-transition-modern-terrestrial-weathering-environment). *Nature Communications*, *16.1*. Waldeck, A. (2025). [Marine sulphate captures a Paleozoic transition to a modern terrestrial weathering environment](/publication/marine-sulphate-captures-paleozoic-transition-modern-terrestrial-weathering-environment). *Nature Communications*, *16.1*. - [ descriptionPublisher's Version](https://www.nature.com/articles/s41467-025-57282-y) - [ descriptionPublisher's Version](https://www.nature.com/articles/s41467-025-57282-y) Crocker, D., Sutherland, K. M., Freudenberg, B., Alonso, K., Pearson, A., Ward, C. P., & Johnston, D. T. (2025). [Tracking Photo-Oxidation Reactions of Aquatic Organic Matter Using Triple Oxygen Isotopes](/publication/tracking-photo-oxidation-reactions-aquatic-organic-matter-using-triple-oxygen-isotopes). *ACS Earth and Space Chemistry*. Crocker, D., Sutherland, K. M., Freudenberg, B., Alonso, K., Pearson, A., Ward, C. P., & Johnston, D. T. (2025). [Tracking Photo-Oxidation Reactions of Aquatic Organic Matter Using Triple Oxygen Isotopes](/publication/tracking-photo-oxidation-reactions-aquatic-organic-matter-using-triple-oxygen-isotopes). *ACS Earth and Space Chemistry*. - [ descriptionPublisher's Version](https://pubs.acs.org/doi/10.1021/acsearthspacechem.5c00057) - [ descriptionPublisher's Version](https://pubs.acs.org/doi/10.1021/acsearthspacechem.5c00057) Hong, Y., Zhu, L., Crocker, D., Liu, T., Wang, Z., Wei, Z., Yu, C., Wei, Y., Yan, H., Johnston, D. T., & Kohl, I. (2025). [Triple Oxygen Isotope Analysis of Methanesulfonate Using the SO3–Fragment in ESI-Orbitrap-MS.](/publication/triple-oxygen-isotope-analysis-methanesulfonate-using-so3-fragment-esi-orbitrap-ms) *Analytical Chemistry* . Hong, Y., Zhu, L., Crocker, D., Liu, T., Wang, Z., Wei, Z., Yu, C., Wei, Y., Yan, H., Johnston, D. T., & Kohl, I. (2025). [Triple Oxygen Isotope Analysis of Methanesulfonate Using the SO3–Fragment in ESI-Orbitrap-MS.](/publication/triple-oxygen-isotope-analysis-methanesulfonate-using-so3-fragment-esi-orbitrap-ms) *Analytical Chemistry* . - [ descriptionPublisher's Version](https://pubs.acs.org/doi/10.1021/acs.analchem.5c01382) - [ descriptionPublisher's Version](https://pubs.acs.org/doi/10.1021/acs.analchem.5c01382) Crockford, P. W., Waldeck, A. R., Bekker, A., Kunzmann, M., Ghosh, R., Ghosh, P., Sergeeva, N. D., Michurin, S., Halevy, I., & Johnston, D. T. (2025). [Depositional Controls on ∆17O Signatures of Sedimentary Sulfate](/publication/depositional-controls-17o-signatures-sedimentary-sulfate). *Geophysical Research Letters*, *52*(12). Crockford, P. W., Waldeck, A. R., Bekker, A., Kunzmann, M., Ghosh, R., Ghosh, P., Sergeeva, N. D., Michurin, S., Halevy, I., & Johnston, D. T. (2025). [Depositional Controls on ∆17O Signatures of Sedimentary Sulfate](/publication/depositional-controls-17o-signatures-sedimentary-sulfate). *Geophysical Research Letters*, *52*(12). - [ descriptionPublisher's Version](https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL114184) - [ descriptionPublisher's Version](https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL114184) ### 2024 Stockey, R., Cole, D., Farrell, U., Agic, H., Boag, T., Brocks, J., & Canfield, D. (2024). [Sustained increases in atmospheric oxygen and marine productivity in the Neoproterozoic and Paleozoic eras.](/publication/sustained-increases-atmospheric-oxygen-and-marine-productivity-neoproterozoic-and) *Nature Geoscience*, *17*. Stockey, R., Cole, D., Farrell, U., Agic, H., Boag, T., Brocks, J., & Canfield, D. (2024). [Sustained increases in atmospheric oxygen and marine productivity in the Neoproterozoic and Paleozoic eras.](/publication/sustained-increases-atmospheric-oxygen-and-marine-productivity-neoproterozoic-and) *Nature Geoscience*, *17*. - [ descriptionPublisher's Version](https://www.nature.com/articles/s41561-024-01479-1) - [ descriptionPublisher's Version](https://www.nature.com/articles/s41561-024-01479-1) ### 2023 Halevy, Fike, D. A., Pasquier, V., Bryant, R., Wenk, C., Turchyn, A. V., Johnston, D. T., & Claypool, G. (2023). [Sedimentary parameters control the sulfur isotope composition of marine pyrite.](/publication/sedimentary-parameters-control-sulfur-isotope-composition-marine-pyrite) *Science*, *382*(6673), 946-951. Halevy, Fike, D. A., Pasquier, V., Bryant, R., Wenk, C., Turchyn, A. V., Johnston, D. T., & Claypool, G. (2023). [Sedimentary parameters control the sulfur isotope composition of marine pyrite.](/publication/sedimentary-parameters-control-sulfur-isotope-composition-marine-pyrite) *Science*, *382*(6673), 946-951. - [ descriptionPublisher's Version](https://www.science.org/doi/10.1126/science.adh1215) - [ descriptionPublisher's Version](https://www.science.org/doi/10.1126/science.adh1215) [ More arrow\_circle\_right ](/publications)