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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
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Myneni Group Department of Geosciences
Molecular Environmental Geochemistry Chemistry of natural organics Biogeochemistry of surfaces Ion solvation & aqueous chemistry
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The environmental processes governing climate change
What happens to carbon in the terrestrial biosphere?
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Soil organic matter (SOM) formation
debated
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Importance of SOM NOT debated Lehmann 2015
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The environmental processes governing climate change
What happens to SOM?
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Organo-mineral interactions
What type of minerals? What kind of compounds? How do minerals AND om associate? How is OM stabilized in soil?
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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…
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Model systems Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR FT-IR)
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Further investigation
Infrared spectroscopy (ATR FTIR) Mass spectroscopy Nuclear magnetic resonance (NMR) spectroscopy X-ray absorption spectroscopy Synchrotron light source …combine analytical techniques
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DOM Sampling, June 2016
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Analysis of Field Soil Samples
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Partitioning Pine Barrens soil samples
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Example IR spectra
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Field Sites: Sierra Nevada Research Institute (CA) – 08/2016
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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
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Acknowledgements Satish Myneni The Myneni lab group
Melissa Thaw (University of California-Merced) Princeton Environmental Institute Smith-Newton Family Scholars Program
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