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  • Presentation | B13N: The Global Methane Budget: Sources and Sinks in Natural and Anthropogenic Systems II Poster
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  • B13N-1746: Methane Emissions and the Carbon Balance of Wetlands and Other Ecosystems using In Situ and Satellite-Derived Estimation.
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  • Board 1746‚ Hall EFG (Poster Hall)
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Author(s):
Bassil El Masri, Murray State University (First Author, Presenting Author)
Zachary Brown, Murray State University
Matthew Johnson, Earth Science Division, NASA Ames Research Center
Liane Guild, NASA Ames Res Ctr
Christopher Potter, NASA Ames Research Center
Stephanie Pass, Bay Area Environmental Research Institute


The amount of methane (CH4) emission is highly variable and not well-qualified. Here, we analyze the relationship between net ecosystem productivity (NEP) and CH4 flux using eddy covariance flux tower data from more than 60 global sites. We found a significant relationship between NEP and CH4 fluxes for herbaceous ecosystems. We also calculated the ratio of CH4 to NEP and found that, in general, herbaceous ecosystems have a higher ratio than forested ecosystems. In addition, we related the ratio to the global warming potential of methane (GWPM). The results showed that on the short term (20 years) and long term (100 years), herbaceous swamps were a net source of greenhouse gases. Whereas, forested wetlands were a net sink. Future work should focus on improving our understanding of the wetlands' carbon cycle for a more robust global CH4 budget estimation.



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