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The carbon balance of Lake Superior: Modeling lake processes and understanding impacts on the regional carbon budget

The North American Carbon Program (NACP) intends to (1) to develop   quantitative   scientific knowledge, robust observations, and models to determine   emissions and uptake   of CO2, CH4 and CO, changes in carbon stocks, and factors regulating   these processes for   North America and adjacent ocean basins; and (2) to develop the   scientific basis for full   carbon accounting on regional and continental scales. The Laurentian   Great Lakes cover   25% of the land area of the 8 Great Lakes states, and CO2 emission   and seasonal cycling   from them may be comparable to local terrestrial ecosystems. Though   their contributions   to the regional carbon balance may be significant, these fluxes are   currently poorly   understood. CO2 fluxes from Lake Superior are of particular interest   because they may   directly impact observations at nearby AmeriFlux towers, yet due to   lack of quantification,   Lake Superior fluxes are currently neglected in analysis of these   data.     Motivated by the clear need for improved knowledge of Great Lake CO2   fluxes, we will   couple an ecosystem-carbon module to an existing hydrodynamic model   of Lake Superior   to provide a first estimate of the spatial and temporal variability   of CO2 fluxes. We will   also obtain new wintertime observations of carbon parameters in the   lake to constrain this   model. Using model output, we will evaluate the direct impact of lake   CO2 fluxes on   observations at AmeriFlux towers, and also consider Lake Superior's   integrated impact on the regional carbon budget. Key research   questions are:  - What is the magnitude of the air-water carbon flux in Lake Superior?  - How are the fluxes controlled by variability in the physical   climate?  - Do winter samples from near-shore water intakes confirm model   predictions for winter months?  - What are the most important uncertainties to address in the carbon   budgets?  - How do Lake carbon fluxes impact the regional carbon budget?

Status
In progress
Type
Project
Start Date
End Date
Researchers
Galen McKinleyPrincipal Investigator
Associated with 1 projects
Chin WuResearcher
Associated with 1 projects
Ankur DesaiResearcher
Associated with 1 projects
Noel UrbanResearcher
Associated with 1 projects
Agencies
National Science Foundation $ 1,137,160.00Actual

Funding 6 projects for a total of $5,285,249.00
Scope of Study
Field Investigation
Literature / Existing Data
Numerical Modeling
Scale of Phenomena
Community
Ecosystem
Landscape
Physical/Chemical
Processes
Natural Ecological Processes
Natural Physical/Geological Processes
Lake Basin Connecting Channels
Lake Superior
Annex Numbers
Airborne Toxic Substances
Research & Development
Annex 17
Mass transfer of pollutants between GL Basin Ecosystem components
Physical and transformational processes affecting delivery of pollutants
General
Annex
  • Annex Numbers
    Annex Numbers
    Airborne Toxic Substances
    Research & Development
  • Annex 17
    Annex 17
    Mass transfer of pollutants between GL Basin Ecosystem components
    Physical and transformational processes affecting delivery of pollutants

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