People A to Z

Mike SanClements

  • INSTAAR Affiliate
  • Staff Scientist, NEON


Soil science, ecology, and biogeochemistry, particularly the cycling of elements within natural systems and the response of these cycles to changing climate and atmospheric deposition.

Tania Schoennagel

  • Research Scientist of INSTAAR
  • Adjunct Faculty, Geography Department, CU-Boulder


Fire ecology, landscape ecology, geographic information systems (GIS), dendrochronology.

Guy Schumann

  • INSTAAR Affiliate
  • Scientist, Remote Sensing Solutions, Inc.


Currently working on R&D projects concerned with flood inundation modeling, floodplain mapping, and current and potential satellite missions for hydrology.

Tim Seastedt

  • Fellow of INSTAAR
  • Professor, Department of Ecology and Evolutionary Biology


Terrestrial ecosystem ecology; causes and feedbacks of biotic change; grassland ecology; plant-soil-animal interactions.

Brian Seok

  • 2013 PhD


Atmospheric chemistry, biogeochemistry, biosphere-atmosphere interactions, air-snow gas exchange.

Julio Sepúlveda

  • Fellow of INSTAAR
  • Assistant Professor of Organic Geochemistry


Organic and stable isotope biogeochemistry, geobiology, biomarker research, paleoceanography, paleoclimate, extreme climates, mass extinction events.

Owen Sherwood

  • INSTAAR Affiliate
  • Assistant Professor, Earth Sciences, Dalhousie University


Paleoceanography; biogeochemistry; petroleum geology; coral reefs

Sam Simkin

  • INSTAAR Affiliate
  • Staff Scientist, NEON


Ecosystem ecology, plant community ecology, biogeochemistry, landscape ecology

Joel Singley

  • PhD student
  • Graduate Research Assistant
  • Lead Graduate Teacher - Environmental Studies/Graduate Teaching Program
  • Graduate Teaching Assistant - Ecology & Evolutionary Biology
  • Graduate Teaching Assistant - Environmental Studies


Hydrology, biogeochemistry, science outreach and education

Dena Smith

  • INSTAAR Affiliate
  • Curator of Invertebrate Paleontology, CU Museum of Natural History
  • Associate Professor of Geological Sciences

Sarah A. Spaulding

  • Research Scientist II
  • Ecologist, US Geological Survey


My professional interest lies in diatoms, which are single-celled organisms contained within silica cell walls.

Robert F. Stallard

  • Fellow of INSTAAR
  • Research Hydrologist, U.S. Geological Survey
  • Research Scientist, Smithsonian Tropical Research Institute, Panama


Biogeochemistry, hydrology, and geomorphology.

Sharon Stammerjohn

  • Senior Research Associate
  • Adjunct Assoc Research Scientist, Lamont-Doherty Earth Observatory of Columbia University


Polar oceanography and climate, interdisciplinary approaches to understanding environmental and ecosystem response to climate variability.

Brian Straight

  • Graduate Student
  • PhD Student, Civil Engineering
  • Teaching Assistant, Dept of Atmospheric and Oceanographic Sciences
  • Teaching Assistant, Dept of Ecology and Evolutionary Biology
  • GK-12 Fellow, College of Engineering and Applied Science

James Syvitski

  • Fellow and Professor
  • Executive Director, CSDMS
  • Chair, IGBP


Oceanography, geological sciences, hydrology, numerical modeling, geophysics.