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Lake Erie Center Environmental Sensor Network

This framework utilizes the eddy covariance method to quantify gas exchange rate by measuring the covariance of vertical wind velocity and CO2 concentration. It relies on a large homogeneous area for measurement and requires state-of-the-art instrumentation with quick response. It is the most direct and defensible method for measuring ecosystem gas fluxes.

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Lake Erie Center Environmental Sensor Network

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  1. Lake Erie CenterEnvironmental Sensor Network

  2. The Framework

  3. Eddy Covariance Method • Quantifies gas exchange rate as a covariance of vertical wind velocity and CO2 concentration • Relies on a large homogenous area (footprint) for measurement • Requires state-of-the-art instrumentation with very quick response (10 hz) • Most direct and defensible way to measure ecosystem gas fluxes

  4. Station Locations

  5. Station Telemetry

  6. Mobile Flux Station • Mounted on the bow of the Mayflier II • Route passes through the microcystis algal bloom at the estuarine of the Maumee River • Through the sedimentary flow south of the Detroit River • Near complete depiction of spatial fluxes in the Western basin

  7. Preliminary ResultsPermS1 Fall 2011

  8. Marshland (coastal wetland) and Cropland (agricultural field) Sites • Marshland releases evident methane during the day • Cropland releases methane during the day and uptakes small amounts during the night • The orders of methane fluxes are much smaller in the cropland than in the marshland.

  9. Acknowledgments • Partially funded by the FSML program of the NSF, NOAA, and USDAFS • Overseen by Jiquan Chen, Carol Stepien, Michael Deal, Johan Gottgens, Housen Chu, Richard Becker, Thomas Bridgeman, and Kevin Czajkowski at The University of Toledo

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