Will Atkinson & Jana Suriano PEI Summer Research 2016

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Presentation transcript:

Will Atkinson & Jana Suriano PEI Summer Research 2016 The Role of Minerals on the Cycling and Stability of Organic Carbon in Soils Will Atkinson & Jana Suriano PEI Summer Research 2016

Myneni Group Department of Geosciences Molecular Environmental Geochemistry Chemistry of natural organics Biogeochemistry of surfaces Ion solvation & aqueous chemistry

The environmental processes governing climate change What happens to carbon in the terrestrial biosphere?

Soil organic matter (SOM) formation debated

Importance of SOM NOT debated Lehmann 2015 http://www.treepower.org/soils/soilorganicmatter.html

The environmental processes governing climate change What happens to SOM?

Organo-mineral interactions What type of minerals? What kind of compounds? How do minerals AND om associate? How is OM stabilized in soil?

Three areas of inquiry: NOM Model minerals In situ soil samples Lab adsorption experiments with OM, surface chemistry Ecosystems with different OM, soil minerals and climate Characteristics: DOM, POM, insoluble OM…

Model systems Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR FT-IR)

Further investigation Infrared spectroscopy (ATR FTIR) Mass spectroscopy Nuclear magnetic resonance (NMR) spectroscopy X-ray absorption spectroscopy  Synchrotron light source …combine analytical techniques

DOM Sampling, June 2016

Analysis of Field Soil Samples

Partitioning Pine Barrens soil samples

Example IR spectra

Field Sites: Sierra Nevada Research Institute (CA) – 08/2016

Future Field Sites Tropical: Costa Rica or Panama Boreal: Alaska Winter 2017? Costa Rica: Área de Conservación Guanacaste Panama: Smithsonian Tropical Research Institute More Fe- and Al-oxide rich Boreal: Alaska Summer 2017 Long Term Ecological Research (LTER) site More clay-rich www4.uwsp.edu

Acknowledgements Satish Myneni The Myneni lab group Melissa Thaw (University of California-Merced) Princeton Environmental Institute Smith-Newton Family Scholars Program