Carbon and Sulfur isotope systematics of aerosols and trace gases in modern and paleo-atmosphere
Sanjeev is a researcher studying greenhouse gas release from Canadian Arctic river systems. He will employ state-of-the art instrumentation to study the greenhouse gas fluxes and use multiple-isotope probing techniques to study their age and sources. Prior to joining our department at Oxford University, he studied Environmental Science and Engineering at the École Polytechnique Fédérale de Lausanne, EPFL in Switzerland (MSc; 2012-2014), and completed a doctoral thesis at the Department of Environmental Science at Stockholm University, Sweden (PhD; 2016-2021). His doctoral thesis looked at isotope-based constraints on sources and processing of carbonaceous aerosols and by-products in polluted environments.
Upon earning his doctorate degree, Sanjeev secured the prestigious Marie-Skłodowska–Curie fellowship and conducted postdoctoral research (2021-2023) at the Institut des Géosciences de l’Environnement (IGE-CNRS) in France. At IGE, he investigated ozone layer depletion events in the ‘past’ using Antarctic and Greenland ice cores. His work has led to novel proxy development using sulfur isotopes and the aspect of mass-independent fractionation (S-MIF), and allowed for understanding of the changes in the tropospheric chemistry during timescale of ~41k BP (i.e., the Laschamp geomagnetic excursion event). During his postdoctoral research, Sanjeev also explored the role of S-MIF in ‘modern’ atmospheric aerosols and contributed towards answering some of the long-standing questions in the field of S-isotope geochemsitry.
Besides these experiences, he has secured several accolades including various fellowships and prizes in over five different countries internationally.
Both doctoral and postdoctoral research works of Sanjeev have been covered in press and media:
2022: Antarctic ice cores reveal ozone layer depletion events in the past
2019: Role of atmospheric brown carbon in wintertime S Asia