By Kendall Schoemann (staff writer in Rice University’s Office of Public Affairs) Two Rice University faculty members have been selected as 2019 Alfred P. Sloan Research Fellows. Mark Torres (Photo courtesy of Rice University) Mark Torres, assistant professor of Earth, environmental and planetary sciences, was honored for his work in the field of ocean sciences, […]
Laurence Y. Yeung, Joshua A. Haslun, Nathaniel E. Ostrom, Tao Sun, Edward D. Young, Maartje A. H. J. van Kessel, Sebastian Lücker, and Mike S. M. Jetten Abstract We describe an approach for determining biological N2 production in soils based on the proportions of naturally occurring 15N15N in N2. Laboratory incubation experiments reveal that biological […]
Boda Li, Laurence Y. Yeung, Huanting Hu, and Jeanine L. Ash Abstract Oxygen isotopologues are useful tools for understanding biogeochemical processes and chemical budgets in the ocean. For example, the triple‑oxygen isotope composition of dissolved oxygen in the ocean mixed layer (i.e., its δ17O and δ18O values) is widely used to estimate gross oxygen productivity […]
Laurence Y. Yeung, Justin A. Hayles, Huanting Hu, Jeanine L. Ash, and Tao Sun Rapid Comm. Mass Spectrom. (2018) doi: 10.1002/rcm.8247 Rationale: Isotope ratio measurements have become extremely precise in recent years, with many approaching parts‐per‐million (ppm) levels of precision. However, seemingly innocuous errors in signal baselines, which exist only when gas enters the instrument, […]
Laurence Y. Yeung, Shuning Li, Issaku E. Kohl, Joshua A. Haslun, Nathaniel E. Ostrom, Huanting Hu, Tobias P. Fischer, Edwin A. Schauble and Edward D. Young Abstract Molecular nitrogen (N2) comprises three-quarters of Earth’s atmosphere and significant portions of other planetary atmospheres. We report a 19 per mil (‰) excess of 15N15N in air relative […]
Laurence Y. Yeung Abstract The evolution of Earth’s atmosphere on >106>106-yr timescales is tied to that of the deep Earth. Volcanic degassing, weathering, and burial of volatile elements regulates their abundance at the surface, setting a boundary condition for the biogeochemical cycles that modulate Earth’s atmosphere and climate. The atmosphere expresses this interaction through its […]
E. D. Young, I. E. Kohl, B. Sherwood Lollar, G. Etiope, D. Rumble III, S. Li (李姝宁), M. A. Haghnegahdar, E. A. Schauble, K. A. McCain, D. I. Foustoukos, C. Sutclife, O. Warr, C. J. Ballentine, T. C. Onstott, H. Hosgormez, A. Neubeck, J. M. Marques, I. Pérez-Rodríguez, A. R. Rowe, D. E. LaRowe, C. […]
Yeung, L. Y., L. T. Murray, J. L. Ash, E. D. Young, K. A. Boering, E. L. Atlas, S. M. Schauffler, R. A. Lueb, R. L. Langenfelds, P. B. Krummel, L. P. Steele, and S. D. Eastham, “Isotopic ordering in atmospheric O2 as a tracer of ozone photochemistry and the tropical atmosphere,” J. Geophys. Res. […]
Widespread collapse of the Ross Ice Shelf during the late Holocene Proceedings of the National Academy of Sciences, vol. 113 no. 9, 2354–2359, doi: 10.1073/pnas.1516908113 Yusuke Yokoyama*, John B. Anderson, Masako Yamane, Lauren M. Simkins, Yosuke Miyairi, Takahiro Yamazaki, Mamito Koizumi, Hisami Suga, Kazuya Kusahara, Lindsay Prothro, Hiroyasu Hasumi, John R. Southon, and Naohiko Ohkouchi […]
A new paper from Laurence Yeung on the fundamentals of “clumped-isotope” fractionation, was recently accepted in Geochimica et Cosmochimica Acta. It shows, through simple theoretical arguments, the factors influencing the occurrence of rare-isotope pairs in molecules when they are made. One might be able to base future tracers of biogeochemistry on these principles. One of the […]
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