我主要专注于利用稳定同位素地球化学来探究地球系统的多个不同的方面——尤其渴望对于在地质学、生物学及全球/区域气候变化相互关联及作用的领域展开探索。我主要的研究经历在于创建、发展新兴的高精度稳定同位素测试方法(如：三氧同位素、团簇同位素)并将其应用于不同的地球体系中，以同位素的分馏或团簇现象的形成和消褪来制约地球物质转化过程中的化学热动力学平衡或扰动状态，从而见微知著，诠释全球的物质循环及环境变化。具体研究方向包括：（1）C-H-O-S同位素体系研究俯冲带流体活动及相关元素分异和深部物质循环。（2）15N15N团簇同位素示踪行星大气圈的演化。（3）三氧同位素对于全球水汽循环及局域古湿度古水文的制约。（4）碳酸盐13C18O团簇同位素用于古气候中的测温。（5）13C-D, D-D双团簇同位素体系示踪甲烷成因。

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o Yeung L. Y., Li S. (李姝宁), Kohl I. E., Haslun J. A., Ostrom N. E., Hu H., Fischer T. P., Schauble E. A. and Young E. D. (2017) Extreme enrichment in atmospheric 15N15N. Science Advances. 3, eaao6741.

o Li S. (李姝宁), Levin N. E., Soderberg K., Dennis K. J. and Caylor K. K. The triple oxygen isotope composition of leaf waters in Mpala, central Kenya. (2017) Earth Planet Sci. Lett. 468, 38-50.

o Young E. D., Kohl I. E., Lollar B. S., Etiope G., Rumble D., Li S. (李姝宁), Haghnegahdar M. A., Schauble E. A., McCain K. A., Foustoukos D. I., Sutclife C., Warr O., Ballentine C. J., Onstott T. C., Hosgomez H., Neubeck A., Marques J. M., Pérez-Rodriguez I., Rowe A. R., LaRowe D. E., Magnabosco C., Yeung L. Y., Ash J. L. and Bryndzia L. T. (2017) The relative abundances of resolved 12CH2D2 and 13CH3D and mechanisms controlling isotopic bond ordering in abiotic and biotic methane gases. Geochim. Cosmochim. Acta 203, 235-264.

o Li S. (李姝宁), Levin N.E. and Chesson L.A. (2015) Continental scale variation in 17O-excess of meteoric waters in the United States. Geochim. Cosmochim. Acta 164, 110-126.

o Passey B. H., Hu H., Ji H. Montanari S., Li S., Henkes G. A. and Levin N. E. (2014) Triple oxygen isotopes in biogenic and sedimentary carbonates. Geochim. Cosmochim. Acta 141, 1-25.

o Freeman H., Feng X., Li S., Zegre N., Lin J. C., Bowen G. (2014) High frequency trends in the isotopic composition of Superstorm Sandy. In Learning from the Impacts of Superstorm Sandy. Bennington J. B. and Farmer E. C., Elsevier.

o Sheng Y., Zheng Y, Li S. and Hu Z. (2013) Element mobility during continental collision: insights from polymineralic metamorphic vein with UHP eclogite in the Dabie orogen. Jounal of Metamorphic Geology. 31, 221-241.

o Berman S. F., Levin N. E., Landais A., Li S. and Owano T. (2013) Measurement of δ18O, δ17O and 17O-excess in water by off-axis integrated cavity output spectroscopy and isotope ratios mass spectrometery. Anal. Chem. 85, 10392-10398.

o Gao X., Li S. and Zheng Y. (2011) On the study multiphase solid inclusions in UHP metamorphic minerals. Acta Petrologica Sinica. 27, 469-489. (in Chinese, with English abstract)

o Li S., Yeung L. Y., Young E. D., Ostrom N. E. and Haslun J. A. (2015) Triple-isotopologue analysis of N2 as a tracer of the global nitrogen cycle. (5th International Workshop on Clumped Isotopes, St Petersburg, FL, USA).

o Li S, Levin N. E, Chesson L. A. (2011) Triple oxygen isotope composition of tap waters from the conterminous United States. (Isoscapes Meeting, West Lafayette, IN, USA).

o David Elliott Memorial (2013, JHU研究生奖学金)

o Ehleringer Prize (2011, Isoscapes会议 ‘best talk’)

o Ernst Cloos Memorial (2010, JHU研究生奖学金)

国际SCI期刊审稿人：《Geochim. Cosmochim. Acta》《Water》《Journal of Geophysical Research》《Earth Planet Sci. Lett.》