Vladimir A. Samarkin

Vladimir has studied microbial biogeochemistry of sulfur and carbon cycling in sedimentary uranium and native sulfur deposits, in ground waters, reservoirs, tundra soils, and extreme aquatic environments for forty years. He has participated at several research expeditions to the Arctic and Antarctic and has spent months at sea on oceanic research cruises. His current research interests are methane biogeochemistry and fluxes in Arctic shelf and subsea permafrost in relation to climate change; methane and sulfur cycling in perennially ice covered Antarctic lakes; and N2O formation in Antarctic, Dry Valleys Mars-analog environments in relation to astrobiology.


  • 1986, Ph.D. Geological and Mineralogical Sciences, Institute of Geology and Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Moscow, Russia  (Biogeochemistry)
  • 1969, M. Sci., Engineer, Exploration Geology, Moscow Institute of Exploration Geology, USSR Ministry of Higher Education, Moscow, Russia
  • (Applied Geochemistry, Petrology and Mineralogy)      


Research Interests

  • Microbial biogeochemistry of carbon and sulfur in extreme environments
  • Importance of Arctic shelf and permafrost in the atmospheric methane budget
  • Rate measurements of sulfate reduction, methanogenesis and methane oxidation using 35S, 14C and 3H – labeled tracers
  • Mechanisms of abiotic N2O production in Mars-analog extreme Antarctic environments, biogenic and abiogenic N2O isotopologues