I am a geochemist and ecologist focused on trophic ecology and biogeochemistry of modern and past aquatic environments, primarily through the use of the nitrogen isotopes (δ15Noto) in modern and fossil fish otoliths (ear stones) and corals. I am applying δ15Noto to investigate food web variations in past oceans, from mid-Holocene…

Ph.D., 2017, "Use of the Nitrate Isotopes in the Ocean Interior to Explore the Isotopic Composition of Sinking Nitrogen and its Implications for Marine Biogeochemical Cycles"

Sergey has always been fascinated by the mechanical workings of things surrounding him - clocks, toys, pianos… His desire to know how the world is constructed brought him to the Russian chemical-technological university in Moscow, where he discovered the amazing power of the mass spectrometer to investigate the world. Sergey obtained his PhD…

Linhan Shen is a Postdoctoral Research Associate at Princeton University.  Linhan’s research in the Sigman Group is on the development of an optical spectrometer for nitrogen isotope analysis.  This work is in collaboration with Prof. Gerard Wyscocki from Princeton University for the development of this instrument.  Linhan…